CS4382A

CS4382A 114 dB, 192 kHz 8-Channel D/A Converter Features Advanced Multi-bit Delta Sigma Architecture 24-bit Conversion Up to 192 kHz Sample Rates 114 dB Dynamic Range -100 dB THD+N Direct Stream Digital® (DSD™) Mode On-chip 50 kHz Filter Matched PCM and DSD Analog Output Levels Selectable Digital Filters Volume Control with 1 dB Step Size and Soft Ramp Low Clock-jitter Sensitivity +5 V Analog Supply, +2.5 V Digital Supply Separate 1.8 to 5 V Logic Supplies for the Control & Serial Ports C o n tro l & S erial A u d io P o rt S u p p lies = 1.8 V to 5 V Description The CS4382A is a complete 8-channel digital-to-analog system. This D/A system includes digital de-emphasis, 1 dB step size volume control, ATAPI channel mixing, selectable fast and slow digital interpolation filters followed by an oversampled, multi-bit delta-sigma modulator which includes mismatch shaping technology that eliminates distortion due to capacitor mismatch. Following this stage is a multi-element switched capacitor stage and low-pass filter with differential analog outputs. The CS4382A also has a proprietary DSD processor which allows for 50 kHz on-chip filtering without an intermediate decimation stage. The CS4382A is available in a 48-pin LQFP package in both Commercial (-40°C to +85°C) and Automotive grades (-40°C to +105°C). The CDB4382A Customer Demonstration board is also available for device evaluation and implementation suggestions. Please see “Ordering Information” on page 48 for complete details. The CS4382A accepts PCM data at sample rates from 4 kHz to 216 kHz, DSD audio data, and delivers excellent sound quality. These features are ideal for multichannel audio systems including SACD players, A/V receivers, digital TV’s, mixing consoles, effects processors, sound cards, and automotive audio systems. D ig ital S u p p ly = 2.5 V A n alo g S u p p ly = 5 V Le ve l T ra nsla tor H ard w are Mo d e o r I2C /S P I S o ftw are Mo d e C o n tro l D ata R e giste r/H a rdwa re C onfigura tion Inte rna l V olta ge R e fe re nce R es et P C M S erial A u d io In p u t Le ve l T ra nsla tor S e ria l Inte rfa ce 8 V olume C ontrols D igita l F ilte rs Multi-bit ∆Σ Modula tors S witch-C a p D A C a nd A na log F ilte rs 8 8 D ifferen tial O u tp u ts D S D A u d io In p u t D S D P roce ssor -50 kH z filte r E xte rna l Mute C ontrol 2 Mu te S ig n als http://www.cirrus.com Copyright © Cirrus Logic, Inc. 2008 (All Rights Reserved) MAY '08 DS618F1 CS4382A TABLE OF CONTENTS 1. PIN DESCRIPTION ................................................................................................................................. 6 2. CHARACTERISTICS AND SPECIFICATIONS ...................................................................................... 8 RECOMMENDED OPERATING CONDITIONS .................................................................................... 8 ABSOLUTE MAXIMUM RATINGS ........................................................................................................ 8 DAC ANALOG CHARACTERISTICS - COMMERCIAL (-CQZ) ............................................................. 9 DAC ANALOG CHARACTERISTICS - AUTOMOTIVE (-DQZ) ........................................................... 10 POWER AND THERMAL CHARACTERISTICS .................................................................................. 11 COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE ...................................... 12 COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE ...................................... 13 DSD COMBINED DIGITAL & ON-CHIP ANALOG FILTER RESPONSE ............................................ 13 DIGITAL CHARACTERISTICS ............................................................................................................ 14 SWITCHING CHARACTERISTICS - PCM .......................................................................................... 15 SWITCHING CHARACTERISTICS - DSD ........................................................................................... 16 SWITCHING CHARACTERISTICS - CONTROL PORT - I²C FORMAT ............................................. 17 SWITCHING CHARACTERISTICS - CONTROL PORT - SPI FORMAT ............................................ 18 3. TYPICAL CONNECTION DIAGRAM .................................................................................................. 19 4. APPLICATIONS ................................................................................................................................... 21 4.1 Master Clock .................................................................................................................................. 21 4.2 Mode Select ................................................................................................................................... 21 4.3 Digital Interface Formats ................................................................................................................ 23 4.4 Oversampling Modes ..................................................................................................................... 24 4.5 Interpolation Filter .......................................................................................................................... 24 4.6 De-emphasis .................................................................................................................................. 24 4.7 ATAPI Specification ....................................................................................................................... 25 4.8 Direct Stream Digital (DSD) Mode ................................................................................................. 26 4.9 Grounding and Power Supply Arrangements ................................................................................ 26 4.9.1 Capacitor Placement ............................................................................................................. 26 4.10 Analog Output and Filtering ......................................................................................................... 26 4.11 Mute Control ................................................................................................................................ 27 4.12 Recommended Power-Up Sequence .......................................................................................... 28 4.12.1 Hardware Mode ................................................................................................................... 28 4.12.2 Software Mode .................................................................................................................... 28 4.13 Recommended Procedure for Switching Operational Modes ...................................................... 28 4.14 Control Port Interface ................................................................................................................... 28 4.14.1 MAP Auto Increment ........................................................................................................... 29 4.14.2 I²C Mode .............................................................................................................................. 29 4.14.2.1 I²C Write ................................................................................................................... 29 4.14.2.2 I²C Read .................................................................................................................. 29 4.14.3 SPI Mode ............................................................................................................................. 30 4.14.3.1 SPI Write .................................................................................................................. 30 4.15 Memory Address Pointer (MAP) ................................................................................................. 31 4.16 INCR (Auto Map Increment Enable) ............................................................................................ 31 4.16.1 MAP4-0 (Memory Address Pointer) .................................................................................... 31 5. REGISTER QUICK REFERENCE ........................................................................................................ 32 6. REGISTER DESCRIPTION .................................................................................................................. 33 6.1 Mode Control 1 (Address 01h) ....................................................................................................... 33 6.1.1 Control Port Enable (CPEN) .................................................................................................. 33 6.1.2 Freeze Controls (FREEZE) ................................................................................................... 33 6.1.3 Master Clock Divide Enable (MCLKDIV) ............................................................................... 33 6.1.4 DAC Pair Disable (DACx_DIS) .............................................................................................. 33 6.1.5 Power Down (PDN) ............................................................................................................... 34 6.2 Mode Control 2 (Address 02h) ....................................................................................................... 34 2 DS618F1 CS4382A 6.2.1 Digital Interface Format (DIF) ................................................................................................ 34 6.3 Mode Control 3 (Address 03h) ....................................................................................................... 35 6.3.1 Soft Ramp and Zero Cross Control (SZC) ............................................................................ 35 6.3.2 Single Volume Control (SNGLVOL) ...................................................................................... 36 6.3.3 Soft Volume Ramp-Up After Error (RMP_UP) ...................................................................... 36 6.3.4 Mutec Polarity (MUTEC+/-) ................................................................................................... 36 6.3.5 Auto-Mute (AMUTE) .............................................................................................................. 