MAX9850ETI+TGC1

19-3454; Rev 3; 4/06 KIT ATION EVALU LE B A IL A AV Stereo Audio DAC with DirectDrive Headphone Amplifier The MAX9850 is a low-power, high-performance stereo audio DAC with an integrated DirectDrive headphone amplifier. The MAX9850 is designed to meet the board space and performance requirements of portable devices such as cell phones and MP3 and portable DVD players. The MAX9850 uses Maxim’s DirectDrive headphone technology that produces a ground-biased analog audio output from a single supply, which allows for driving the headphones directly from the amplifier outputs without large DC-blocking capacitors. This feature saves board space, provides higher click/pop suppression, and improves low-frequency (bass) response. The architecture does not require the headphone jack to be biased to a DC voltage and thus allows for a conventional, grounded chassis design. The MAX9850’s flexible clocking circuitry utilizes any available system clock up to 40MHz, eliminating the need for an external PLL and multiple crystal oscillators. The DAC supports a wide range of sample rates from 8kHz to 48kHz in both master and slave modes, making the MAX9850 the easiest to use and most versatile audio DAC available. It can also be operated like traditional synchronous DACs, at any integer-oversampling ratio. The audio DAC receives input data over a flexible 3-wire interface that supports left-justified, right-justified audio data, or I2S-compatible audio data. Stereo audio line inputs are provided to either mix analog audio with the digital input stream, or to drive the headphone outputs directly. Mode settings, headphone amplifier volume controls, and shutdown for both the headphone and line outputs are programmed through a 2-wire, I2C-compatible interface. The MAX9850 is fully specified over the -40°C to +85°C extended temperature range and is available in a lowprofile, 28-pin thin QFN package (5mm x 5mm x 0.8mm). Features ♦ 1.8V to 3.6V Single-Supply Operation ♦ 30mW Stereo Headphone Output Power with 1.8V Supply ♦ DirectDrive Outputs Eliminate DC-Blocking Capacitors ♦ 91dB PSRR at 1kHz ♦ Any Master Clock Up to 40MHz ♦ Flexible I2S-Compatible Digital Audio Interface ♦ I2C Headphone Volume and Mute Control ♦ Stereo Line Inputs and Outputs ♦ Clickless/Popless Operation ♦ 2-Wire (I2C)-Compatible Control Interface ♦ Available in 28-Pin Thin QFN Package Ordering Information PART TEMP RANGE PIN-PACKAGE MAX9850ETI+ -40°C to +85°C 28 TQFN-EP** PKG CODE T2855-6 **EP = Exposed pad. +Denotes lead-free package. Pin Configuration appears at end of data sheet. Block Diagram MCLK 1.8V TO 3.6V INR Applications DIGITAL PLL MP3/Portable Multimedia Players Cell Phones/Smart Phones Portable DVD Players SDIN BCLK LRCLK SDA SCL ADD GPIO OUTR MAX9850 DAC DIGITAL AUDIO DAC + + HPR HPL OUTL I 2C LINE OUT LINE OUT INL ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX9850 General Description MAX9850 Stereo Audio DAC with DirectDrive Headphone Amplifier ABSOLUTE MAXIMUM RATINGS (Voltages with respect to AGND.) DVDD, AVDD, PVDD ..................................................-0.3V to +4V AVDD Referenced to PVDD ....................................-0.3V to +0.3V SVSS, PVSS ...............................................................-4V to +0.3V SVSS Referenced to PVSS .....................................-0.3V to +0.3V DGND, PGND........................................................-0.3V to +0.3V BCLK, LRCLK, HPS, SDIN.......................