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PCM2906BDB

PCM2906BDB

  • 厂商:

    BURR-BROWN(德州仪器)

  • 封装:

    SSOP28_208MIL

  • 描述:

    IC STEREO CODEC 16B USB 28SSOP

  • 数据手册
  • 价格&库存
PCM2906BDB 数据手册
Not Recommended for New Designs PCM2906B Burr-Brown Audio www.ti.com ........................................................................................................................................................................................... SLES227 – DECEMBER 2008 STEREO AUDIO CODEC WITH USB INTERFACE, SINGLE-ENDED ANALOG INPUT/OUTPUT, AND S/PDIF FEATURES 1 • On-Chip USB Interface: – With Full-Speed Transceivers – Fully Compliant with USB 2.0 Specification – Certified by USB-IF – Partially Programmable Descriptors (1) – USB Adaptive Mode for Playback – USB Asynchronous Mode for Record – Bus Powered • 16-Bit Delta-Sigma ADC and DAC • Sampling Rate: – DAC: 32, 44.1, 48 kHz – ADC: 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz • On-Chip Clock Generator with Single 12-MHz Clock Source • S/PDIF Input/Output • Single Power Supply: – 5 V Typical (VBUS) • Stereo ADC: – Analog Performance at VBUS = 5 V: – THD+N = 0.01% – SNR = 89 dB – Dynamic Range = 89 dB – Decimation Digital Filter: – Passband Ripple = ±0.05 dB – Stop-Band Attenuation = –65 dB – Single-Ended Voltage Input – Antialiasing Filter Included – Digital HPF Included • 234 (1) The descriptor can be modified by changing a mask. • • Stereo DAC: – Analog Performance at VBUS = 5 V: – THD+N = 0.005% – SNR = 96 dB – Dynamic Range = 93 dB – Oversampling Digital Filter: – Passband Ripple = ±0.1 dB – Stop-Band Attenuation = –43 dB – Single-Ended Voltage Output – Analog LPF Included Multifunctions: – Human Interface Device (HID) Function: – Volume and Mute Controls – Suspend Flag Function 28-Pin SSOP Package APPLICATIONS • • • • USB USB USB USB Audio Speaker Headset Monitor Audio Interface Box DESCRIPTION The PCM2906B is Texas Instruments' single-chip, USB, stereo audio codec with a USB-compliant full-speed protocol controller and S/PDIF. The USB protocol controller requires no software code, but the USB descriptors can be modified in some areas (for example, vendor ID and/or product ID). The PCM2906B employs SpAct™ architecture, TI's unique system that recovers the audio clock from USB packet data. On-chip analog PLLs with SpAct enable playback and record with low clock jitter as well as independent playback and record sampling rates. 1 2 3 4 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. SpAct is a trademark of Texas Instruments. System Two, Audio Precision are trademarks of Audio Precision, Inc. All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2008, Texas Instruments Incorporated PCM2906B Not Recommended for New Designs SLES227 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. PACKAGING/ORDERING INFORMATION (1) PRODUCT PACKAGE-LEAD PACKAGE DESIGNATOR PCM2906BDB SSOP-28 DB (1) SPECIFIED TEMPERATURE RANGE PACKAGE MARKING –25°C to +85°C PCM2906B ORDERING NUMBER TRANSPORT MEDIA, QUANTITY PCM2906BDB Rails, 47 PCM2906BDBR Tape and Reel, 2000 For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI website at www.ti.com. ABSOLUTE MAXIMUM RATINGS (1) Over operating free-air temperature range (unless otherwise noted). PARAMETER Supply voltage, VBUS Ground voltage differences, AGNDC, AGNDP, AGNDX, DGND, DGNDU Digital input voltage Analog input voltage SEL0, SEL1, DIN PCM2906B UNIT –0.3 to 6.5 V ±0.1 V –0.3 to 6.5 D+, D–, HID0, HID1, HID2, XTI, XTO, DOUT, SSPND –0.3 to (VDDI + 0.3) < 4 VINL, VINR, VCOM, VOUTR, VOUTL –0.3 to (VCCCI + 0.3) < 4 VCCCI, VCCP1I, VCCP2I, VCCXI, VDDI –0.3 to 4 Input current (any pins except supplies) V V ±10 mA Ambient temperature under bias –40 to +125 °C Storage temperature, Tstg –55 to +150 °C Junction temperature, TJ +150 °C Lead temperature (soldering, 5s) +260 °C Package temperature (IR reflow, peak) +250 °C (1) 2 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 under is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B PCM2906B Not Recommended for New Designs www.ti.com ........................................................................................................................................................................................... SLES227 – DECEMBER 2008 ELECTRICAL CHARACTERISTICS All specifications at TA = +25°C, VBUS, = 5 V, fS = 44.1 kHz, fIN = 1 kHz, and 16-bit data (unless otherwise noted). PCM2906B PARAMETER TEST CONDITIONS MIN TYP MAX UNIT DIGITAL INPUT/OUTPUT Host interface Apply USB Revision 2.0, full speed Audio data format USB isochronous data format INPUT LOGIC VIH (1) 2 3.3 VIL (1) 0.8 VIH (2) (3) VIL (2) (3) VIH (4) 2.52 3.3 0.9 Input logic level 2 5.25 2.52 5.25 VIL (4) 0.8 VIH (5) VIL (5) 0.9 IIH (1) (2) (4) VIN = 3.3 V ±10 IIL (1) (2) (4) VIN = 0 V ±10 IIH (3) IIL (3) VDC Input logic current VIN = 3.3 V 50 VIN = 0 V 80 µA ±10 IIH (5) VIN = 3.3 V IIL (5) VIN = 0 V 65 100 ±10 OUTPUT LOGIC VOH (1) 2.8 VOL (1) VOH 0.3 (6) VOL (6) Output logic level VOH (7) VOL IOH = –4 mA IOH = –2 mA (7) 2.8 IOL = 4 mA 0.5 VDC 2.8 IOL = 2 mA 0.5 CLOCK FREQUENCY Input clock frequency, XTI (1) (2) (3) (4) (5) (6) (7) 11.994 12 12.006 MHz Pins 1, 2: D+, D–. Pin 21: XTI. Pins 5, 6, 7: HID0, HID1, HID2. Pins 8, 9: SEL0, SEL1. Pin 24: DIN. Pin 25: DOUT. Pin 28: SSPND. Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B 3 PCM2906B Not Recommended for New Designs SLES227 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS (continued) All specifications at TA = +25°C, VBUS, = 5 V, fS = 44.1 kHz, fIN = 1 kHz, and 16-bit data (unless otherwise noted). PCM2906B PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ADC CHARACTERISTICS Resolution Audio data channel 8, 16 Bits 1, 2 Channel ADC Clock Frequency fs Sampling frequency 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz ADC DC Accuracy Gain mismatch, channel-to-channel ±1 ±5 % of FSR Gain error ±2 ±10 % of FSR Bipolar zero error ±0 % of FSR ADC Dynamic Performance (8) VIN = –1 dB (9), VCCCI = 3.67 V THD+N Total harmonic distortion plus noise 0.01 VIN = –1 dB (10) VIN = –60 dB SNR 0.02 % 0.1 % 5 % Dynamic range A-weighted 81 89 dB Signal-to-noise ratio A-weighted 81 89 dB 80 85 dB Input voltage 0.6 VCCCI VPP Center voltage 0.5 VCCCI Channel separation Analog Input Input impedance Antialiasing filter frequency response –3 dB fIN = 20 kHz V 30 kΩ 150 kHz –0.08 dB ADC Digital Filter Performance Passband Stop band Stop-band attenuation –65 Delay time HPF frequency response Hz ±0.05 dB Hz Passband ripple td 0.454 fs 0.583 fs dB 17.4/fs –3 dB 0.078fs/1000 s Hz (8) fIN = 1 kHz, using the System Two™ audio measurement system by Audio Precision™ in RMS mode with 20-kHz LPF, 400-Hz HPF in calculation. (9) Using external voltage regulator for VCCCI (as shown in Figure 36). (10) Using internal voltage regulator for VCCCI (as shown in Figure 37). 4 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B PCM2906B Not Recommended for New Designs www.ti.com ........................................................................................................................................................................................... SLES227 – DECEMBER 2008 ELECTRICAL CHARACTERISTICS (continued) All specifications at TA = +25°C, VBUS, = 5 V, fS = 44.1 kHz, fIN = 1 kHz, and 16-bit data (unless otherwise noted). PCM2906B PARAMETER TEST CONDITIONS MIN TYP MAX UNIT DAC CHARACTERISTICS Resolution Audio data channel 8, 16 Bits 1, 2 Channel DAC Clock Frequency fs Sampling frequency 32, 44.1, 48 kHz DAC DC Accuracy Gain mismatch, channel-to-channel ±1 ±5 % of FSR Gain error ±2 ±10 % of FSR Bipolar zero error ±2 % of FSR DAC Dynamic Performance (11) THD+N SNR Total harmonic distortion plus noise VOUT = 0 dB 0.005 Dynamic range EIAJ, A-weighted Signal-to-noise ratio EIAJ, A-weighted VOUT = –60 dB Channel separation 0.016 % 3 % 87 93 dB 90 96 dB 86 92 dB 0.6 VCCCI VPP Analog Output VO Output voltage Center voltage Load impedance LPF frequency response 0.5 VCCCI AC coupling V 10 –3 dB f = 20 kHz kΩ 250 kHz –0.03 dB DAC Digital Filter Performance Passband Stop band Hz ±0.1 dB 0.555 fs Hz Passband ripple Stop-band attenuation td 0.445 fs –43 Delay time dB 14.3 fs s POWER-SUPPLY REQUIREMENTS VBUS Voltage range Supply current PD Power dissipation 4.35 ADC, DAC operation Suspend mode (12) VDC 67 mA 352 mW 280 (12) Internal power-supply voltage (13) 5.25 µA 250 ADC, DAC operation Suspend mode 5 56 1.25 3.1 3.3 mW 3.5 VDC +85 °C TEMPERATURE RANGE Operating temperature range θJA Thermal resistance –25 28-pin SSOP 100 °C/W (11) fOUT = 1 kHz, using the System Two audio measurement system by Audio Precision in RMS mode with 20-kHz LPF, 400-Hz HPF. (12) In USB suspend state. (13) Pins 10, 17, 19, 23, 27: VCCCI, VCCP1I, VCCP2I, VCCXI, VDDI. Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B 5 PCM2906B Not Recommended for New Designs SLES227 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com PIN ASSIGNMENTS DB PACKAGE SSOP-28 (TOP VIEW) D+ D– VBUS DGNDU HID0 HID1 HID2 SEL0 SEL1 VCCCI AGNDC VINL VINR VCOM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 PCM2906B 28 27 26 25 24 23 22 21 20 19 18 17 16 15 SSPND VDDI DGND DOUT DIN VCCXI AGNDX XTI XTO VCCP2I AGNDP VCCP1I VOUTL VOUTR P0007-05 Table 1. TERMINAL FUNCTIONS TERMINAL NAME NO. I/O AGNDC 11 – Analog ground for codec DESCRIPTION AGNDP 18 – Analog ground for PLL AGNDX 22 – D– 2 I/O USB differential input/output minus (1) D+ 1 I/O USB differential input/output plus (1) DGND 26 – Digital ground DGNDU 4 – Digital ground for USB transceiver DIN 24 I S/PDIF input (2) DOUT 25 O S/PDIF output HID0 5 I HID key state input (mute), active-high (3) HID1 6 I HID key state input (volume up), active-high (3) HID2 7 I HID key state input (volume down), active-high (3) SEL0 8 I Must be set to high (4) SEL1 9 I Must be set to high (4) SSPND 28 O Suspend flag, active-low (Low: suspend, High: operational) VBUS 3 – Connect to USB power (VBUS) VCCCI 10 – Internal analog power supply for codec (5) VCCP1I 17 – Internal analog power supply for PLL (5) VCCP2I 19 – Internal analog power supply for PLL (5) VCCXI 23 – Internal analog power supply for oscillator (5) VCOM 14 – Common for ADC/DAC (VCCCI/2) (5) VDDI 27 – Internal digital power supply (5) Analog ground for oscillator VINL 12 I ADC analog input for L-channel VINR 13 I ADC analog input for R-channel VOUTL 16 O DAC analog output for L-channel VOUTR 15 O DAC analog output for R-channel XTI 21 I Crystal oscillator input (6) XTO 20 O Crystal oscillator output (1) (2) (3) (4) (5) (6) 6 LV-TTL level. 3.3-V CMOS-level input with internal pulldown, 5-V tolerant. 3.3-V CMOS-level input with internal pulldown. This pin informs the PC of serviceable control signals such as mute, volume up, or volume down, which have no direct connection with the internal DAC or ADC. See the Interface #3 and End-Points sections. TTL Schmitt trigger, 5-V tolerant. Connect a decoupling capacitor to GND. 3.3-V CMOS-level input. Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B PCM2906B Not Recommended for New Designs www.ti.com ........................................................................................................................................................................................... SLES227 – DECEMBER 2008 FUNCTIONAL BLOCK DIAGRAM VCCCI VCCP1I VCCP2I VCCXI VDDI AGNDC AGNDP AGNDX DGND DGNDU 5-V to 3.3-V Voltage Regulator Lock DIN Power Manager SSPND S/PDIF Decoder VBUS VINL ISO-In End-Point USB SIE VINR Analog PLL VCOM Selector Analog PLL XCVR FIFO ADC D+ D– Control End-Point SEL0 SEL1 VOUTL FIFO DAC ISO-Out End-Point VOUTR DOUT HID0 HID1 HID2 HID End-Point S/PDIF Encoder USB Protocol Controller 96 MHz PLL (´8) XTI 12 MHz Tracker (SpAct) XTO B0239-01 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B 7 PCM2906B Not Recommended for New Designs SLES227 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com BLOCK DIAGRAM OF ANALOG FRONT-END (RIGHT CHANNEL) 4.7 mF + VINR 30 kW – 13 – (+) + + (–) Delta-Sigma Modulator VCOM 14 + (VCCCI/2) 10 mF Reference S0011-06 8 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B PCM2906B Not Recommended for New Designs www.ti.com ........................................................................................................................................................................................... SLES227 – DECEMBER 2008 TYPICAL CHARACTERISTICS: ADC All specifications at TA = +25°C, VBUS = 5 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, using REG103xA-A, unless otherwise noted. TOTAL HARMONIC DISTORTION + NOISE AT –1 dB vs FREE-AIR TEMPERATURE DYNAMIC RANGE and SNR vs FREE-AIR TEMPERATURE 95 0.009 Dynamic Range and SNR – dB THD+N – Total Harmonic Distortion + Noise – % 0.010 0.008 0.007 0.006 0.005 91 Dynamic Range 89 SNR 87 0.004 0.003 −50 −25 0 25 50 75 85 −50 100 TA – Free-Air Temperature – °C −25 0 25 50 75 TA – Free-Air Temperature – °C G001 Figure 1. Figure 2. TOTAL HARMONIC DISTORTION + NOISE AT –1 dB vs SUPPLY VOLTAGE DYNAMIC RANGE and SNR vs SUPPLY VOLTAGE 0.010 100 G002 95 0.009 Dynamic Range and SNR – dB THD+N – Total Harmonic Distortion + Noise – % 93 0.008 0.007 0.006 0.005 93 91 Dynamic Range 89 SNR 87 0.004 0.003 4.0 4.5 5.0 VBUS – Supply Voltage – V 5.5 85 4.0 G003 Figure 3. 4.5 5.0 VBUS – Supply Voltage – V 5.5 G004 Figure 4. Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B 9 PCM2906B Not Recommended for New Designs SLES227 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS: ADC (continued) All specifications at TA = +25°C, VBUS = 5 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, using REG103xA-A, unless otherwise noted. TOTAL HARMONIC DISTORTION + NOISE AT –1 dB vs SAMPLING FREQUENCY DYNAMIC RANGE and SNR vs SAMPLING FREQUENCY 95 0.009 Dynamic Range and SNR – dB THD+N – Total Harmonic Distortion + Noise – % 0.010 0.008 0.007 0.006 0.005 93 91 Dynamic Range 89 SNR 87 0.004 0.003 85 30 35 40 45 50 fS – Sampling Frequency – kHz 30 35 40 45 50 fS – Sampling Frequency – kHz G005 Figure 5. G006 Figure 6. TYPICAL CHARACTERISTICS: DAC All specifications at TA = +25°C, VBUS = 5 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, using REG103xA-A, unless otherwise noted. TOTAL HARMONIC DISTORTION + NOISE AT 0 dB vs FREE-AIR TEMPERATURE DYNAMIC RANGE and SNR vs FREE-AIR TEMPERATURE 98 97 0.007 Dynamic Range and SNR – dB THD+N – Total Harmonic Distortion + Noise – % 0.008 0.006 0.005 0.004 95 Dynamic Range 94 93 92 91 0.003 −50 −25 0 25 50 75 TA – Free-Air Temperature – °C 100 90 −50 G007 Figure 7. 