36 6.3.6 Mutec Pin Control (MUTEC) .................................................................................................. 37 6.4 Filter Control (Address 04h) ........................................................................................................... 37 6.4.1 Interpolation Filter Select (FILT_SEL) ................................................................................... 37 6.4.2 De-Emphasis Control (DEM) ................................................................................................. 37 6.4.3 Soft Ramp-Down Before Filter Mode Change (RMP_DN) .................................................... 37 6.5 Invert Control (Address 05h) .......................................................................................................... 38 6.5.1 Invert Signal Polarity (Inv_Xx) ............................................................................................... 38 6.6 Mixing Control Pair 1 (Channels A1 & B1)(Address 06h) Mixing Control Pair 2 (Channels A2 & B2)(Address 09h) Mixing Control Pair 3 (Channels A3 & B3)(Address 0Ch) Mixing Control Pair 4 (Channels A4 & B4)(Address 0Fh) .................................................................... 38 6.6.1 Channel A Volume = Channel B Volume (A=B) .................................................................... 38 6.6.2 ATAPI Channel Mixing and Muting (ATAPI) .......................................................................... 39 6.6.3 Functional Mode (FM) ........................................................................................................... 40 6.7 Volume Control (Addresses 07h, 08h, 0Ah, 0Bh, 0Dh, 0Eh) ........................................................ 40 6.7.1 Mute (MUTE) ......................................................................................................................... 40 6.7.2 Volume Control (XX_VOL) .................................................................................................... 41 6.8 Chip Revision (Address 12h) ......................................................................................................... 41 6.8.1 Part Number ID (PART) [Read Only] .................................................................................... 41 6.8.2 Revision ID (REV) [Read Only] ............................................................................................. 41 7. FILTER PLOTS ..................................................................................................................................... 42 8. PARAMETER DEFINITIONS ................................................................................................................ 46 9. PACKAGE DIMENSIONS .................................................................................................................... 47 10. ORDERING INFORMATION .............................................................................................................. 48 11. REFERENCES .................................................................................................................................... 48 12. REVISION HISTORY .......................................................................................................................... 49 DS618F1 3 CS4382A LIST OF FIGURES Figure 1.Serial Audio Interface Timing ...................................................................................................... 15 Figure 2.Direct Stream Digital - Serial Audio Input Timing ........................................................................ 16 Figure 3.Control Port Timing - I²C Format ................................................................................................. 17 Figure 4.Control Port Timing - SPI Format ................................................................................................ 18 Figure 5.Typical Connection Diagram, Software Mode ............................................................................. 19 Figure 6.Typical Connection Diagram, Hardware Mode ........................................................................... 20 Figure 7.Format 0 - Left-Justified up to 24-bit Data .................................................................................. 23 Figure 8.Format 1 - I²S up to 24-bit Data .................................................................................................. 23 Figure 9.Format 2 - Right-Justified 16-bit Data ......................................................................................... 23 Figure 10.Format 3 - Right-Justified 24-bit Data ....................................................................................... 23 Figure 11.Format 4 - Right-Justified 20-bit Data ....................................................................................... 24 Figure 12.Format 5 - Right-Justified 18-bit Data ....................................................................................... 24 Figure 13.De-Emphasis Curve .................................................................................................................. 25 Figure 14.ATAPI Block Diagram (x = channel pair 1, 2, 3, or 4) ............................................................... 25 Figure 15.Full-Scale Output ...................................................................................................................... 27 Figure 16.Recommended Output Filter ..................................................................................................... 27 Figure 17.Control Port Timing, I²C Mode .................................................................................................. 30 Figure 18.Control Port Timing, SPI Mode ................................................................................................. 30 Figure 19.Single-Speed (fast) Stopband Rejection ................................................................................... 42 Figure 20.Single-Speed (fast) Transition Band ......................................................................................... 42 Figure 21.Single-Speed (fast) Transition Band (detail) ............................................................................. 42 Figure 22.Single-Speed (fast) Passband Ripple ....................................................................................... 42 Figure 23.Single-Speed (slow) Stopband Rejection ................................................................................. 42 Figure 24.Single-Speed (slow) Transition Band ........................................................................................ 42 Figure 25.Single-Speed (slow) Transition Band (detail) ............................................................................ 43 Figure 26.Single-Speed (slow) Passband Ripple ...................................................................................... 43 Figure 27.Double-Speed (fast) Stopband Rejection ................................................................................. 43 Figure 28.Double-Speed (fast) Transition Band ........................................................................................ 43 Figure 29.Double-Speed (fast) Transition Band (detail) ............................................................................ 43 Figure 30.Double-Speed (fast) Passband Ripple ...................................................................................... 43 Figure 31.Double-Speed (slow) Stopband Rejection ................................................................................ 44 Figure 32.Double-Speed (slow) Transition Band ...................................................................................... 44 Figure 33.Double-Speed (slow) Transition Band (detail) .......................................................................... 44 Figure 34.Double-Speed (slow) Passband Ripple .................................................................................... 44 Figure 35.Quad-Speed (fast) Stopband Rejection .................................................................................... 44 Figure 36.Quad-Speed (fast) Transition Band .......................................................................................... 44 Figure 37.Quad-Speed (fast) Transition Band (detail) .............................................................................. 45 Figure 38.Quad-Speed (fast) Passband Ripple ........................................................................................ 45 Figure 39.Quad-Speed (slow) Stopband Rejection ................................................................................... 45 Figure 40.Quad-Speed (slow) Transition Band ......................................................................................... 45 Figure 41.Quad-Speed (slow) Transition Band (detail) ............................................................................. 45 Figure 42.Quad-Speed (slow) Passband Ripple ....................................................................................... 45 4 DS618F1 CS4382A LIST OF TABLES Table 1. Common Clock Frequencies ....................................................................................................... 21 Table 2. Digital Interface Format, Stand-Alone Mode Options .................................................................. 22 Table 3. Mode Selection, Stand-Alone Mode Options .............................................................................. 22 Table 4. Direct Stream Digital (DSD), Stand-Alone Mode Options ........................................................... 22 Table 5. Digital Interface Formats - PCM Mode ........................................................................................ 34 Table 6. Digital Interface Formats - DSD Mode ........................................................................................ 35 Table 7. ATAPI Decode ............................................................................................................................ 39 Table 8. Example Digital Volume Settings ................................................................................................ 