-0.3V to (DVDD + 0.3V) GPIO, MCLK.............................................................-0.3V to +4V REF, PREG ...............................................-0.3V to (AVDD + 0.3V) NREG ........................................................+0.3V to (SVSS - 0.3V) SDA, SCL, ADD ........................................................-0.3V to +4V INL, INR .......................................................................-2V to +2V HPR, HPL.....................................(SVSS - 0.3V) to (AVDD + 0.3V) OUTL, OUTR .............................(NREG - 0.3V) to (PREG + 0.3V) C1N ............................................(PVSS - 0.3V) to (PGND + 0.3V) C1P ............................................(PGND - 0.3V) to (PVDD + 0.3V) Current Into/Out of Any Pin ...............................................100mA Duration of HPL, HPR, OUTL, OUTR Short Circuit to AGND .................................Continuous Continuous Power Dissipation (TA = +70°C) 28-Pin Thin QFN (derate 35.7mW/°C above +70°C) .....2857mW Junction Temperature ......................................................+150°C Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (DVDD = AVDD = PVDD = 3.0V, AGND = DGND = PGND = 0V, C1 = 0.47µF, C2 = 2.2µF, CNREG = CPREG = CREF = 1µF to AGND, RLOAD_HP = 32Ω to AGND, RLOAD_OUT = 10kΩ to AGND, fLRCLK = 48kHz, fMCLK = 12.288MHz, volume set to -9.5dB, TA = TMIN to TMAX, unless otherwise noted. Typical specifications at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL Analog Supply Voltage AVDD, PVDD Digital Supply Voltage DVDD Analog Supply Current Digital Supply Current AIDD DIDD CONDITIONS AVDD = PVDD MIN TYP MAX UNITS 1.8 3.6 V 1.8 3.6 V Full operation (Note 2), no headphone or line output load AVDD = 1.8V 5.5 AVDD = 3.0V 5.9 Full operation (Note 2), headphones disabled AVDD = 1.8V 3.5 AVDD = 3.0V 3.75 Full operation (Note 2), no line output load DVDD = 1.8V 2.1 DVDD = 3.0V 3.8 7.7 mA 5.3 2.9 mA Analog Shutdown Current AISHDN IAVDD + IPVDD, AVDD = PVDD = 1.8V 1.5 10 µA Digital Shutdown Current DISHDN Static digital interface, DVDD = 1.8V 0.3 5 µA Shutdown to Full Operation (Note 2) tON 1.3 ms Power-On to Full Operation (Note 2) tPON 1.4 ms DAC PERFORMANCE/LINE OUTPUTS (Note 3) 0dBFS Output Voltage Dynamic Range (Note 4) Signal-to-Noise Ratio (Note 5) 2 VOUT_FS DR SNR 1.85 AVDD = 3.0V AVDD = 1.8V 1.95 87.5 82 87.5 Unweighted 88 A-weighted 91 AVDD = 1.8V, unweighted 88 AVDD = 1.8V, A-weighted 91 _______________________________________________________________________________________ 2.05 VP-P dB dB Stereo Audio DAC with DirectDrive Headphone Amplifier (DVDD = AVDD = PVDD = 3.0V, AGND = DGND = PGND = 0V, C1 = 0.47µF, C2 = 2.2µF, CNREG = CPREG = CREF = 1µF to AGND, RLOAD_HP = 32Ω to AGND, RLOAD_OUT = 10kΩ to AGND, fLRCLK = 48kHz, fMCLK = 12.288MHz, volume set to -9.5dB, TA = TMIN to TMAX, unless otherwise noted. Typical specifications at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN 0dBFS Total Harmonic Distortion Plus Noise THD+N Line Output Offset Voltage VOS_LINE Channel-to-Channel Gain Matching ΔAV/AV Power-Supply Rejection Ratio Crosstalk PSRR XTALK Sampling Frequency Range MCLK Frequency fIN = 984.375Hz TYP MAX UNITS 87 -60dBFS 27.5 AVDD = 1.8V, 0dBFS -81 AVDD = 1.8V, -60dBFS -27.5 -22 0 +15 -15 OUTL to OUTR, OUTR to OUTL dB ±0.04 VRIPPLE = 100mVP-P, fIN = 1kHz, applied to AVDD and PVDD 87 VRIPPLE = 100mVP-P, fIN = 20kHz, applied to AVDD and PVDD 67 mV dB dB fOUT = 1kHz, VOUT = 2VP-P (OUTL to OUTR) or (OUTR to OUTL) -105 dB fS 8 48 kHz fMCLK 8.448 40 MHz DAC 8x INTERPOLATION FILTER PB To -1dB corner 0 0.48 x fS kHz Frequency Response FR 10Hz to 20kHz -0.1 +0.1 dB Stopband Attenuation SBA Stopband Frequency SB Passband Frequency 58 dB 0.58 x fS 7.42 x fS kHz VIN_LINE -1 +1 V Attenuation greater than SBA LINE INPUTS (INL, INR) Line Input Voltage IN_ to OUT_ Gain Line Input Bias Voltage INL and INR Input Resistance AV_LINE -1.05 -1 -0.95 V/V VBIAS_LINE -15 0 +15 mV RIN_LINE 10 22 kΩ INTERNAL REGULATORS (NREG, PREG) PREG Output Voltage VPREG 1.60 V NREG Output Voltage VNREG -1.15 V VREF 1.23 V REF Output Voltage _______________________________________________________________________________________ 3 MAX9850 ELECTRICAL CHARACTERISTICS (continued) MAX9850 Stereo Audio DAC with DirectDrive Headphone Amplifier ELECTRICAL CHARACTERISTICS (continued) (DVDD = AVDD = PVDD = 3.0V, AGND = DGND = PGND = 0V, C1 = 0.47µF, C2 = 2.2µF, CNREG = CPREG = CREF = 1µF to AGND, RLOAD_HP = 32Ω to AGND, RLOAD_OUT = 10kΩ to AGND, fLRCLK = 48kHz, fMCLK = 12.288MHz, volume set to -9.5dB, TA = TMIN to TMAX, unless otherwise noted. Typical specifications at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS HEADPHONE OUTPUTS (HPL, HPR) RL = 16Ω AVDD = 3.0V Output Power OUT RL = 32Ω AVDD = 3.0V THD+N = 1% fIN = 1kHz, headphone volume = +6dB Line In to HP Output Voltage Gain Total Harmonic Distortion Plus Noise Signal-to-Noise Ratio (Note 6) Power-Supply Rejection Ratio Headphone Output Offset Voltage 25 1.23 1.30 VRMS AV_HP Volume = +3dB, HP unloaded 1.34 1.41 1.48 V/V THD+N SNR PSRR VOS_HP CL Crosstalk XTALK Channel-to-Channel Gain Matching ΔAV/AV 4 15 1.16 SR Volume Control Range mW 30 Volume = +5dB, HP unloaded Maximum Capacitive Load Charge-Pump Operating Frequency Range 65 VOUT_FS Slew Rate Internal Charge-Pump Oscillator Frequency 40 RL = 16Ω AVDD = 1.8V RL = 32Ω AVDD = 1.8V Full-Scale Headphone Amplifier Output Voltage 95 RL = 32Ω, POUT = 60mW, fIN = 1kHz -94 RL = 16Ω, POUT = 60mW, fIN = 1kHz -90 Unweighted 88 A-weighted 90 AVDD = 1.8V, unweighted 88 AVDD = 1.8V, A-weighted 91 VRIPPLE = 100mVP-P, frequency = 1kHz, applied to AVDD and PVDD 91 VRIPPLE = 100mVP-P, frequency = 20kHz, applied to AVDD and PVDD 72 Volume = -11.5dB dB dB dB TA = +25°C -15 +15 TA = TMIN to TMAX -25 +25 mV 0.47 V/µs No sustained oscillations 150 pF RHP = 32Ω, POUT = 3.5mW, fIN = 1kHz (HPL to HPR) or (HPR to HPL) -85 dB ±0.05 dB fCP 550 Charge-pump clock derived from MCLK 667 775 kHz 550 775 kHz -73.5 +6.0 dB _______________________________________________________________________________________ Stereo Audio DAC with DirectDrive Headphone Amplifier (DVDD = AVDD = PVDD = 3.0V, AGND = DGND = PGND = 0V, C1 = 0.47µF, C2 = 2.2µF, CNREG = CPREG = CREF = 1µF to AGND, RLOAD_HP = 32Ω to AGND, RLOAD_OUT = 10kΩ to AGND, fLRCLK = 48kHz, fMCLK = 12.288MHz, volume set to -9.5dB, TA = TMIN to TMAX, unless otherwise noted. Typical specifications at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN Mute Attenuation TYP MAX 100 UNITS dB DIGITAL INPUTS (GPIO, SCL, SDA, BCLK, LRCLK, SDIN, ADD, MCLK) Input High Voltage VIH Input Low Voltage VIL Input Leakage Current IIH, IIL 0.8 x DVDD VIH = DVDD, VIL = DGND -10 Input Hysteresis Input Capacitance V CIN 0.2 x DVDD V +10 µA 0.09 x DVDD V 10 pF OPEN-DRAIN DIGITAL OUTPUTS (GPIO, SDA) Output-High Leakage Current IOH VOH = DVDD (Note 7) Output Low Voltage VOL IOL = 3mA 1 DVDD > 2V 0.4 DVDD < 2V 0.2 x DVDD