10 SNR 96 −25 0 25 50 TA – Free-Air Temperature – °C 75 100 G008 Figure 8. Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B PCM2906B Not Recommended for New Designs www.ti.com ........................................................................................................................................................................................... SLES227 – DECEMBER 2008 TYPICAL CHARACTERISTICS: DAC (continued) All specifications at TA = +25°C, VBUS = 5 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, using REG103xA-A, unless otherwise noted. TOTAL HARMONIC DISTORTION + NOISE AT 0 dB vs SUPPLY VOLTAGE DYNAMIC RANGE and SNR vs SUPPLY VOLTAGE 98 97 0.007 Dynamic Range and SNR – dB THD+N – Total Harmonic Distortion + Noise – % 0.008 0.006 0.005 0.004 95 Dynamic Range 94 93 92 91 0.003 4.0 4.5 5.0 90 4.0 5.5 VBUS – Supply Voltage – V 4.5 5.0 5.5 VBUS – Supply Voltage – V G009 Figure 9. Figure 10. TOTAL HARMONIC DISTORTION + NOISE AT 0 dB vs SAMPLING FREQUENCY DYNAMIC RANGE and SNR vs SAMPLING FREQUENCY G010 98 0.008 97 0.007 Dynamic Range and SNR – dB THD+N – Total Harmonic Distortion + Noise – % SNR 96 0.006 0.005 0.004 96 SNR 95 94 93 Dynamic Range 92 91 90 0.003 30 35 40 45 30 50 fS – Sampling Frequency – kHz G011 Figure 11. 35 40 45 fS – Sampling Frequency – kHz 50 G012 Figure 12. Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B 11 PCM2906B Not Recommended for New Designs SLES227 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS: SUPPLY CURRENT All specifications at TA = +25°C, VBUS = 5 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, using REG103xA-A, unless otherwise noted. OPERATIONAL and SUSPEND SUPPLY CURRENT vs SUPPLY VOLTAGE ICC – Operational Supply Current – mA 60 0.28 Operational 0.26 50 Suspend 40 0.24 30 0.22 20 4.00 4.25 4.50 4.75 5.00 5.25 ICC – Suspend Supply Current – mA 0.30 70 0.20 5.50 VBUS – Supply Voltage – V G013 Figure 13. OPERATIONAL SUPPLY CURRENT vs SAMPLING FREQUENCY SUSPEND SUPPLY CURRENT vs FREE-AIR TEMPERATURE 0.40 ICC – Suspend Supply Current – mA ICC – Operational Supply Current – mA 70 60 50 40 30 20 30 35 40 45 50 fS – Sampling Frequency – kHz 0.35 0.30 USB Spec Limit for Device (0.3 mA) 0.25 0.20 0.15 0.10 –40 G014 Figure 14. 12 –20 0 20 40 60 TA – Free-Air Temperature – °C 80 100 G015 Figure 15. Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B PCM2906B Not Recommended for New Designs www.ti.com ........................................................................................................................................................................................... SLES227 – DECEMBER 2008 TYPICAL CHARACTERISTICS: ADC DIGITAL DECIMATION FILTER FREQUENCY RESPONSE All specifications at TA = +25°C, VBUS = 5 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. OVERALL CHARACTERISTICS STOP-BAND ATTENUATION 0 0 −10 −20 −20 −40 Amplitude – dB Amplitude – dB −30 −60 −80 −100 −40 −50 −60 −70 −120 −80 −140 −90 −160 0 8 16 24 Frequency [y fS] 0.4 0.6 0.8 G016 Figure 17. PASSBAND RIPPLE TRANSITION-BAND RESPONSE 0 0.0 −4 −0.2 −0.4 −0.6 1.0 G017 Figure 16. 0.2 −0.8 0.0 0.2 Frequency [y fS] Amplitude – dB Amplitude – dB −100 0.0 32 −8 −12 −16 0.1 0.2 0.3 Frequency [y fS] 0.4 0.5 −20 0.46 G018 Figure 18. 0.48 0.50 0.52 Frequency [y fS] 0.54 G019 Figure 19. Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B 13 PCM2906B Not Recommended for New Designs SLES227 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS: ADC DIGITAL HIGH-PASS FILTER FREQUENCY RESPONSE All specifications at TA = +25°C, VBUS = 5 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. STOP-BAND CHARACTERISTICS PASSBAND CHARACTERISTICS 0 0.0 −10 −20 −0.2 Amplitude – dB Amplitude – dB −30 −40 −50 −60 −0.4 −0.6 −70 −80 −0.8 −90 −100 0.0 −1.0 0.1 0.2 0.3 Frequency [y fS/1000] 0.4 0 1 2 3 Frequency [y fS/1000] G020 Figure 20. 4 G021 Figure 21. TYPICAL CHARACTERISTICS: ADC ANALOG ANTIALIASING FILTER FREQUENCY RESPONSE All specifications at TA = +25°C, VBUS = 5 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. PASSBAND CHARACTERISTICS 0.0 −10 −0.2 Amplitude – dB Amplitude − dB STOP-BAND CHARACTERISTICS 0 −20 −30 −0.4 −0.6 −0.8 −40 −50 1 10 100 1k 10k −1.0 0.01 0.1 1 100 G023 G022 Figure 22. 14 10 f – Frequency – kHz f − Frequency − kHz Figure 23. Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B PCM2906B Not Recommended for New Designs www.ti.com ........................................................................................................................................................................................... SLES227 – DECEMBER 2008 TYPICAL CHARACTERISTICS: DAC DIGITAL INTERPOLATION FILTER FREQUENCY RESPONSE All specifications at TA = +25°C, VBUS = 5 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. STOP-BAND ATTENUATION PASSBAND RIPPLE 0 0.2 −10 −20 0.0 Amplitude – dB Amplitude – dB −30 −40 −50 −60 −0.2 −0.4 −70 −80 −0.6 −90 −100 0 1 2 3 −0.8 0.0 4 Frequency [y fS] 0.1 0.2 0.3 0.4 Frequency [y fS] G024 Figure 24. 0.5 G025 Figure 25. TRANSITION-BAND RESPONSE 0 −2 −4 Amplitude – dB −6 −8 −10 −12 −14 −16 −18 −20 0.46 0.47 0.48 0.49 0.50 0.51 0.52 0.53 0.54 Frequency [y fS] G026 Figure 26. Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B 15 PCM2906B Not Recommended for New Designs SLES227 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS: DAC ANALOG FIR FILTER FREQUENCY RESPONSE All specifications at TA = +25°C, VBUS = 5 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. PASSBAND CHARACTERISTICS 0.2 −10 0.0 Amplitude – dB Amplitude – dB STOP-BAND CHARACTERISTICS 0 −20 −30 −40 −0.2 −0.4 −0.6 −50 0 8 16 24 −0.8 0.0 32 Frequency [y fS] 0.1 0.2 0.3 0.4 Frequency [y fS] G027 Figure 27. 0.5 G028 Figure 28. TYPICAL CHARACTERISTICS: DAC ANALOG LOW-PASS FILTER FREQUENCY RESPONSE All specifications at TA = +25°C, VBUS = 5 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. PASSBAND CHARACTERISTICS 0.0 −10 −0.2 Amplitude – dB Amplitude – dB STOP-BAND CHARACTERISTICS 0 −20 −30 −0.4 −0.6 −0.8 −40 −50 1 10 100 1k 10k −1.0 0.01 0.1 1 100 G030 G029 Figure 29. 16 10 f – Frequency – kHz f – Frequency – kHz Figure 30. Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B Not Recommended for New Designs PCM2906B www.ti.com ........................................................................................................................................................................................... SLES227 – DECEMBER 2008 DETAILED DESCRIPTION USB INTERFACE Control data and audio data are transferred to the PCM2906B via D+ (pin 1) and D– (pin 2). All data to/from the PCM2906B are transferred at full speed. The device descriptor contains the information described in Table 2. The device descriptor can be modified on request; contact a Texas Instruments representative about the details. Table 2. Device Descriptor USB revision 2.0 compliant Device class 0x00 (device defined interface level) Device sub class 0x00 (not specified) Device protocol 0x00 (not specified) Max packet size for end-point 0 8 byte Vendor ID 0x08BB (default value, can be modified) Product ID 0x29B6 (default value, can be modified) Device release number 1.0 (0x0100) Number of configurations 1 Vendor string String #1 (see Table 4) Product string String #2 (see Table 4) Serial number Not supported The configuration descriptor contains the information described in Table 3. The configuration descriptor can be modified on request; contact a Texas Instruments representative about the details. Table 3. Configuration Descriptor Interface Four interfaces Power attribute 0x80 (Bus powered, no remote wakeup) Max power 0xFA (500 mA. Default value, can be modified) The string descriptor contains the information described in Table 4. The string descriptor can be modified on request; contact a Texas Instruments representative about the details. Table 4. String Descriptor #0 0x0409 #1 Burr-Brown from TI (default value, can be modified) #2 USB Audio CODEC (default value, can be modified) Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B 17 PCM2906B Not Recommended for New Designs SLES227 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com DEVICE CONFIGURATION Figure 31 illustrates the USB audio function topology. The PCM2906B has four interfaces. Each interface consists of alternative settings. End-Point #0 Default End-Point FU Analog Out End-Point #2 (IF #1) IT TID1 OT TID2 Audio Streaming Interface UID3 Analog In End-Point #4 (IF #2) IT TID4 OT TID5 Audio Streaming Interface Standard Audio Control Interface (IF #0) End-Point #5 (IF #3) HID Interface PCM2906B M0024-02 Figure 31. USB Audio Function Topology 18 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B PCM2906B Not Recommended for New Designs www.ti.com ........................................................................................................................................................................................... SLES227 – DECEMBER 2008 Interface #0 Interface #0 is the control interface. Alternative setting #0 is the only possible setting for