41 DS618F1 5 CS4382A 1. PIN DESCRIPTION M3(DSD_SCLK) AOUTA1+ AOUTB1+ AOUTA1MUTEC1 AOUTB1- DSDA3 DSDB3 48 47 46 45 44 43 42 41 40 39 38 37 DSDA2 DSDB1 DSDA1 VD GND MCLK LRCK(DSD_EN) SDIN1 SCLK TST SDIN2 TST 1 2 3 4 5 6 7 8 9 10 11 12 36 35 34 33 32 AOUTA2AOUTA2+ AOUTB2+ AOUTB2VA GND AOUTA3AOUTA3+ AOUTB3+ AOUTB3AOUTA4AOUTA4+ DSDB2 DSDA4 DSDB4 VLS CS4382A 31 30 29 28 27 26 25 13 14 15 16 17 18 19 20 21 22 23 24 SDIN3 M2(SCL/CCLK) M1(SDA/CDIN) M0(AD0/CS) FILT+ AOUTB4+ VLC RST MUTEC2 SDIN4 VQ AOUTB4- Pin Name VD GND MCLK LRCK SDIN1 SDIN2 SDIN3 SDIN4 SCLK VLC RST FILT+ # 4 5 31 6 7 8 11 13 14 9 18 19 20 Pin Description Digital Power (Input) - Positive power supply for the digital section. Ground (Input) - Ground reference. Should be connected to analog ground. Master Clock (Input) - Clock source for the delta-sigma modulator and digital filters. Left Right Clock (Input) - Determines which channel, Left or Right, is currently active on the serial audio data line. The frequency of the left/right clock must be at the audio sample rate, Fs. Serial Audio Data Input (Input) - Input for two’s complement serial audio data. Serial Clock (Input) - Serial clock for the serial audio interface. Control Port Power (Input) - Determines the required signal level for the Control Port. Refer to the Recommended Operating Conditions for appropriate voltages. Reset (Input) - The device enters a low power mode and all internal registers are reset to their default settings when low. Positive Voltage Reference (Output) - Positive reference voltage for the internal sampling circuits. Requires the capacitive decoupling to analog ground, as shown in the Typical Connection Diagram. Quiescent Voltage (Output) - Filter connection for internal quiescent voltage. VQ must be capacitively coupled to analog ground, as shown in the Typical Connection Diagram. The nominal voltage level is specified in the Analog Characteristics and Specifications section. VQ presents an appreciable source impedance and any current drawn from this pin will alter device performance. However, VQ can be used to bias the analog circuitry assuming there is no AC signal component and the DC current is less than the maximum specified in the Analog Characteristics and Specifications section. Mute Control (Output) - The Mute Control pins go high during power-up initialization, reset, muting, power-down or if the master clock to left/right clock frequency ratio is incorrect. These pins are intended to be used as a control for external mute circuits to prevent the clicks and pops that can occur in any single supply system. The use of external mute circuits are not mandatory but may be desired for designs requiring the absolute minimum in extraneous clicks and pops. VQ 21 MUTEC1 MUTEC234 41 22 6 DS618F1 CS4382A Pin Name AOUTA1 +,AOUTB1 +,AOUTA2 +,AOUTB2 +,AOUTA3 +,AOUTB3 +,AOUTA4 +,AOUTB4 +,VA VLS TST # Pin Description 39, 40 38, 37 35, 36 34, 33 Differential Analog Output (Output) - The full-scale differential analog output level is specified in the 29, 30 Analog Characteristics specification table. 28, 27 25, 26 24, 23 32 43 10 12 Analog Power (Input) - Positive power supply for the analog section. Serial Audio Interface Power (Input) - Determines the required signal level for the serial audio interface. Refer to the Recommended Operating Conditions for appropriate voltages. Test - These pins need to be tied to analog ground. Software Mode Definitions SCL/CCLK 15 Serial Control Port Clock (Input) - Serial clock for the serial Control Port. Requires an external pull-up resistor to the logic interface voltage in I²C® Mode as shown in the Typical Connection Diagram. Serial Control Data (Input/Output) - SDA is a data I/O line in I²C Mode and requires an external pull-up resistor to the logic interface voltage, as shown in the Typical Connection Diagram. CDIN is the input data line for the Control Port interface in SPI™ Mode. Address Bit 0 (I²C) / Control Port Chip Select (SPI) (Input) - AD0 is a chip address pin in I²C Mode; CS is the chip select signal for SPI format. SDA/CDIN 16 AD0/CS 17 Stand-Alone Definitions M0 M1 M2 M3 DSD Definitions DSD_SCLK DSD_EN DSDA1 DSDB1 DSDA2 DSDB2 DSDA3 DSDB3 DSDA4 DSDB4 42 7 3 2 1 48 47 46 45 44 DSD Serial Clock (Input) - Serial clock for the Direct Stream Digital audio interface. DSD-Enable (Input) - When held at logic ‘1’ the device will enter DSD Mode (Stand-Alone mode only). 17 16 15 42 Mode Selection (Input) - Determines the operational mode of the device. Direct Stream Digital Input (Input) - Input for Direct Stream Digital serial audio data. DS618F1 7 CS4382A 2. CHARACTERISTICS AND SPECIFICATIONS RECOMMENDED OPERATING CONDITIONS (GND = 0 V; all voltages with respect to ground.) Parameters DC Power Supply Analog Power Digital Internal Power Serial Data Port Interface Power Control Port Interface Power Ambient Operating Temperature (power applied) Commercial Grade (-CQZ) Automotive Grade (-DQZ) Symbol VA VD VLS VLC TA Min 4.75 2.37 1.71 1.71 -40 -40 Typ 5.0 2.5 5.0 5.0 - Max 5.25 2.63 5.25 5.25 +85 +105 Units V V V V °C °C ABSOLUTE MAXIMUM RATINGS (GND = 0 V; all voltages with respect to ground.) Parameters Analog Power Digital Internal Power Serial Data Port Interface Power Control Port Interface Power Input Current Any Pin Except Supplies Digital Input Voltage Serial Data Port Interface Control Port Interface Ambient Operating Temperature (power applied) Storage Temperature DC Power Supply Symbol VA VD VLS VLC Iin VIND-S VIND-C Top Tstg Min -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -55 -65 Max 6.0 3.2 6.0 6.0 ±10 VLS+ 0.4 VLC+ 0.4 125 150 Units V V V V mA V V °C °C WARNING: Operation at or beyond these limits may result in permanent damage to the device. Normal operation is not guaranteed at these extremes. 8 DS618F1 CS4382A DAC ANALOG CHARACTERISTICS - COMMERCIAL (-CQZ) Test Conditions (unless otherwise specified): VA = VLS = VLC = 5 V; VD = 2.5 V; TA = 25°C; Full-Scale 997 Hz input sine wave (Note 1); Tested under max ac-load resistance; Valid with FILT+ and VQ capacitors as shown in “Typical Connection Diagram” on page 19; Measurement Bandwidth 10 Hz to 20 kHz. Parameters FS = 48 kHz, 96 kHz, 192 kHz and DSD Dynamic Range A-weighted Unweighted 16-bit A-weighted (Note 2) Unweighted 24-bit 0 dB -20 dB -60 dB THD+N 0 dB -20 dB -60 dB (1 kHz) 24-bit 108 105 VFS (Note 3) ZOUT IOUTmax RL CL VQ IQMAX 128%•VA 114 111 97 94 -100 -91 -51 -94 -74 -34 114 110 0.1 100 132%•VA 130 1.0 3 100 50%•VA 10 -94 -45 136%•VA dB dB dB dB dB dB dB dB dB dB dB dB dB ppm/°C Vpp Ω mA kΩ pF VDC µA Symbol Min Typ Max Unit Total Harmonic Distortion + Noise (Note 2) 16-bit Idle Channel Noise / Signal-to-noise Ratio Interchannel Isolation DC Accuracy Interchannel Gain Mismatch Gain Drift Analog Output Full-scale Differential Output Voltage Output Impedance Max DC Current Draw From an AOUT Pin Min AC-load Resistance Max Load Capacitance Quiescent Voltage Max Current draw from VQ Notes: 1. One-half LSB of triangular PDF dither is added to data. 2. Performance limited by 16-bit quantization noise. 3. VFS is tested under load RL and includes attenuation due to ZOUT DS618F1 9 CS4382A DAC ANALOG CHARACTERISTICS - AUTOMOTIVE (-DQZ) Test Conditions (unless otherwise specified): VA = 4.75 to 5.25 V; VLS = 1.71 to 5.25 V; VLC = 1.71 to 5.25 V; VD = 2.37 to 2.63 V; TA = -40°C to 85°C; Full-Scale 997 Hz input sine wave (Note 1); Tested under max ac-load resistance; Valid with FILT+ and VQ capacitors as shown in “Typical Connection Diagram” on page 19; Measurement Bandwidth 10 Hz to 20 kHz. Parameters FS = 48 kHz, 96 kHz, 192 kHz and DSD Dynamic Range A-weighted Unweighted 16-bit A-weighted (Note 2) Unweighted 24-bit 0 dB -20 dB -60 dB THD+N 0 dB -20 dB -60 dB (1 kHz) 24-bit 105 102 VFS (Note 3) ZOUT IOUTmax RL CL VQ IQMAX 128%•VA 114 111 97 94 -100 -91 -51 -94 -74 -34 114 110 0.1 100 132%•VA 130 1.0 3 100 50%•VA 10 -91 -42 136%•VA dB dB dB dB dB dB dB dB dB dB dB dB dB ppm/°C Vpp Ω mA kΩ pF VDC µA Symbol Min Typ Max Unit Total Harmonic Distortion + Noise (Note 2) 16-bit Idle Channel Noise / Signal-to-noise Ratio Interchannel Isolation DC Accuracy Interchannel Gain Mismatch Gain Drift Analog Output Full-scale Differential Output Voltage Output Impedance Max DC Current Draw From an AOUT Pin Min AC-load Resistance Max Load Capacitance Quiescent Voltage Max Current draw from VQ 10 DS618F1 CS4382A POWER AND THERMAL CHARACTERISTICS Parameters Power Supplies Power Supply Current (Note 4) Normal Operation, VA= 5 V VD= 2.5 V (Note 5) Interface Current, VLC=5 V VLS=5 V (Note 6) Power-down State (all supplies) Power Dissipation (Note 4) VA = 5 V, VD = 2.5 V Normal Operation (Note 6) Power-down Package Thermal Resistance Multi-layer Two-layer (1 kHz) (60 Hz) IA ID ILC ILS Ipd 84 20 2 75 200 470 1 48 65 15 60 40 91 25 520 mA mA µA µA µA mW mW °C/Watt °C/Watt °C/Watt dB dB Symbol Min Typ Max Units θJA θJA θJC PSRR Power Supply Rejection Ratio (Note 7) Notes: 4. Current consumption increases with increasing FS within a given speed mode and is signal-dependent. Max values are based on highest FS and highest MCLK. 5. ILC measured with no external loading on the SDA pin. 6. Power-down Mode is defined as RST pin = Low with all clock and data lines held static. 7. Valid with the recommended capacitor values on FILT+ and VQ as shown in Figures 5 and 6. DS618F1 11 CS4382A COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE The filter characteristics have been normalized to the sample rate (Fs) and can be referenced to the desired sample rate by multiplying the given characteristic by Fs. See Note 12. Fast Roll-Off Parameter Min Typ Combined Digital and On-chip Analog Filter Response - Single-Speed Mode - 48 kHz Passband (Note 9) Frequency Response Stop Band Stop-band Attenuation Group Delay De-emphasis Error (Note 11) (Relative to 1 kHz) to -0.01 dB corner to -3 dB corner 10 Hz to 20 kHz (Note 10) Fs = 32 kHz Fs = 44.1 kHz Fs = 48 kHz to -0.01 dB corner to -3 dB corner 10 Hz to 20 kHz (Note 10) 0 0 -0.01 0.547 102 0 0 -0.01 .583 80 0 0 -0.01 .635 90 10.4/Fs 6.15/Fs 7.1/Fs Max .454 .499 +0.01 ±0.23 ±0.14 ±0.09 .430 .499 +0.01 .105 .490 +0.01 - Unit Fs Fs dB Fs dB s dB dB dB Fs Fs dB Fs dB s Fs Fs dB Fs dB s Combined Digital and On-chip Analog Filter Response - Double-Speed Mode - 96 kHz Passband (Note 9) Frequency Response Stop Band Stop-band Attenuation Group Delay Passband (Note 9) Frequency Response Stop Band Stop-band Attenuation Group Delay Combined Digital and On-chip Analog Filter Response - Quad-Speed Mode - 192 kHz to -0.01 dB corner to -3 dB corner 10 Hz to 20 kHz (Note 10) Notes: 8. Slow roll-off interpolation filter is only available in Software Mode. 9. Response is clock-dependent and will scale with Fs. 10. For Single-Speed Mode, the Measurement Bandwidth is from stopband to 3 Fs. For Double-Speed Mode, the Measurement Bandwidth is from stopband to 3 Fs. For Quad-Speed Mode, the Measurement Bandwidth is from stopband to 1.34 Fs. 11. De-emphasis is available only in Single-Speed Mode; only 44.1 kHz De-emphasis is available in Hardware Mode. 12. Amplitude vs. Frequency plots of this data are available in Section 7. “Filter Plots” on page 42. 