µA V CMOS DIGITAL OUTPUTS (BCLK, LRCLK) Output High Voltage VOH IOH = 1mA Output Low Voltage VOL IOL = 1mA DVDD 0.4 V 0.4 V HEADPHONE SENSE INPUT (HPS) Input High Voltage VIH Input Low Voltage VIL Input-High Leakage Current IIH Input-Low Leakage Current IIL Input Hysteresis 0.7 x DVDD V 0.25 x DVDD Full shutdown, VIH = DVDD 400 Normal operation, VIH = DVDD 1 Full shutdown, VIL = DGND 1 Normal operation, VIL = DGND 100 0.05 x DVDD V µA µA V _______________________________________________________________________________________ 5 MAX9850 ELECTRICAL CHARACTERISTICS (continued) MAX9850 Stereo Audio DAC with DirectDrive Headphone Amplifier TIMING CHARACTERISTICS (DVDD = AVDD = PVDD = 3.0V, AGND = DGND = PGND = 0V, C1 = 0.47µF, C2 = 2.2µF, CNREG = CPREG = CREF = 1µF to AGND, RLOAD_HP = 32Ω to AGND, RLOAD_LINE = 10kΩ to AGND, fLRCLK = 48kHz, fMCLK = 12.288MHz, volume set to -9.5dB, TA = TMIN to TMAX, unless otherwise noted. Typical specifications at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 400 kHz I2C TIMING Serial Clock Frequency fSCL 0 Bus Free Time Between STOP and START Conditions tBUF 1.3 µs Hold Time (Repeated) START Condition tHD, STA 0.6 µs SCL Pulse-Width Low tLOW 1.3 µs SCL Pulse-Width High tHIGH 0.6 µs Repeated START Condition Setup Time tSU, STA 0.6 µs Data Hold Time tHD, DAT 0 Data Setup Time tSU, DAT 100 Bus Capacitance CB SDA and SCL Receiving Rise Time (Note 8) SDA and SCL Receiving Fall Time (Note 8) SDA Transmitting Fall Time (Note 8) Setup Time for STOP Condition Pulse Width of Suppressed Spike 900 ns ns 400 pF tR 20 + 0.1CB 300 ns tF 20 + 0.1CB 300 ns DVDD = 1.8V, TA = +25°C 20 + 0.1CB 250 DVDD = 3.6V, TA = +25°C 20 + 0.05CB 250 tF ns tSU, STO 0.6 tSP 0 µs tBCLK 3x 1 / fICLK ns tBCLK_PW 0.35 x tBCLK ns 50 ns DIGITAL AUDIO TIMING BCLK Period (Note 9) Low or High BCLK Pulse Width BCLK and LRCLK Rise Time tR Master mode, CLOAD = 15pF 1 ns BCLK and LRCLK Fall Time tF Master mode, CLOAD = 15pF 1 ns SDIN or LRCLK to BCLK Rising Setup Time tDBSU, tBWSU SDIN or LRCLK to BCLK Rising Hold Time tDBH, tBWBH Note 1: Note 2: Note 3: Note 4: 6 30 ns DVDD = 1.8V 0 DVDD = 3.6V 5 ns The MAX9850 is 100% production tested at TA = +25°C and is guaranteed by design for TA = TMIN to TMAX. Full operation is defined as clocking all zeros into the DAC while the DAC, headphone outputs, and line outputs are all enabled. DAC performance specifications measured using the line outputs, OUTL and OUTR. Dynamic range is defined as the SNR of a 1kHz, -60dBFS input signal measured with an A-weighted filter, then normalized to full scale (+60dB). _______________________________________________________________________________________ Stereo Audio DAC with DirectDrive Headphone Amplifier MAX9850 Note 5: Note 6: Note 7: Note 8: Note 9: DAC SNR measured from DAC inputs to OUTL and OUTR. Headphone amplifier SNR measured from line inputs to headphone outputs. GPIO is 100kΩ to ground when DVDD < VOH < 3.6V. CB is in pF. fICLK derived by dividing fMCLK by 1, 2, 3, or 4. See the Registers and Bit Descriptions section. TYPICAL POWER DISSIPATION AT AVDD = 1.8V (No Headphone/Line Output Load) AVDD POWER DVDD POWER PVDD POWER Full Operation (Note 1) MODE 4.93mW 3.76mW 5.00mW 13.70mW DAC to Line Outputs, Headphones Disabled 3.11mW 3.76mW 3.22mW 10.10mW Line Inputs to Line Outputs and Headphone Outputs, DAC Disabled 3.22mW 0.085mW 3.40mW 6.71mW Line Inputs to Line Outputs, DAC and Headphones Disabled 1.39mW 0.085mW 1.61mW 3.08mW 2.7µW 0.5µW