interface #0. Alternative setting #0 describes the standard audio control interface. The audio control interface consists of a single terminal. The PCM2906B has the following five terminals: • Input terminal (IT #1) for isochronous-out stream • Output terminal (OT #2) for audio analog output • Feature unit (FU #3) for DAC digital attenuator • Input terminal (IT #4) for audio analog input • Output terminal (OT #5) for isochronous-in stream Input terminal #1 is defined as a USB stream (terminal type 0x0101). Input terminal #1 can accept two-channel audio streams consisting of left and right channels. Output terminal #2 is defined as a speaker (terminal type 0x0301). Input terminal #4 is defined as a microphone (terminal type 0x0201). Output terminal #5 is defined as a USB stream (terminal type 0x0101). Output terminal #5 can generate two-channel audio streams composed of left and right channel data. Feature unit #3 supports the following sound control features: • Volume control • Mute control The built-in digital volume controller can be manipulated by an audio-class-specific request from 0 dB to –64 dB in 1-dB steps. Changes are made by incrementing or decrementing by one step (1 dB) for every 1/fS time interval until the volume level has reached the requested value. Each channel can be set for different values. The master volume control is not supported. A request to the master volume is stalled and ignored. The built-in digital mute controller can be manipulated by audio-class-specific request. A master mute control request is acceptable. A request to an individual channel is stalled and ignored. Interface #1 Interface #1 is the audio streaming data-out interface. Interface #1 has the five alternative settings listed in Table 5. Alternative setting #0 is the zero-bandwidth setting. All other alternative settings are operational settings. Table 5. Interface #1 Alternative Settings ALTERNATIVE SETTING DATA FORMAT 00 TRANSFER MODE SAMPLING RATE (kHz) 32, 44.1, 48 Zero bandwidth 01 16-bit Stereo Twos complement (PCM) Adaptive 02 16-bit Mono Twos complement (PCM) Adaptive 32, 44.1, 48 03 8-bit Stereo Twos complement (PCM) Adaptive 32, 44.1, 48 04 8-bit Mono Twos complement (PCM) Adaptive 32, 44.1, 48 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B 19 PCM2906B Not Recommended for New Designs SLES227 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com Interface #2 Interface #2 is the audio streaming data-in interface. Interface #2 has the 19 alternative settings listed in Table 6. Alternative setting #0 is the zero-bandwidth setting. All other alternative settings are operational settings. Table 6. Interface #2 Alternative Settings ALTERNATIVE SETTING TRANSFER MODE DATA FORMAT 00 SAMPLING RATE (kHz) Zero Bandwidth 01 16-bit Stereo Twos complement (PCM) Asynchronous 48 02 16-bit Mono Twos complement (PCM) Asynchronous 48 03 16-bit Stereo Twos complement (PCM) Asynchronous 44.1 04 16-bit Mono Twos complement (PCM) Asynchronous 44.1 05 16-bit Stereo Twos complement (PCM) Asynchronous 32 06 16-bit Mono Twos complement (PCM) Asynchronous 32 07 16-bit Stereo Twos complement (PCM) Asynchronous 22.05 08 16-bit Mono Twos complement (PCM) Asynchronous 22.05 09 16-bit Stereo Twos complement (PCM) Asynchronous 16 0A 16-bit Mono Twos complement (PCM) Asynchronous 16 0B 8-bit Stereo Twos complement (PCM) Asynchronous 16 0C 8-bit Mono Twos complement (PCM) Asynchronous 16 0D 8-bit Stereo Twos complement (PCM) Asynchronous 8 0E 8-bit Mono Twos complement (PCM) Asynchronous 8 0F 16-bit Stereo Twos complement (PCM) Synchronous 11.025 10 16-bit Mono Twos complement (PCM) Synchronous 11.025 11 8-bit Stereo Twos complement (PCM) Synchronous 11.025 12 8-bit Mono Twos complement (PCM) Synchronous 11.025 Interface #3 Interface #3 is the interrupt data-in interface. Alternative setting #0 is the only possible setting for interface #3. Interface #3 consists of the HID consumer control device and reports the status of these three key parameters: • Mute (0xE209) • Volume up (0xE909) • Volume down (0xEA09) End-Points The PCM2906B has the following four end-points: • Control end-point (EP #0) • Isochronous-out audio data stream end-point (EP #2) • Isochronous-in audio data stream end-point (EP #4) • HID end-point (EP #5) The control end-point is a default end-point. The control end-point is used to control all functions of the PCM2906B by the standard USB request and USB audio class specific request from the host. The isochronous-out audio data stream end-point is an audio sink end-point, which receives the PCM audio data. The isochronous-out audio data stream end-point accepts the adaptive transfer mode. The isochronous-in audio data stream end-point is an audio source end-point that transmits the PCM audio data. The isochronous-in audio data stream end-point uses the asynchronous transfer mode. The HID end-point is an interrupt-in end-point. The HID end-point reports HID0, HID1, and HID2 pin status every 32 ms. The human interface device (HID) pins are defined as consumer control devices. The HID function is designed as an independent end-point from both isochronous-in and -out end-points. Therefore, the result obtained from the HID operation depends on the host software. Typically, the HID function is used as the primary audio-out device. 