12 DS618F1 CS4382A COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE (CONTINUED) Parameter Single-Speed Mode - 48 kHz Passband (Note 9) Frequency Response Stop Band Stop-band Attenuation Group Delay De-emphasis Error (Note 11) (Relative to 1 kHz) to -0.01 dB corner to -3 dB corner 10 Hz to 20 kHz (Note 10) Fs = 32 kHz Fs = 44.1 kHz Fs = 48 kHz to -0.01 dB corner to -3 dB corner 10 Hz to 20 kHz (Note 10) Slow Roll-Off (Note 8) Min Typ Max 0 0 -0.01 .583 64 0 0 -0.01 .792 70 0 0 -0.01 .868 75 7.8/Fs 5.4/Fs 6.6/Fs 0.417 0.499 +0.01 ±0.36 ±0.21 ±0.14 .296 .499 +0.01 .104 .481 +0.01 - Unit Fs Fs dB Fs dB s dB dB dB Fs Fs dB Fs dB s Fs Fs dB Fs dB s Double-Speed Mode - 96 kHz Passband (Note 9) Frequency Response Stop Band Stop-band Attenuation Group Delay Quad-Speed Mode - 192 kHz Passband (Note 9) Frequency Response Stop Band Stop-band Attenuation Group Delay to -0.01 dB corner to -3 dB corner 10 Hz to 20 kHz (Note 10) DSD COMBINED DIGITAL & ON-CHIP ANALOG FILTER RESPONSE Parameter DSD Processor mode Passband (Note 9) Frequency Response Roll-off to -3 dB corner 10 Hz to 20 kHz 0 -0.05 27 50 +0.05 kHz dB dB/Oct Min Typ Max Unit DS618F1 13 CS4382A DIGITAL CHARACTERISTICS Parameters Input Leakage Current Input Capacitance High-level Input Voltage Low-level Input Voltage Low-level Output Voltage (IOL = -1.2 mA) Maximum MUTEC Drive Current MUTEC High-level Output Voltage MUTEC Low-level Output Voltage (Note 13) Serial I/O Control I/O Serial I/O Control I/O Control I/O = 3.3 V, 5 V Control I/O = 1.8 V, 2.5 V Symbol Iin VIH VIH VIL VIL VOL VOL Imax VOH VOL Min 70% 70% - Typ 8 3 VA 0 Max ±10 30% 30% 20% 25% - Units µA pF VLS VLC VLS VLC VLC VLC mA V V 13. Any pin except supplies. Transient currents of up to ±100 mA on the input pins will not cause SCR latchup. 14 DS618F1 CS4382A SWITCHING CHARACTERISTICS - PCM (Inputs: Logic 0 = GND, Logic 1 = VLS, CL = 30 pF) Parameters RST pin Low Pulse Width MCLK Frequency MCLK Duty Cycle Input Sample Rate - LRCK (Note 15) Single-speed Mode Double-speed Mode Quad-speed Mode Fs Fs Fs (Note 14) Symbol Min 1 1.024 45 4 50 100 45 45 Max 55.2 55 54 108 216 55 55 - Units ms MHz % kHz kHz kHz % % ns ns ns ns ns LRCK Duty Cycle SCLK Duty Cycle SCLK High Time SCLK Low Time LRCK Edge to SCLK rising edge SDIN Setup Time before SCLK rising edge SDIN Hold Time after SCLK rising edge tsckh tsckl tlcks tds tdh 8 8 5 3 5 Notes: 14. After powering up, RST should be held low until after the power supplies and clocks are settled. 15. See Table 1 on page 21 for suggested MCLK frequencies. LRCK tlcks tsckh tsckl SCLK tds SDINx tdh MSB MSB-1 Figure 1. Serial Audio Interface Timing DS618F1 15 CS4382A SWITCHING CHARACTERISTICS - DSD (Logic 0 = AGND = DGND; Logic 1 = VLS; CL = 20 pF) Parameter MCLK Duty Cycle DSD_SCLK Pulse Width Low DSD_SCLK Pulse Width High DSD_SCLK Frequency Symbol tsclkl tsclkh Min 40 160 160 1.024 2.048 20 20 Typ - Max 60 3.2 6.4 - Unit % ns ns MHz MHz ns ns (64x Oversampled) (128x Oversampled) DSD_A / _B valid to DSD_SCLK rising setup time DSD_SCLK rising to DSD_A or DSD_B hold time tsdlrs tsdh t sclkh t sclkl DSD_SCLK t sdlrs DSDxx t sdh Figure 2. Direct Stream Digital - Serial Audio Input Timing 16 DS618F1 CS4382A SWITCHING CHARACTERISTICS - CONTROL PORT - I²C FORMAT (Inputs: Logic 0 = GND, Logic 1 = VLC, CL = 30 pF) Parameter SCL Clock Frequency RST Rising Edge to Start Bus Free Time Between Transmissions Start Condition Hold Time (prior to first clock pulse) Clock Low time Clock High Time Setup Time for Repeated Start Condition SDA Hold Time from SCL Falling SDA Setup time to SCL Rising Rise Time of SCL and SDA Fall Time SCL and SDA Setup Time for Stop Condition Acknowledge Delay from SCL Falling (Note 16) Symbol fscl tirs tbuf thdst tlow thigh tsust thdd tsud trc, trc tfc, tfc tsusp tack Min 500 4.7 4.0 4.7 4.0 4.7 0 250 4.7 300 Max 100 1 300 1000 Unit kHz ns µs µs µs µs µs µs ns µs ns µs ns Notes: 16. Data must be held for sufficient time to bridge the transition time, tfc, of SCL. RST t irs Stop SDA t buf SCL R e p e a te d S ta rt S ta rt Stop t hdst t high t hdst tf t susp t lo w t hdd t sud t sust tr Figure 3. Control Port Timing - I²C Format DS618F1 17 CS4382A SWITCHING CHARACTERISTICS - CONTROL PORT - SPI FORMAT (Inputs: Logic 0 = GND, Logic 1 = VLC, CL = 30 pF) Parameter CCLK Clock Frequency RST Rising Edge to CS Falling CCLK Edge to CS Falling CS High Time Between Transmissions CS Falling to CCLK Edge CCLK Low Time CCLK High Time CDIN to CCLK Rising Setup Time CCLK Rising to DATA Hold Time Rise Time of CCLK and CDIN Fall Time of CCLK and CDIN (Note 18) (Note 19) (Note 19) (Note 17) Symbol fsclk tsrs tspi tcsh tcss tscl tsch tdsu tdh tr2 tf2 Min 500 500 1.0 20 66 66 40 15 - Max 6 100 100 Unit MHz ns ns µs ns ns ns ns ns ns ns Notes: 17. tspi only needed before first falling edge of CS after RST rising edge. tspi = 0 at all other times. 18. Data must be held for sufficient time to bridge the transition time of CCLK. 19. For FSCK < 1 MHz. RST t srs CS t spi t css CCLK t r2 C D IN t scl t sch t csh t f2 t dsu t dh Figure 4. Control Port Timing - SPI Format 18 DS618F1 CS4382A 3. TYPICAL CONNECTION DIAGRAM +2.5 V 1 µF + 0.1 µF 4 VD 32 VA AOUTA1+ AOUTA1AOUTB1+ 6 7 PCM Digital Audio Source 9 8 11 13 14 470 Ω +5 V 0.1 µF + 1 µF 39 40 38 37 35 36 34 33 29 30 28 27 25 26 24 23 Analog Conditioning and Muting 220 Ω MCLK LRCK SCLK SDIN1 SDIN2 SDIN3 SDIN4 AOUTB1AOUTA2+ AOUTA2AOUTB2+ AOUTB2AOUTA3+ Analog Conditioning and Muting Analog Conditioning and Muting Analog Conditioning and Muting +1.8 V to +5 V 43 0.1 µF 470 Ω VLS AOUTA3- Analog Conditioning and Muting CS4382A AOUTB3+ AOUTB3- Analog Conditioning and Muting 3 2 1 DSDA1 DSDB1 DSDA2 DSDB2 DSDA3 DSDB3 DSDA4 DSDB4 DSD_SCLK AOUTA4+ AOUTA4AOUTB4+ AOUTB4- Analog Conditioning and Muting DSD Audio Source 48 47 46 45 44 42 Analog Conditioning and Muting 41 MUTEC1 MUTEC234 22 Mute Drive 19 MicroController 15 16 17 2 KΩ 2 KΩ RST SCL/CCLK SDA/CDIN ADO/CS Note* 18 0.1 µF FILT+ 20 VLC VQ 21 0.1 µ F + 1 µF 0.1 µ F + 47 µF +1.8 V to +5 V Note: Necessary for I C control port operation 2 GND 5 GND TST* 31 NOTETST: Pins 10 and 12 Figure 5. Typical Connection Diagram, Software Mode DS618F1 19 CS4382A +2.5 V 1 µF + 0.1 µF 4 VD NoteDSD 47 KΩ 32 VA AOUTA1+ AOUTA1AOUTB1+ 6 7 PCM Digital Audio Source 9 8 11 13 14 470 Ω +5 V 0.1 µF + 1 µF 39 40 38 37 Analog Conditioning and Muting VLS 220 Ω MCLK LRCK SCLK SDIN1 SDIN2 SDIN3 SDIN4 AOUTB1- Analog Conditioning and Muting MUTEC1 41 Mute Drive AOUTA2+ AOUTA2AOUTB2+ 35 36 34 33 29 30 28 27 25 26 24 23 Analog Conditioning and Muting Analog Conditioning and Muting Analog Conditioning and Muting +1.8 V to +5 V 43 0.1 µF VLS CS4382A AOUTB2AOUTA3+ Analog Conditioning and Muting 470 Ω 3 2 1 AOUTA3DSDA1 DSDB1 DSDA2 DSDB2 DSDA3 DSDB3 DSDA4 DSDB4 AOUTA4+ AOUTA4AOUTB4+ AOUTB4AOUTB3+ AOUTB3- Analog Conditioning and Muting DSD Audio Source 48 47 46 45 44 NoteDSD Optional 47 KΩ Analog Conditioning and Muting 42 15 M3(DSD_SCLK) M2 M1 M0 RST MUTEC234 22 Mute Drive Stand-Alone Mode Configuration 16 17 19 FILT+ 20 VQ +1.8 V to +5 V 18 0.1 µF VLC 21 0.1 µF + 1 µF 0.1 µF + 47 µF GND 5 GND 31 TST 10, 12 NoteDSD: For DSD operation: 1) LRCK must be tied to VLS and remain static high. 2) M3 PCM stand-alone configuration pin becomes DSD_SCLK Figure 6. Typical Connection Diagram, Hardware Mode 20 DS618F1 CS4382A 4. APPLICATIONS The CS4382A serially accepts two’s-complement formatted PCM data at standard audio sample rates including 48, 44.1, and 32 kHz in SSM, 96, 88.2, and 64 kHz in DSM, and 192, 176.4, and 128 kHz in QSM. Audio data is input via the serial data input pins (SDINx). The Left/Right Clock (LRCK) determines which channel is currently being input on SDINx, and the Serial Clock (SCLK) clocks audio data into the input data buffer. The CS4382A can be configured in Hardware Mode by the M0, M1, M2, M3, and DSD_EN pins and in Software Mode through I²C or SPI. 4.1 Master Clock MCLK/LRCK must be an integer ratio as shown in Table 1. The LRCK frequency is equal to Fs, the frequency at which words for each channel are input to the device. The MCLK-to-LRCK frequency ratio is detected automatically during the initialization sequence by counting the number of MCLK transitions during a single LRCK period. Internal dividers are then set to generate the proper internal clocks. Table 1 illustrates several standard audio sample rates and the required MCLK and LRCK frequencies. Please note there is no required phase relationship, but MCLK, LRCK, and SCLK must be synchronous. Speed Mode (sample-rate range) MCLK Ratio Single-Speed (4 to 50 kHz) MCLK Ratio Double-Speed (50 to 100 kHz) Sample Rate (kHz) MCLK (MHz) 256x 8.1920 11.2896 12.2880 128x 8.1920 11.2896 12.2880 64x 11.2896 12.2880 384x 12.2880 16.9344 18.4320 192x 12.2880 16.9344 18.4320 96x 16.9344 18.4320 512x 16.3840 22.5792 24.5760 256x 16.3840 22.5792 24.5760 128x 22.5792 24.5760 768x 24.5760 33.8688 36.8640 384x 24.5760 33.8688 36.8640 192x 33.8688 36.8640 Software Mode Only 1024x* 32.7680 45.1584 49.1520 512x* 32.7680 45.1584 49.1520 256x* 45.1584 49.1520 32 44.1 48 64 88.2 96 MCLK Ratio 176.4 Quad-Speed (100 to 200 kHz) 192 Note: These modes are only available in Software Mode by setting the MCLKDIV bit = 1. Table 1. Common Clock Frequencies 4.2 Mode Select In Hardware Mode, operation is determined by the Mode Select pins. The states of these pins are continually scanned for any changes; however, the mode should only be changed while the device is in reset (RST pin low) to ensure proper switching from one mode to another. These pins require connection to supply or ground as outlined in Figure 6. VLC supplies M0, M1, and M2. VLS supplies M3 and DSD_EN. Tables 2 - 4 show the decode of these pins. In Software Mode, the operational mode and data format are set in the FM and DIF