PCM2903C Burr-Brown Audio www.ti.com SBFS038 – JUNE 2012 Stereo Audio Codec with USB Interface, Single-Ended Analog Input/Output, and S/PDIF Check for Samples: PCM2903C FEATURES 1 • On-Chip USB Interface: – With Full-Speed Transceivers – Fully Compliant with USB 2.0 Specification – Certified by USB-IF – USB Adaptive Mode for Playback – USB Asynchronous Mode for Record – Self-Powered • 16-Bit Delta-Sigma ADC and DAC • Sampling Rates: – 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: – 3.3 V Typical • Stereo ADC: – Analog Performance at VCCC = VCCP1 = VCCP2 = VCCX = VDD = 3.3 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 • • Stereo DAC: – Analog Performance at VCCC = VCCP1 = VCCP2 = VCCX = VDD = 3.3 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 and Mute Controls – Suspend Flag Function 28-Pin SSOP Package APPLICATIONS • • • • USB Audio Speaker USB Headset USB Monitor USB Audio Interface Box DESCRIPTION The PCM2903C is Texas Instruments' single-chip, USB, stereo audio codec with a USB-compliant fullspeed protocol controller and S/PDIF. The USB protocol controller requires no software code. The PCM2903C 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 © 2012, Texas Instruments Incorporated PCM2903C SBFS038 – JUNE 2012 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. PACKAGE/ORDERING INFORMATION (1) PRODUCT PACKAGE-LEAD PACKAGE DESIGNATOR PCM2903CDB SSOP-28 DB (1) SPECIFIED TEMPERATURE RANGE PACKAGE MARKING –25°C to 85°C PCM2903C ORDERING NUMBER TRANSPORT MEDIA, QUANTITY PCM2903CDB Rails, 47 PCM2903CDBR Tape and Reel, 2000 For the most current package and ordering information, see the Package Option Addendum at the end of this document, or visit the device product folder at www.ti.com. ABSOLUTE MAXIMUM RATINGS (1) Over operating free-air temperature range (unless otherwise noted). PARAMETER Supply voltage, VCCC, VCCP1, VCCP2, VCCX, VDD PCM2903C UNIT –0.3 to 4 V Supply voltage differences, VCCC, VCCP1, VCCP2, VCCX, VDD ±0.1 V Ground voltage differences, AGNDC, AGNDP, AGNDX, DGND, DGNDU ±0.1 V –0.3 to 6.5 V –0.3 to (VDD + 0.3) < 4 V Digital input voltage SEL0, SEL1, DIN D+, D–, HID0, HID1, HID2, XTI, XTO, DOUT, SSPND Analog input voltage VINL, VINR, VCOM, VOUTR, VOUTL –0.3 to (VCCC + 0.3) < 4 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, 5 s) +260 °C Package temperature (IR reflow, peak) +250 °C Input current (any pins except supplies) (1) 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. THERMAL INFORMATION PCM2903C THERMAL METRIC (1) DB (SSOP) UNITS 28 PINS θJA Junction-to-ambient thermal resistance 64.5 θJCtop Junction-to-case (top) thermal resistance 24.5 θJB Junction-to-board thermal resistance 25.4 ψJT Junction-to-top characterization parameter 2.0 ψJB Junction-to-board characterization parameter 25.0 θJCbot Junction-to-case (bottom) thermal resistance N/A (1) 2 °C/W For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C PCM2903C www.ti.com SBFS038 – JUNE 2012 ELECTRICAL CHARACTERISTICS All specifications at TA = +25°C, VCCC = VCCP1 = VCCP2 = VCCX = VDD = 3.3 V, fS = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. PCM2903C 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 D+, D– VIH High-level input voltage XTI, HID0, HID1, and HID2 SEL0, SEL1 DIN 2 VDD 0.7 VDD VDD 2 5.25 0.7 VDD 5.25 D+, D– VIL Low-level input voltage 0.8 XTI, HID0, HID1, and HID2 0.3 VDD SEL0, SEL1 IIH IIL Low-level input current D+, D–, XTI, SEL0, SEL1 VDC 0.8 DIN High-level input current VDC 0.3 VDD VIN = 3.3 V ±10 HID0, HID1, and HID2 VIN = 3.3 V 50 80 DIN VIN = 3.3 V 65 100 D+, D–, XTI, SEL0, SEL1 VIN = 0 V ±10 HID0, HID1, and HID2 VIN = 0 V ±10 DIN ±10 VIN = 0 V μA μA OUTPUT LOGIC VOH D+, D– High-level output DOUT voltage SSPND 2.8 IOH = –4 mA 2.8 IOH = –2 mA 2.8 VDC D+, D– VOL Low-level output voltage 0.3 DOUT IOL = 4 mA 0.5 SSPND IOL = 2 mA 0.5 VDC CLOCK FREQUENCY Input clock frequency, XTI 11.994 12 12.006 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C MHz 3 PCM2903C SBFS038 – JUNE 2012 www.ti.com ELECTRICAL CHARACTERISTICS (continued) All specifications at TA = +25°C, VCCC = VCCP1 = VCCP2 = VCCX = VDD = 3.3 V, fS = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. PCM2903C PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ADC CHARACTERISTICS Resolution Audio data channel 8, 16 Bits 1, 2 Channel ADC Clock Frequency fS Sampling