20 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B Not Recommended for New Designs PCM2906B www.ti.com ........................................................................................................................................................................................... SLES227 – DECEMBER 2008 Clock and Reset The PCM2906B requires a 12-MHz (±500 ppm) clock for the USB and audio functions. The clock can be generated by a built-in oscillator with a 12-MHz crystal resonator. The 12-MHz crystal resonator must be connected to XTI (pin 21) and XTO (pin 20) with one high-value (1-MΩ) resistor and two small capacitors, the capacitance of which depends on the load capacitance of the crystal resonator. An external clock can be supplied to XTI (pin 21). If an external clock is used, XTO (pin 20) must be left open. Because there is no clock disabling signal, use of the external clock supply is not recommended. SSPND (pin 28) is unable to use clock disabling. The PCM2906B has an internal power-on reset circuit, which triggers automatically when VBUS (pin 3) exceeds 2.5 V typical (2.7 V to 2.2 V). Approximately 700 µs is required until internal reset release. Digital Audio Interface The PCM2906 employs S/PDIF for both input and output. Isochronous-out data from the host are encoded to the S/PDIF output and the DAC analog output. Input data are selected from either the S/PDIF or ADC analog input. When the device detects S/PDIF input and successfully locks the received data, the isochronous-in transfer data source automatically selected is S/PDIF; otherwise, the data source selected is the ADC analog input. This feature is a customer option. It is the responsibility of the user to implement this feature. Supported Input/Output Data The following data formats are accepted by S/PDIF for input and output. All other data formats are unusable as S/PDIF. • 48-kHz 16-bit stereo • 44.1-kHz 16-bit stereo • 32-kHz 16-bit stereo Any mismatch of the sampling rate between the input S/PDIF signal and the host command is not acceptable. Any mismatch of the data format between the input S/PDIF signal and the host command may cause unexpected results, with the following exceptions: • Recording in monaural format from stereo data input at the same data rate • Recording in 8-bit format from 16-bit data input at the same data rate A combination of these two conditions is not acceptable. For playback, all possible data-rate sources are converted to the 16-bit stereo format at the same source data rate. Channel Status Information The channel status information is fixed as consumer application, PCM mode, copyright, and digital/digital converter. All other bits are fixed as 0's except for the sample frequency, which is set automatically according to the data received through the USB. Copyright Management Isochronous-in data are affected by the serial copy management system (SCMS). When the control bit indicates that the received digital audio data are original, the input digital audio data are transferred to the host. If the data are indicated as first generation or higher, the transferred data are routed to the analog input. Digital audio data output is always encoded as original with SCMS control. Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B 21 PCM2906B Not Recommended for New Designs SLES227 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com INTERFACE SEQUENCE Power-On, Attach, and Playback Sequence The PCM2906B is ready for setup when the reset sequence has finished and the USB device is attached. After a connection has been established by setup, the PCM2906B is ready to accept USB audio data. While waiting for the audio data (idle state), the analog output is set to bipolar zero (BPZ). When receiving the audio data, the PCM2906B stores the first audio packet, which contains 1-ms audio data, into the internal storage buffer. The PCM2906B starts playing the audio data when detecting the next start-of-frame (SOF) packet, as illustrated in Figure 32. 