registers. See “Digital Interface Format (DIF)” on page 34 and “Functional Mode (FM)” on page 40. DS618F1 21 CS4382A M1 (DIF1) 0 0 1 1 M0 (DIF0) 0 1 0 1 DESCRIPTION FORMAT FIGURE Left-justified, up to 24-bit data I²S, up to 24-bit data Right-justified, 16-bit Data Right-justified, 24-bit Data Table 2. Digital Interface Format, Stand-Alone Mode Options 0 1 2 3 Figure 7 Figure 8 Figure 9 Figure 10 M3 0 0 1 1 M2 (DEM) 0 1 0 1 DESCRIPTION Single-speed without De-emphasis (4 to 50 kHz sample rates) Single-speed with 44.1 kHz De-Emphasis; see Figure 13 Double-speed (50 to 100 kHz sample rates) Quad-speed (100 to 200 kHz sample rates) Table 3. Mode Selection, Stand-Alone Mode Options DSD_EN (LRCK) 1 1 1 1 1 1 1 1 M2 M1 M0 DESCRIPTION 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 64x oversampled DSD data with a 4x MCLK to DSD data rate 64x oversampled DSD data with a 6x MCLK to DSD data rate 64x oversampled DSD data with a 8x MCLK to DSD data rate 64x oversampled DSD data with a 12x MCLK to DSD data rate 128x oversampled DSD data with a 2x MCLK to DSD data rate 128x oversampled DSD data with a 3x MCLK to DSD data rate 128x oversampled DSD data with a 4x MCLK to DSD data rate 128x oversampled DSD data with a 6x MCLK to DSD data rate Table 4. Direct Stream Digital (DSD), Stand-Alone Mode Options 22 DS618F1 CS4382A 4.3 Digital Interface Formats The serial port operates as a slave and supports the I²S, Left-justified, and Right-justified digital interface formats with varying bit depths from 16 to 24 as shown in Figures 7-12. Data is clocked into the DAC on the rising edge. LRCK SCLK Left Channel Right Channel SDINx MSB -1 -2 -3 -4 -5 +5 +4 +3 +2 +1 LSB MSB -1 -2 -3 -4 +5 +4 +3 +2 +1 LSB Figure 7. Format 0 - Left-Justified up to 24-bit Data LRCK SCLK Left Channel Right Channel SDINx MSB -1 -2 -3 -4 -5 +5 +4 +3 +2 +1 LSB MSB -1 -2 -3 -4 +5 +4 +3 +2 +1 LSB Figure 8. Format 1 - I²S up to 24-bit Data LRCK Left Channel Right Channel SCLK SDINx 15 14 13 12 11 10 9 8 7 6 5 4 3 21 0 15 14 13 12 11 10 9 8 7 6 5 4 3 21 0 32 clocks Figure 9. Format 2 - Right-Justified 16-bit Data LRCK Left Channel Right Channel SCLK SDINx 0 23 22 21 20 19 18 7 6 5 4 3 21 0 23 22 21 20 19 18 7 6 5 4 3 21 0 32 clocks Figure 10. Format 3 - Right-Justified 24-bit Data DS618F1 23 CS4382A LRCK Left Channel Right Channel SCLK SDINx 10 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 43 2 1 0 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 32 clocks Figure 11. Format 4 - Right-Justified 20-bit Data LRCK Left Channel Right Channel SCLK SDINx 10 17 16 15 14 13 12 11 10 9 8 7 6 5 432 1 0 17 16 15 14 13 12 11 10 9 8 7 6 5 43 2 10 32 clocks Figure 12. Format 5 - Right-Justified 18-bit Data 4.4 Oversampling Modes The CS4382A operates in one of three oversampling modes based on the input sample rate. Mode selection is determined by the DSD_EN, M3, and M2 pins in Hardware Mode or the FM bits in Software Mode. Singlespeed mode supports input sample rates up to 50 kHz and uses a 128x oversampling ratio. Double-speed Mode supports input sample rates up to 100 kHz and uses an oversampling ratio of 64x. Quad-speed Mode supports input sample rates up to 200 kHz and uses an oversampling ratio of 32x. 4.5 Interpolation Filter To accommodate the increasingly complex requirements of digital audio systems, the CS4382A incorporates selectable interpolation filters for each mode of operation. A “fast” and a “slow” roll-off filter is available in each of Single, Double, and Quad-Speed modes. These filters have been designed to accommodate a variety of musical tastes and styles. The FILT_SEL bit is used to select which filter is used (see the “Filter Plots” on page 42 for more details). When in Hardware Mode, only the “fast” roll-off filter is available. Filter specifications can be found in Section 2, and filter response plots can be found in Figures 19 to 42. 4.6 De-emphasis The CS4382A includes on-chip digital de-emphasis filters. The de-emphasis feature is included to accommodate older audio recordings that utilize pre-emphasis equalization as a means of noise reduction. Figure 13 shows the de-emphasis curve. The frequency response of the de-emphasis curve will scale proportionally with changes in sample rate (Fs) if the input sample rate does not match the coefficient which has been selected. 24 DS618F1 CS4382A In Software Mode, the required de-emphasis filter coefficients for 32 kHz, 44.1 kHz, or 48 kHz are selected via the de-emphasis control bits. In Hardware Mode, only the 44.1 kHz coefficient is available (enabled through the M2 pin). If the input sample rate is not 44.1 kHz and de-emphasis has been selected, the corner frequencies of the de-emphasis filter will be scaled by a factor of the actual Fs over 44,100. Gain dB T1=50 µs 0dB T2 = 15 µs -10dB F1 3.183 kHz F2 Frequency 10.61 kHz Figure 13. De-Emphasis Curve 4.7 ATAPI Specification The CS4382A implements the channel mixing functions of the ATAPI CD-ROM specification. The ATAPI functions are applied per A-B pair. Refer to Table 8 on page 41 and Figure 14 for additional information. Left Channel Audio Data A Channel Volume Control MUTE Aout Ax SDINx Σ Σ Right Channel Audio Data B Channel Volume Control MUTE AoutBx Figure 14. ATAPI Block Diagram (x = channel pair 1, 2, 3, or 4) DS618F1 25 CS4382A 4.8 Direct Stream Digital (DSD) Mode In Stand-alone Mode, DSD operation is selected by holding DSD_EN(LRCK) high and applying the DSD data and clocks to the appropriate pins. The M[2:0] pins set the expected DSD rate and MCLK ratio. In Control Port Mode, the FM bits set the device into DSD Mode (DSD_EN pin is not required to be held high). The DIF register then controls the expected DSD rate and MCLK ratio. During DSD operation, the PCM related pins should either be tied low or remain active with clocks (except LRCK in Stand-alone Mode). When the DSD related pins are not being used, they should either be tied static low or remain active with clocks (except M3 in Stand-alone Mode). 4.9 Grounding and Power Supply Arrangements As with any high-resolution converter, the CS4382A requires careful attention to power supply and grounding arrangements if its potential performance is to be realized. The Typical Connection Diagram shows the recommended power arrangements, with VA, VD, VLC, and VLS connected to clean supplies. If the ground planes are split between digital ground and analog ground, the GND pins of the CS4382A should be connected to the analog ground plane. All signals, especially clocks, should be kept away from the FILT+ and VQ pins in order to avoid unwanted coupling into the DAC. 4.9.1 Capacitor Placement Decoupling capacitors should be placed as close to the DAC as possible, with the low-value ceramic capacitor being the closest. To further minimize impedance, these capacitors should be located on the same layer as the DAC. If desired, all supply pins with similar voltage ratings may be connected to the same supply, but a decoupling capacitor should still be placed on each supply pin. Notes: All decoupling capacitors should be referenced to analog ground. The CDB4382A evaluation board demonstrates the optimum layout and power supply arrangements. 4.10 Analog Output and Filtering The application note “Design Notes for a 2-pole Filter with Differential Input” discusses the second-order Butterworth filter and differential-to-single-ended converter which was implemented on the CS4382A evaluation board, CDB4382A, as seen in Figure 16. The CS4382A does not include phase or amplitude compensation for an external filter. Therefore, the DAC system phase and amplitude response will be dependent on the external analog circuitry. The off-chip filter has been designed to attenuate the typical full-scale output level to below 2 Vrms. Figure 15 shows how the full-scale differential analog output level specification is derived. 26 DS618F1 CS4382A 3.85 V AOUT+ 2.5 V 1.15 V 3.85 V AOUT2.5 V 1.15 V Full-Scale Output Level= (AOUT+) - (AOUT-)= 6.7 Vpp Figure 15. Full-Scale Output Figure 16. Recommended Output Filter 4.11 Mute Control The Mute Control pins go active during power-up initialization, reset, muting, or if the MCLK-to-LRCK ratio is incorrect. These pins are intended to be used as control for external mute circuits to prevent the clicks and pops that can occur in any single-ended, single-supply system. Use of the Mute Control function is not mandatory but recommended for designs requiring the absolute minimum in extraneous clicks and pops. Also, use of the Mute Control function can enable the system designer to achieve idle channel noise/signal-to-noise ratios which are only limited by the external mute circuit. Please see the CDB4382A data sheet for a suggested mute circuit. DS618F1 27 CS4382A 4.12 Recommended Power-Up Sequence 4.12.1 Hardware Mode 1. Hold RST low until the power supplies and configuration pins are stable, and the master and left/right clocks are locked to the appropriate frequencies, as discussed in Section 4.1. In this state, the registers are reset to the default settings, FILT+ will remain low, and VQ will be connected to VA/2. If RST can not be held low long enough the SDINx pins should remain static low until all other clocks are stable, and if possible the RST should be toggled low again once the system is stable. 2. Bring RST high. The device will remain in a low power state with FILT+ low and will initiate the Hardware power-up sequence after approximately 512 LRCK cycles in Single-Speed Mode (1024 LRCK cycles in Double-Speed Mode, and 2048 LRCK cycles in Quad-Speed Mode). 4.12.2 Software Mode 1. Hold RST low until the power supply is stable, and the master and left/right clocks are locked to the appropriate frequencies, as discussed in Section 4.1. In this state, the registers are reset to the default settings; FILT+ will remain low, and VQ will be connected to VA/2. 2. Bring RST high. The device will remain in a low-power state with FILT+ low for 512 LRCK cycles in Single-speed Mode (1024 LRCK cycles in Double-speed Mode, and 2048 LRCK cycles in Quadspeed Mode). 3. In order to reduce the chances of clicks and pops, perform a write to the CP_EN bit prior to the completion of approximately 512 LRCK cycles in Single-speed Mode (1024 LRCK cycles in Doublespeed Mode, and 2048 LRCK cycles in Quad-speed Mode). The desired register settings can be loaded while keeping the PDN bit set to 1. Set the RMP_UP and RMP_DN bits to 1; then set the format and mode control bits to the desired settings. If more than the stated number of LRCK cycles passes before CPEN bit is written, the chip will enter Hardware Mode and begin to operate with the M0-M3 as the mode settings. CPEN bit may be written at anytime, even after the Hardware sequence has begun. It is advised that if the CPEN bit cannot be set in time, the SDINx pins should remain static low (this way, no audio data can be converted incorrectly by the Hardware Mode settings). 4. Set the PDN bit to 0. This will initiate the power-up sequence, which lasts approximately 50 µs. 4.13 Recommended Procedure for Switching Operational Modes For systems where the absolute minimum in clicks and pops is required, it is recommended that the MUTE bits are set prior to changing significant DAC functions (such as changing sample rates or clock sources). The mute bits may then be released after clocks have settled and the proper modes have been set. It is required to have the device held in reset if the minimum high/low time specs of MCLK cannot be met during clock source changes. 4.14 Control Port Interface The Control Port is used to load all the internal register settings in order to operate in Software Mode (see the “Filter Plots” on page 42). The operation of the Control Port may be completely asynchronous with the audio sample rate. However, to avoid potential interference problems, the Control Port pins should remain static if no operation is required. The Control Port operates in one of two modes: I²C or SPI. 28 DS618F1 CS4382A 4.14.1 MAP Auto Increment The device has MAP (memory address pointer) auto-increment capability enabled by the INCR bit (also the MSB) of the MAP. If INCR is set to 0, MAP will stay constant for successive I²C writes or reads and SPI writes. If INCR is set to 1, MAP will auto increment after each byte is written, allowing block reads or writes of successive registers. 4.14.2 I²C Mode In the I²C Mode, data is clocked into and out of the bi-directional serial control data line, SDA, by the serial Control Port clock, SCL (see Figure 17 for the clock to data relationship). There is no CS pin. Pin AD0 enables the user to alter the chip address (001100[AD0][R/W]) and should be tied to VLC or GND, as required, before powering up the device. If the device ever detects a high-to-low transition on the AD0/CS pin after power-up, SPI Mode will be selected. 4.14.2.1 I²C Write To write to the device, follow the procedure below while adhering to the Control Port Switching Specifications in Section 2. 1. Initiate a START condition to the I²C bus followed by the address byte. The upper 6 bits must be 001100. The seventh bit must match the setting of the AD0 pin, and the eighth must be 0. The eighth bit of the address byte is the R/W bit. 2. Wait for an acknowledge (ACK) from the part; then write to the memory address pointer, MAP. This byte points to the register to be written. 3. Wait for an acknowledge (ACK) from the part; then write the desired data to the register pointed to by the MAP. 4. If the INCR bit (see Section 4.14.1) is set to 1, repeat the previous step until all the desired registers are written, then initiate a STOP condition to the bus. 5. If the INCR bit is set to 0 and further I²C writes to other registers are desired, it is necessary to initiate a repeated START condition and follow the procedure detailed from step 1. If no further writes to other registers are desired, initiate a STOP condition to the bus. 4.14.2.2 I²C Read To read from the device, follow the procedure below while adhering to the Control Port Switching Specifications. 1. Initiate a START condition to the I²C bus followed by the address byte. The upper 6 bits must be 001100. The seventh bit must match the setting of the AD0 pin, and the eighth must be 1. The eighth bit of the address byte is the R/W bit. 2. After transmitting an acknowledge (ACK), the device will then transmit the contents of the register pointed to by the MAP. The MAP register will contain the address of the last register written to the MAP, or the default address (see Section 4.14.1) if an I²C read is the first operation performed on the device. 3. Once the device has transmitted the contents of the register pointed to by the MAP, issue an ACK. 4. If the INCR bit is set to 1, the device will continue to transmit the contents of successive registers. Continue providing a clock and issue an ACK after each byte until all the desired registers are read; then initiate a STOP condition to the bus. 5. If the INCR bit is set to 0 and further I²C reads from other registers are desired, it is necessary to initiate a repeated START condition and follow the procedure detailed from steps 1 and 2 from the I²C Write DS618F1 29 CS4382A instructions followed by step 1 of the I²C Read section. If no further reads from other registers are desired, initiate a STOP condition to the bus. N o te 1 SDA 0 01 1 00 ADDR AD 0 R /W ACK D AT A 1-8 ACK D A TA 1-8 ACK SCL S ta rt S top N o te : If o p e ra tio n is a w rite , th is b y te c o n ta in s th e M e m o ry A d d re s s P o in te r, M A P . Figure 17. Control Port Timing, I²C Mode 4.14.3 SPI Mode In SPI Mode, data is clocked into the serial control data line, CDIN, by the serial Control Port clock, CCLK (see Figure 18 for the clock-to-data relationship). There is no AD0 pin. Pin CS is the chip select signal and is used to control SPI writes to the Control Port. When the device detects a high-to-low transition on the AD0/CS pin after power-up, SPI Mode will be selected. All signals are inputs and data is clocked in on the rising edge of CCLK. 4.14.3.1 SPI Write To write to the device, follow the procedure below while adhering to the Control Port Switching Specifications in Section 2. 1. Bring CS low. 2. The address byte on the CDIN pin must then be 00110000. 3. Write to the memory address pointer, MAP. This byte points to the register to be written. 4. Write the desired data to the register pointed to by the MAP. 5. If the INCR bit (see Section 4.14.1) is set to 1, repeat the previous step until all the desired registers are written, then bring CS high. 6. If the INCR bit is set to 0 and further SPI writes to other registers are desired, it is necessary to bring CS high, and follow the procedure detailed from step 1. If no further writes to other registers are desired, bring CS high. CS C C LK C H IP ADDRESS C DIN 0011000 R /W MAP MSB D A TA LSB byte 1 M A P = M em ory A d dress P oin te r Figure 18. Control Port Timing, SPI Mode byte n 30 DS618F1 CS4382A 4.15 Memory Address Pointer (MAP) 6 Reserved 0 5 Reserved 0 4 MAP4 0 3 MAP3 0 2 MAP2 0 1 MAP1 0 0 MAP0 0 7 INCR 0 4.16 INCR (Auto Map Increment Enable) Default = ‘0’ 0 - Disabled 1 - Enabled 4.16.1 MAP4-0 (Memory Address Pointer) Default = ‘00000’ DS618F1 31 CS4382A 5. REGISTER QUICK REFERENCE Addr 01h 02h 03h 04h 05h 06h Function Mode Control 1 default Mode Control 2 default Mode Control 3 default Filter Control default Invert Control default Mixing Control Pair 1 (AOUTx1) default Vol. Control A1 default Vol. Control B1 default Mixing Control Pair 2 (AOUTx2) default Vol. Control A2 default Vol. Control B2 default Mixing Control Pair 3 (AOUTx3) default Vol. Control A3 default Vol. Control B3 default Mixing Control Pair 4 (AOUTx4) default Vol. Control A4 default Vol. Control B4 default Chip Revision default 7 CPEN 0 Reserved 0 SZC1 1 Reserved 0 INV_B4 0 P1_A=B 0 A1_MUTE 0 B1_MUTE 0 P2_A=B 0 A2_MUTE 0 B2_MUTE 0 P3_A=B 0 A3_MUTE 0 B3_MUTE 0 P4_A=B 0 A4_MUTE 0 B4_MUTE 0 PART4 0 6 5 4 3 2 1 0 PDN 1 Reserved 0 MUTEC 0 RMP_DN 0 INV_A1 0 FM0 0 A1_VOL0 0 B1_VOL0 0 Reserved 0 A2_VOL0 0 B2_VOL0 0 Reserved 0 A3_VOL0 0 B3_VOL0 0 Reserved 0 A4_VOL0 0 B4_VOL0 0 REV0 x FREEZE MCLKDIV DAC4_DIS 0 0 0 DIF2 DIF1 DIF0 0 0 0 SZC0 SNGLVOL RMP_UP 0 0 0 Reserved Reserved FILT_SEL 0 0 0 INV_B3 INV_B3 INV_A3 0 0 0 P1ATAPI4 P1ATAPI3 P1ATAPI2 0 A1_VOL6 0 B1_VOL6 0 P2ATAPI4 0 A2_VOL6 0 B2_VOL6 0 P3ATAPI4 0 A3_VOL6 0 B3_VOL6 0 P4ATAPI4 0 A4_VOL6 0 B4_VOL6 0 PART3 1 1 A1_VOL5 0 B1_VOL5 0 P2ATAPI3 1 A2_VOL5 0 B2_VOL5 0 P3ATAPI3 1 A3_VOL5 0 B3_VOL5 0 P4ATAPI4 1 A4_VOL5 0 B4_VOL5 0 PART2 1 0 A1_VOL4 0 B1_VOL4 0 P2ATAPI2 0 A2_VOL4 0 B2_VOL4 0 P3ATAPI2 0 A3_VOL4 0 B3_VOL4 0 P4ATAPI2 0 A4_VOL4 0 B4_VOL4 0 PART1 1 DAC3_DIS DAC2_DIS DAC1_DIS 0 0 0 Reserved Reserved Reserved 0 0 0 MUTEC+/AMUTE Reserved 0 1 0 Reserved DEM1 DEM0 0 0 0 INV_B2 INV_A2 INV_B1 0 0 0 P1ATAPI1 P1ATAPI0 FM1 0 A1_VOL3 0 B1_VOL3 0 P2ATAPI1 0 A2_VOL3 0 B2_VOL3 0 P3ATAPI1 0 A3_VOL3 0 B3_VOL3 0 P4ATAPI1 0 A4_VOL3 0 B4_VOL3 0 PART0 0 1 A1_VOL2 0 B1_VOL2 0 P2ATAPI0 1 A2_VOL2 0 B2_VOL2 0 P3ATAPI0 1 A3_VOL2 0 B3_VOL2 0 P4ATAPI0 1 A4_VOL2 0 B4_VOL2 0 REV2 x 0 A1_VOL1 0 B1_VOL1 0 Reserved 0 A2_VOL1 0 B2_VOL1 0 Reserved 0 A3_VOL1 0 B3_VOL1 0 Reserved 0 A4_VOL1 0 B4_VOL1 0 REV1 x 07h 08h 09h 0Ah 0Bh 0Ch 0Dh 0Eh 0Fh 10h 11h 12h 32 DS618F1 CS4382A 6. REGISTER DESCRIPTION Note: All registers are read/write in I²C Mode and write only in SPI, unless otherwise noted. 6.1 Mode Control 1 (Address 01h) 7 CPEN 0 6 FREEZE 0 5 MCLKDIV 0 4 DAC4_DIS 0 3 DAC3_DIS 0 2 DAC2_DIS 0 1 DAC1_DIS 0 0 PDN 1 6.1.1 Control Port Enable (CPEN) Default = 0 0 - Disabled 1 - Enabled Function: This bit defaults to 0, allowing the device to power-up in Stand-Alone Mode. The Control Port Mode can be accessed by setting this bit to 1. This will allow the operation of the device to be controlled by the registers and the pin definitions will conform to Control Port Mode. To accomplish a clean power-up, the user should write this bit within 10 ms following the release of Reset. 6.1.2 Freeze Controls (FREEZE) Default = 0 0 - Disabled 1 - Enabled Function: This function allows modifications to be made to the registers without the changes taking effect until the FREEZE is disabled. To make multiple changes in the Control Port registers take effect simultaneously, enable the FREEZE Bit, make all register changes, then Disable the FREEZE bit. 6.1.3 Master Clock Divide Enable (MCLKDIV) Default = 0 0 - Disabled 1 - Enabled Function: The MCLKDIV bit enables a circuit which divides the externally applied MCLK signal by 2 prior to all other internal circuitry. 