5 V (Typ) VBUS (Pin 3) 2.5 V (Typ) 0V Bus Reset st 1 Audio Data Set Configuration 2 nd Audio Data Bus Idle D+/D– SOF SOF SOF SSPND BPZ VOUTL VOUTR 700 ms Device Setup Internal Reset Ready for Setup 1 ms Ready for Playback T0055-02 Figure 32. Initial Sequence Play, Stop, and Detach Sequence When the host finishes or aborts the playback, the PCM2906B stops playing after the last audio data have played, as shown in Figure 33. VBUS (Pin 3) Audio Data Audio Data Last Audio Data D+/D– SOF SOF SOF SOF SOF VOUTL VOUTR Detach 1 ms T0056-02 Figure 33. Play, Stop, and Detach Sequence 22 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B PCM2906B Not Recommended for New Designs www.ti.com ........................................................................................................................................................................................... SLES227 – DECEMBER 2008 Record Sequence The PCM2906B starts audio capture into the internal memory after receiving the SET_INTERFACE command, as shown in Figure 34. Audio Data SET_INTERFACE IN Token Audio Data Audio Data IN Token IN Token D+/D– SOF SOF SOF SOF SOF VINL VINR 1 ms T0259-01 Figure 34. Record Sequence Suspend and Resume Sequence The PCM2906B enters the suspend state after a constant idle state on the USB bus (approximately 5 ms), as shown in Figure 35. While the PCM2906B enters the suspend state, the SSPND flag (pin 28) is asserted. The PCM2906B wakes up immediately upon detecting a non-idle state on the USB. Idle D+/D– SSPND Active 5 ms Suspend Active T0057-02 Figure 35. Suspend and Resume Sequence Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B 23 PCM2906B Not Recommended for New Designs SLES227 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com APPLICATION INFORMATION TYPICAL CIRCUIT CONNECTION 1 Figure 36 illustrates a typical circuit connection for a simple application. The circuit illustrated is for information only. The entire board design should be considered to meet the USB specification as a USB-compliant product. 1.5 kW ´ 3 1.5 kW PCM2906B 22 W D+ 22 W D– 1 D+ SSPND 28 2 D– VDDI 27 3 VBUS DGND 26 4 DGNDU DOUT 25 5 HID0 DIN 24 6 HID1 VCCXI 23 7 HID2 AGNDX 22 8 SEL0 XTI 21 9 SEL1 XTO 20 10 VCCCI VCCP2I 19 11 AGNDC AGNDP 18 12 VINL VCCP1I 17 13 VINR VOUTL 16 14 VCOM VOUTR 15 2.2 W VBUS 1 mF GND IC1 IN OUT GND ADJ EN 5 3 4 1 2 C13 D1 C4 + 27 kW C6 3.60 V– 3.85 V + 12 MHz C7 13 kW + C5 1 MW C1 C9 C10 C3 C2 + MUTE/ Power Down C8 + C11 + C12 LPF, Amp LPF, Amp S0264-02 NOTE: C1, C2: 10 µF C3, C4, C7, C8, C13: 1 µF (These capacitors must be less than 2 µF.) C5, C6: 10 pF to 33 pF (depending on crystal resonator) C9, C10, C11, C12: The capacitance may vary depending on design. IC1: REG103xA-A (TI) or equivalent. Analog performance may vary depending on IC1. D1: Schottky barrier diode (VF ≤ 350 mV at 10 mA, IR ≤ 2 µA at 4 V) Figure 36. Bus-Powered Configuration for High-Performance Application 24 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B PCM2906B Not Recommended for New Designs www.ti.com ........................................................................................................................................................................................... SLES227 – DECEMBER 2008 TYPICAL CIRCUIT CONNECTION 2 Figure 37 illustrates a typical circuit connection for a simple application. The circuit illustrated is for information only. The entire board design should be considered to meet the USB specification as a USB-compliant product. 1.5 kW ´ 4 PCM2906B 22 W D+ 22 W D– 1 D+ SSPND 28 2 D– VDDI 27 3 VBUS DGND 26 4 DGNDU DOUT 25 5 HID0 DIN 24 6 HID1 VCCXI 23 7 HID2 AGNDX 22 8 SEL0 XTI 21 9 SEL1 XTO 20 10 VCCCI VCCP2I 19 11 AGNDC AGNDP 18 12 VINL VCCP1I 17 13 VINR VOUTL 16 14 VCOM VOUTR 15 2.2 W VBUS 1 mF GND C3 C4 C5 1 MW C6 12 MHz C1 + C9 C10 + + C2 + C7 MUTE/ Power Down C8 + C11 + C12 LPF, Amp LPF, Amp S0265-02 NOTE: C1, C2: 10 µF C3, C4, C7, C8: 1 µF (These capacitors must be less than 2 µF.) C5, C6: 10 pF to 33 pF (depending on crystal resonator) C9, C10, C11, C12: The capacitance may vary depending on design. In this case, the analog performance of the ADC may be degraded. Figure 37. Bus-Powered Configuration OPERATING ENVIRONMENT For current information on the PCM2906B operating environment, see the Updated Operating Environments for PCM270X, PCM290X Applications application report, SLAA374. Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2906B 25 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) PCM2906BDB NRND SSOP DB 28 50 RoHS & Green NIPDAU Level-1-260C-UNLIM -25 to 85 PCM2906B PCM2906BDBR NRND SSOP DB 28 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -25 to 85 PCM2906B (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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