6.1.4 DAC Pair Disable (DACx_DIS) Default = 0 0 - DAC Pair x Enabled 1 - DAC Pair x Disabled Function: When the bit is set, the respective DAC channel pair (AOUTAx and AOUTBx) will remain in a reset state. It is advised that changes to these bits be made while the power-down (PDN) bit is enabled to eliminate the possibility of audible artifacts. DS618F1 33 CS4382A 6.1.5 Power Down (PDN) Default = 1 0 - Disabled 1 - Enabled Function: The entire device will enter a low-power state when this function is enabled, and the contents of the control registers are retained in this mode. The power-down bit defaults to ‘enabled’ on power-up and must be disabled before normal operation in Control Port Mode can occur. 6.2 Mode Control 2 (Address 02h) 6 DIF2 0 5 DIF1 0 4 DIF0 0 3 Reserved 0 2 Reserved 0 1 Reserved 0 0 Reserved 0 7 Reserved 0 6.2.1 Digital Interface Format (DIF) Default = 000 - Format 0 (Left-Justified, up to 24-bit data) Function: These bits select the interface format for the serial audio input. The Functional Mode bits determine whether PCM or DSD Mode is selected. PCM Mode: The required relationship between the Left/Right clock, serial clock and serial data is defined by the Digital Interface Format and the options are detailed in Figures 7-12. Note: While in PCM Mode, the DIF bits should only be changed when the power-down (PDN) bit is set to ensure proper switching from one mode to another. DIF2 0 0 0 0 1 1 1 1 DIF1 0 0 1 1 0 0 1 1 DIF0 0 1 0 1 0 1 0 1 DESCRIPTION Left-Justified, up to 24-bit data I²S, up to 24-bit data Right-Justified, 16-bit data Right-Justified, 24-bit data Right-Justified, 20-bit data Right-Justified, 18-bit data Reserved Reserved Table 5. Digital Interface Formats - PCM Mode Format 0 1 2 3 4 5 - FIGURE 7 8 9 10 11 12 34 DS618F1 CS4382A DSD Mode: The relationship between the oversampling ratio of the DSD audio data and the required master clock-to-DSD-data-rate is defined by the Digital Interface Format pins. DIF2 0 0 0 0 1 1 1 1 DIF1 0 0 1 1 0 0 1 1 DIFO 0 1 0 1 0 1 0 1 DESCRIPTION 64x oversampled DSD data with a 4x MCLK to DSD data rate 64x oversampled DSD data with a 6x MCLK to DSD data rate 64x oversampled DSD data with a 8x MCLK to DSD data rate 64x oversampled DSD data with a 12x MCLK to DSD data rate 128x oversampled DSD data with a 2x MCLK to DSD data rate 128x oversampled DSD data with a 3x MCLK to DSD data rate 128x oversampled DSD data with a 4x MCLK to DSD data rate 128x oversampled DSD data with a 6x MCLK to DSD data rate Table 6. Digital Interface Formats - DSD Mode 6.3 Mode Control 3 (Address 03h) 7 SZC1 1 6 SZC0 0 5 SNGLVOL 0 4 RMP_UP 0 3 MUTEC+/0 2 AMUTE 1 1 Reserved 0 0 MUTEC 0 6.3.1 Soft Ramp and Zero Cross Control (SZC) Default = 10 00 - Immediate Change 01 - Zero Cross 10 - Soft Ramp 11 - Soft Ramp on Zero Crossings Function: Immediate Change When Immediate Change is selected, all level changes will take effect immediately in one step. Zero Cross Zero Cross Enable dictates that signal level changes, either by attenuation changes or muting, will occur on a signal zero crossing to minimize audible artifacts. The requested level change will occur after a timeout period between 512 and 1024 sample periods (10.7 ms to 21.3 ms at 48 kHz sample rate) if the signal does not encounter a zero crossing. The zero cross function is independently monitored and implemented for each channel. Soft Ramp Soft Ramp allows level changes, both muting and attenuation, to be implemented by incrementally ramping, in 1/8 dB steps, from the current level to the new level at a rate of 1 dB per 8 left/right clock periods. Soft Ramp on Zero Crossing Soft Ramp and Zero Cross Enable dictates that signal level changes, either by attenuation changes or muting, will occur in 1/8 dB steps and be implemented on a signal zero crossing. The 1/8 dB level change will occur after a time-out period between 512 and 1024 sample periods (10.7 ms to 21.3 ms at 48 kHz sample rate) if the signal does not encounter a zero crossing. The zero cross function is independently monitored and implemented for each channel. DS618F1 35 CS4382A 6.3.2 Single Volume Control (SNGLVOL) Default = 0 0 - Disabled 1 - Enabled Function: The individual channel volume levels are independently controlled by their respective Volume Control Bytes when this function is disabled. The volume on all channels is determined by the A1 Channel Volume Control Byte, and the other Volume Control Bytes are ignored when this function is enabled. 6.3.3 Soft Volume Ramp-Up After Error (RMP_UP) Default = 0 0 - Disabled 1 - Enabled Function: An un-mute will be performed after a LRCK/MCLK ratio change or error, and after changing the Functional Mode. When this feature is enabled, this un-mute is affected, similar to attenuation changes, by the Soft and Zero Cross bits in the Mode Control 3 register. When disabled, an immediate un-mute is performed in these instances. Notes: For best results, it is recommended that this feature be used in conjunction with the RMP_DN bit. 6.3.4 Mutec Polarity (MUTEC+/-) Default = 0 0 - Active High 1 - Active Low Function: The active polarity of the MUTEC pin(s) is determined by this register. When set to 0 (default), the MUTEC pins are high when active. When set to 1 the MUTEC pin(s) are low when active. Note: When the onboard mute circuitry is designed for active low, the MUTEC outputs will be high (unmuted) for the period of time during reset and before this bit is enabled to 1. 6.3.5 Auto-Mute (AMUTE) Default = 1 0 - Disabled 1 - Enabled Function: The Digital-to-Analog converter output will mute following the reception of 8192 consecutive audio samples of static 0 or -1. A single sample of non-static data will release the mute. Detection and muting is done independently for each channel. The quiescent voltage on the output will be retained, and the Mute Control pin will go active during the mute period. The muting function is affected, similar to volume control changes, by the Soft and Zero Cross bits in the Mode Control 3 register. 36 DS618F1 CS4382A 6.3.6 Mutec Pin Control (MUTEC) Default = 0 0 - Two Mute control signals 1 - Single mute control signal on MUTEC1 Function: Selects how the internal mute signals are routed to the MUTEC1 and MUTEC234 pins. When set to ‘0’, a logical AND of DAC pair 1 mute control signals are output on MUTEC1 and a logical AND of the mute control signals of DAC pairs 2, 3, and 4 are output on MUTEC234. When set to ‘1’, a logical AND of all DAC pair mute control signals is output on the MUTEC1 pin, MUTEC234 will remain static. For more information on the use of the mute control function see the MUTEC1 and MUTEC234 pins in Section 5. 6.4 Filter Control (Address 04h) 6 Reserved 0 5 Reserved 0 4 FILT_SEL 0 3 Reserved 0 2 DEM1 0 1 DEM0 0 0 RMP_DN 0 7 Reserved 0 6.4.1 Interpolation Filter Select (FILT_SEL) Default = 0 0 - Fast roll-off 1 - Slow roll-off Function: This function allows the user to select whether the interpolation filter has a fast or slow roll off. For filter characteristics, please see Section 2. 6.4.2 De-Emphasis Control (DEM) Default = 00 00 - Disabled 01 - 44.1 kHz 10 - 48 kHz 11 - 32 kHz Function: Selects the appropriate digital filter to maintain the standard 15 µs/50 µs digital de-emphasis filter response at 32, 44.1 or 48 kHz sample rates. (see Figure 13) De-emphasis is only available in Single-Speed Mode. 6.4.3 Soft Ramp-Down Before Filter Mode Change (RMP_DN) Default = 0 0 - Disabled 1 - Enabled Function: If either the FILT_SEL or DEM bits are changed, the DAC will stop conversion for a period of time to change filter values. This bit selects how the data is effected prior to and after the change of the filter values. When this bit is enabled, the DAC will ramp down the volume prior to a filter-mode change and ramp DS618F1 37 CS4382A from mute to the original volume value after a filter-mode change according to the settings of the Soft and Zero Cross bits in the Mode Control 3 register. When disabled, an immediate mute and unmute is performed. Loss of clocks or a change in the FM bits will always cause an immediate mute; unmute in these conditions is affected by the RMP_UP bit. Note: For best results, it is recommended that this feature be used in conjunction with the RMP_UP bit. 6.5 Invert Control (Address 05h) 6 INV_A4 0 5 INV_B3 0 4 INV_A3 0 3 INV_B2 0 2 INV_A2 0 1 INV_B1 0 0 INV_A1 0 7 INV_B4 0 6.5.1 Invert Signal Polarity (Inv_Xx) Default = 0 0 - Disabled 1 - Enabled Function: When enabled, these bits will invert the signal polarity of their respective channels. 6.6 Mixing Control Pair 1 (Channels A1 & B1)(Address 06h) Mixing Control Pair 2 (Channels A2 & B2)(Address 09h) Mixing Control Pair 3 (Channels A3 & B3)(Address 0Ch) Mixing Control Pair 4 (Channels A4 & B4)(Address 0Fh) 6 PxATAPI4 0 5 PxATAPI3 1 4 PxATAPI2 0 3 PxATAPI1 0 2 PxATAPI0 1 1 PxFM1 0 0 PxFM0 0 7 Px_A=B 0 6.6.1 Channel A Volume = Channel B Volume (A=B) Default = 0 0 - Disabled 1 - Enabled Function: The AOUTAx and AOUTBx volume levels are independently controlled by the A and the B Channel Volume Control Bytes when this function is disabled. The volume on both AOUTAx and AOUTBx are determined by the A Channel Attenuation and Volume Control Bytes (per A-B pair), and the B Channel Bytes are ignored when this function is enabled. 38 DS618F1 CS4382A 6.6.2 ATAPI Channel Mixing and Muting (ATAPI) Default = 01001 - AOUTAx=aL, AOUTBx=bR (Stereo) Function: The CS4382A implements the channel mixing functions of the ATAPI CD-ROM specification. The ATAPI functions are applied per A-B pair. Refer to Table 7 and Figure 14 for additional information. ATAPI4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ATAPI3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 ATAPI2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 ATAPI1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 ATAPI0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 AOUTAx MUTE MUTE MUTE MUTE aR aR aR aR aL aL aL aL a[(L+R)/2] a[(L+R)/2] a[(L+R)/2] a[(L+R)/2] MUTE MUTE MUTE MUTE aR aR aR aR aL aL aL aL [(aL+bR)/2] [(aL+bR)/2] [(bL+aR)/2] [(aL+bR)/2] AOUTBx MUTE bR bL b[(L+R)/2] MUTE bR bL b[(L+R)/2] MUTE bR bL b[(L+R)/2] MUTE bR bL b[(L+R)/2] MUTE bR bL [(aL+bR)/2] MUTE bR bL [(bL+aR)/2] MUTE bR bL [(aL+bR)/2] MUTE bR bL [(aL+bR)/2] Table 7. ATAPI Decode DS618F1 39 CS4382A 6.6.3 Functional Mode (FM) Default = 00 00 - Single-Speed Mode (4 to 50 kHz sample rates) 01 - Double-Speed Mode (50 to 100 kHz sample rates) 10 - Quad-Speed Mode (100 to 200 kHz sample rates) 11 - Direct Stream Digital Mode Function: Selects the required range of input sample rates or DSD Mode. All DAC pairs are required to be set to the same functional mode setting before a speed-mode change is accepted. When DSD Mode is selected for any channel pair, all pairs switch to DSD Mode. 6.7 Volume Control (Addresses 07h, 08h, 0Ah, 0Bh, 0Dh, 0Eh) 6 xx_VOL6 0 5 xx_VOL5 0 4 xx_VOL4 0 3 xx_VOL3 0 2 xx_VOL2 0 1 xx_VOL1 0 0 xx_VOL0 0 7 xx_MUTE 0 Note: These eight registers provide individual volume and mute control for each of the eight channels. The values for “xx” in the bit fields above are as follows: Register address 07h - xx = A1 Register address 08h - xx = B1 Register address 0Ah - xx = A2 Register address 0Bh - xx = B2 Register address 0Dh - xx = A3 Register address 0Eh - xx = B3 Register address 10h - xx = A4 Register address 11h - xx = B4 6.7.1 Mute (MUTE) Default = 0 0 - Disabled 1 - Enabled Function: The Digital-to-Analog converter output will mute when enabled. The quiescent voltage on the output will be retained. The muting function is affected, similarly to attenuation changes, by the Soft and Zero Cross bits. The MUTE pins will go active during the mute period according to the MUTEC bit. 40 DS618F1 CS4382A 6.7.2 Volume Control (XX_VOL) Default = 0 (No attenuation) Function: The Digital Volume Control registers allow independent control of the signal levels in 1 dB increments from 0 to -127 dB. Volume settings are decoded as shown in Table 8. The volume changes are implemented as dictated by the Soft and Zero Cross bits. All volume settings less than -127 dB are equivalent to enabling the MUTE bit. Binary Code 0000000 0010100 0101000 0111100 1011010 Decimal Value 0 20 40 60 90 Volume Setting 0 dB -20 dB -40 dB -60 dB -90 dB Table 8. Example Digital Volume Settings 6.8 Chip Revision (Address 12h) 7 PART4 0 6 PART3 1 5 PART2 1 4 PART1 1 3 PART0 0 2 REV2 1 REV1 0 REV0 - 6.8.1 Part Number ID (PART) [Read Only] 01110 - CS4382A 6.8.2 Revision ID (REV) [Read Only] 000 - Revision A 001 - Revision B Function: This read-only register can be used to identify the model and revision number of the device. DS618F1 41 CS4382A 7. FILTER PLOTS 0 0 −20 −20 Amplitude (dB) Amplitude (dB) −40 −40 −60 −60 −80 −80 −100 −100 −120 0.4 0.5 0.6 0.7 0.8 Frequency(normalized to Fs) 0.9 1 −120 0.4 0.42 0.44 0.46 0.48 0.5 0.52 Frequency(normalized to Fs) 0.54 0.56 0.58 0.6 Figure 19. Single-Speed (fast) Stopband Rejection 0 Figure 20. Single-Speed (fast) Transition Band 0.02 −1 0.015 −2 0.01 −3 0.005 Amplitude (dB) Amplitude (dB) −4 −5 0 −6 −0.005 −7 −0.01 −8 −0.015 −9 −10 0.45 0.46 0.47 0.48 0.49 0.5 0.51 Frequency(normalized to Fs) 0.52 0.53 0.54 0.55 −0.02 0 0.05 0.1 0.15 0.2 0.25 0.3 Frequency(normalized to Fs) 0.35 0.4 0.45 0.5 Figure 21. Single-Speed (fast) Transition Band (detail) Figure 22. Single-Speed (fast) Passband Ripple 0 0 −20 −20 Amplitude (dB) −60 Amplitude (dB) −40 −40 −60 −80 −80 −100 −100 −120 0.4 0.5 0.6 0.7 0.8 Frequency(normalized to Fs) 0.9 1 −120 0.4 0.42 0.44 0.46 0.48 0.5 0.52 Frequency(normalized to Fs) 0.54 0.56 0.58 0.6 Figure 23. Single-Speed (slow) Stopband Rejection Figure 24. Single-Speed (slow) Transition Band 42 DS618F1 CS4382A 0 0.02 −1 0.015 −2 0.01 −3 0.005 Amplitude (dB) Amplitude (dB) −4 −5 0 −6 −0.005 −7 −0.01 −8 −0.015 −9 −10 0.45 0.46 0.47 0.48 0.49 0.5 0.51 Frequency(normalized to Fs) 0.52 0.53 0.54 0.55 −0.02 0 0.05 0.1 0.15 0.2 0.25 0.3 Frequency(normalized to Fs) 0.35 0.4 0.45 0.5 Figure 25. Single-Speed (slow) Transition Band (detail) Figure 26. Single-Speed (slow) Passband Ripple 0 0 20 20 Amplitude (dB) Amplitude (dB) 40 40 60 60 80 80 100 100 120 120 0.4 0.5 0.6 0.7 0.8 Frequency(normalized to Fs) 0.9 1 0.4 0.42 0.44 0.46 0.48 0.5 0.52 Frequency(normalized to Fs) 0.54 0.56 0.58 0.6 Figure 27. Double-Speed (fast) Stopband Rejection 0 Figure 28. Double-Speed (fast) Transition Band 0.02 1 0.015 2 0.01 3 Amplitude (dB) 5 Amplitude (dB) 4 0.005 0 6 0.005 7 0.01 8 9 0.015 10 0.45 0.46 0.47 0.48 0.49 0.5 0.51 Frequency(normalized to Fs) 0.52 0.53 0.54 0.55 0.02 0 0.05 0.1 0.15 0.2 0.25 0.3 Frequency(normalized to Fs) 0.35 0.4 0.45 0.5 Figure 29. Double-Speed (fast) Transition Band (detail) Figure 30. Double-Speed (fast) Passband Ripple DS618F1 43 CS4382A 0 0 20 20 Amplitude (dB) Amplitude (dB) 40 40 60 60 80 80 100 100 120 120 0.2 0.3 0.4 0.5 0.6 0.7 Frequency(normalized to Fs) 0.8 0.9 1 0.2 0.3 0.4 0.5 0.6 Frequency(normalized to Fs) 0.7 0.8 Figure 31. Double-Speed (slow) Stopband Rejection 0 Figure 32. Double-Speed (slow) Transition Band 0.02 1 0.015 2 0.01 3 0.005 Amplitude (dB) 5 Amplitude (dB) 4 0 6 0.005 7 0.01 8 0.015 9 10 0.45 0.46 0.47 0.48 0.49 0.5 0.51 Frequency(normalized to Fs) 0.52 0.53 0.54 0.55 0.02 0 0.05 0.1 0.15 0.2 Frequency(normalized to Fs) 0.25 0.3 0.35 Figure 33. Double-Speed (slow) Transition Band (detail) Figure 34. Double-Speed (slow) Passband Ripple 0 0 20 20 40 Amplitude (dB) Amplitude (dB) 40 60 60 80 80 100 100 120 120 0.2 0.3 0.4 0.5 0.6 0.7 Frequency(normalized to Fs) 0.8 0.9 1 0.2 0.3 0.4 0.5 0.6 Frequency(normalized to Fs) 0.7 0.8 Figure 35. Quad-Speed (fast) Stopband Rejection Figure 36. Quad-Speed (fast) Transition Band 44 DS618F1 CS4382A 0 0.2 1 0.15 2 0.1 3 0.05 Amplitude (dB) Amplitude (dB) 0.05 0.1 0.15 0.2 4 5 0 6 7 8 9 10 0.45 0.46 0.47 0.48 0.49 0.5 0.51 Frequency(normalized to Fs) 0.52 0.53 0.54 0.55 0 0.05 0.1 0.15 Frequency(normalized to Fs) 0.2 0.25 Figure 37. Quad-Speed (fast) Transition Band (detail) Figure 38. Quad-Speed (fast) Passband Ripple 0 0 20 20 Amplitude (dB) Amplitude (dB) 40 40 60 60 80 80 100 100 120 120 0.1 0.2 0.3 0.4 0.5 0.6 0.7 Frequency(normalized to Fs) 0.8 0.9 1 0.1 0.2 0.3 0.4 0.5 0.6 Frequency(normalized to Fs) 0.7 0.8 0.9 Figure 39. Quad-Speed (slow) Stopband Rejection 0 Figure 40. Quad-Speed (slow) Transition Band 0.02 1 0.015 2 0.01 3 0.005 Amplitude (dB) Amplitude (dB) 4 5 0 6 0.005 7 0.01 8 0.015 9 10 0.45 0.46 0.47 0.48 0.49 0.5 0.51 Frequency(normalized to Fs) 0.52 0.53 0.54 0.55 0.02 0 0.02 0.04 0.06 0.08 Frequency(normalized to Fs) 0.1 0.12 Figure 41. Quad-Speed (slow) Transition Band (detail) Figure 42. Quad-Speed (slow) Passband Ripple DS618F1 45 CS4382A 8. PARAMETER DEFINITIONS Total Harmonic Distortion + Noise (THD+N) The ratio of the rms value of the signal to the rms sum of all other spectral components over the specified bandwidth (typically 10 Hz to 20 kHz), including distortion components. Expressed in decibels. Dynamic Range The ratio of the full-scale rms value of the signal to the rms sum of all other spectral components over the specified bandwidth. Dynamic range is a signal-to-noise measurement over the specified bandwidth made with a -60 dBFS signal. 60 dB is then added to the resulting measurement to refer the measurement to full scale. This technique ensures that the distortion components are below the noise level and do not affect the measurement. This measurement technique has been accepted by the Audio Engineering Society, AES17-1991, and the Electronic Industries Association of Japan, EIAJ CP-307. Interchannel Isolation A measure of crosstalk between the left and right channels. Measured for each channel at the converter's output with all zeros to the input under test and a full-scale signal applied to the other channel. Units in decibels. Interchannel Gain Mismatch The gain difference between left and right channels. Units in decibels. Gain Error The deviation from the nominal full-scale analog output for a full-scale digital input. Gain Drift The change in gain value with temperature. Units in ppm/°C. 46 DS618F1 CS4382A 9. PACKAGE DIMENSIONS 48L LQFP PACKAGE DRAWING E E1 D D1 1 e ∝ B A A1 L INCHES NOM 0.055 0.004 0.009 0.354 0.28 0.354 0.28 0.020 0.24 4° DIM A A1 B D D1 E E1 e* L µ MIN --0.002 0.007 0.343 0.272 0.343 0.272 0.016 0.018 0.000° MAX 0.063 0.006 0.011 0.366 0.280 0.366 0.280 0.024 0.030 7.000° MIN --0.05 0.17 8.70 6.90 8.70 6.90 0.40 0.45 0.00° MILLIMETERS NOM 1.40 0.10 0.22 9.0 BSC 7.0 BSC 9.0 BSC 7.0 BSC 0.50 BSC 0.60 4° MAX 1.60 0.15 0.27 9.30 7.10 9.30 7.10 0.60 0.75 7.00° * Nominal pin pitch is 0.50 mm Controlling dimension is mm. JEDEC Designation: MS022 DS618F1 47 CS4382A 10.ORDERING INFORMATION Product CS4382A CDB4382A Description 114 dB, 192 kHz 8channel D/A Converter Package Pb-Free 48-pin LQFP YES - Grade Temp Range Container Order # CS4382A-CQZ CS4382A-CQZR CS4382A-DQZ CS4382A-DQZR CDB4382A CS4382A Evaluation Board Tray Commercial -40°C to +85°C Tape & Reel Tray Automotive -40°C to +105°C Tape & Reel - 11.REFERENCES 1. How to Achieve Optimum Performance from Delta-Sigma A/D & D/A Converters, by Steven Harris. Paper presented at the 93rd Convention of the Audio Engineering Society, October 1992. 2. CDB4382A data sheet, available at http://www.cirrus.com. 3. Design Notes for a 2-Pole Filter with Differential Input, by Steven Green. Cirrus Logic Application Note AN48. 4. The I²C Bus Specification: Version 2.0, Philips Semiconductors, December 1998 http://www.semiconductors.philips.com. 48 DS618F1 CS4382A 12.REVISION HISTORY Release PP1 PP2 Changes Updated output impedance spec in “DAC Analog Characteristics - Automotive (-DQZ)” on page 10. Improved interchannel isolation spec in “DAC Analog Characteristics - Automotive (-DQZ)” on page 10. Corrected package type. Corrected register description in “DAC Pair Disable (DACx_DIS)” on page 33. Added note to “Digital Interface Format (DIF)” on page 34. Added PCM mode format changeable in reset only to “Mode Select” on page 21. Updated ambient operating temperature range for Commercial and Automotive grade. Updated “DAC Analog Characteristics - Commercial (-CQZ)” on page 9. Updated “DAC Analog Characteristics - Automotive (-DQZ)” on page 10. Updated “Power and Thermal Characteristics” on page 11. Updated “Digital Characteristics” on page 14. Updated Legal Information under “IMPORTANT NOTICE” on page 50 F1 DS618F1 49 CS4382A Contacting Cirrus Logic Support For all product questions and inquiries, contact a Cirrus Logic Sales Representative. To find the one nearest you, go to www.cirrus.com. IMPORTANT NOTICE Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual property rights. 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Direct Stream Digital is a registered trademark of Sony Kabushiki Kaisha TA Sony Corporation. DSD is a trademark of Sony Kabushiki Kaisha TA Sony Corporation 50 DS618F1