frequencies 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 (1) THD+N SNR Total harmonic distortion plus noise VIN = –1 dB 0.01 VIN = –60 dB 0.02 % 5 % Dynamic range A-weighted 81 89 dB Signal-to-noise ratio A-weighted 81 89 dB 80 85 dB Input voltage 0.6 VCCC VPP Center voltage 0.5 VCCC V Channel separation Analog Input Input impedance Antialising filter frequency response –3 dB fIN = 20 kHz 30 kΩ 150 kHz –0.08 dB ADC Digital Filter Performance Passband 0.454 fS Stop band 0.583 fS Hz Passband ripple ±0.05 Stop-band attenuation td HPF frequency response (1) 4 –65 Delay time dB dB 17.4/fS –3 dB Hz 0.078 fS/1000 s Hz fIN = 1 kHz, using a System Two™ audio measurement system by Audio Precision™ in RMS mode with a 20-kHz LPF and 400-Hz HPF in the calculation. Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C PCM2903C www.ti.com SBFS038 – JUNE 2012 ELECTRICAL CHARACTERISTICS (continued) All specifications at TA = +25°C, VCCC = VCCP1 = VCCP2 = VCCX = VDD = 3.3 V, fS = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. PCM2903C PARAMETER TEST CONDITIONS MIN TYP MAX UNIT DAC CHARACTERISTICS Resolution Audio data channel 8, 16 Bits 1, 2 Channel DAC Clock Frequency fS Sampling frequencies 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 (2) THD+N SNR Total harmonic distortion plus noise VOUT = 0 dB 0.005 VOUT = –60 dB 0.016 % 3 % Dynamic range EIAJ, A-weighted 87 93 dB Signal-to-noise ratio EIAJ, A-weighted 90 96 dB 86 92 dB Output voltage 0.6 VCCC VPP Center voltage 0.5 VCCC V Channel separation Analog Output VO Load impedance LPF frequency response AC coupling 10 –3 dB f = 20 kHz kΩ 250 kHz –0.03 dB DAC Digital Filter Performance Passband 0.445 fS Stop band 0.555 fS Hz Passband ripple ±0.1 Stop-band attenuation td –43 Delay time Hz dB dB 14.3/fS s POWER-SUPPLY REQUIREMENTS VDD, VCCC, VCCP1, VCCP2, VCCX Voltage range Supply current PD Power dissipation 3 ADC, DAC operation Suspend mode (3) 3.3 3.6 VDC 54 70 mA μA 250 ADC, DAC operation 178 Suspend mode (3) 0.83 252 mW mW TEMPERATURE RANGE Operating temperature range θJA (2) (3) –25 Thermal resistance +85 100 °C °C/W fOUT = 1 kHz, using a System Two audio measuerment system by Audio Precision in RMS mode with a 20-kHz LPF and 400-Hz HPF. Under USB suspend state. Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C 5 PCM2903C SBFS038 – JUNE 2012 www.ti.com PIN CONFIGURATIONS DB PACKAGE SSOP-28 (TOP VIEW) D+ 1 28 D- 2 27 SSPND VDD VBUS 3 26 DGND DGNDU 4 25 DOUT HID0 5 24 HID1 6 23 DIN VCCX HID2 7 22 AGNDX SEL0 8 21 XTI SEL1 9 20 XTO VCCC 10 19 VCCP2 AGNDC 11 18 VINL 12 17 AGNDP VCCP1 VINR 13 16 VOUTL VCOM 14 15 VOUTR PIN DESCRIPTIONS PIN NAME NO. I/O AGNDC 11 – DESCRIPTION Analog ground for codec AGNDP 18 – Analog ground for PLL AGNDX 22 – Analog ground for oscillator 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 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) (2) (4) SEL1 9 I Connected to the USB port of VBUS SSPND 28 O Suspend flag, active-low (Low: suspend, High: operational) VBUS 3 – Must be connected to VDD VCCC 10 – Analog power supply for codec (5) VCCP1 17 – Analog power supply for PLL (5) VCCP2 19 – Analog power supply for PLL (5) VCCX 23 – Analog power supply for oscillator (5) VCOM 14 – Common for ADC/DAC (VCCC/2) (5) (5) VDD 27 – Digital power supply 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 © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C PCM2903C www.ti.com SBFS038 – JUNE 2012 FUNCTIONAL BLOCK DIAGRAM VCCC VCCP1 VCCP2 VCCX VDD Lock DIN AGNDC AGNDP AGNDX DGND DGNDU 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 VOUTR DOUT ISO-Out End-Point HID End-Point S/PDIF Encoder HID0 HID1 HID2 USB Protocol Controller 96 MHz PLL (×8) XTI 12 MHz Tracker (SpAct) XTO Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C 7 PCM2903C SBFS038 – JUNE 2012 www.ti.com BLOCK DIAGRAM OF ANALOG FRONT-END (RIGHT CHANNEL) 4.7 mF + VINR 30 kW – 13 – + (+) + (–) Delta-Sigma Modulator VCOM 14 + (VCCC/2) 10 mF 8 Reference Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C PCM2903C www.ti.com SBFS038 – JUNE 2012 TYPICAL CHARACTERISTICS: ADC All specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. TOTAL HARMONIC DISTORTION + NOISE AT –1 dB vs FREE-AIR TEMPERATURE DYNAMIC RANGE AND SNR vs FREE-AIR TEMPERATURE 95 Dynamic Range and SNR (dB) Total Harmonic Distortion + Noise (%) 0.01 0.009 0.008 0.007 0.006 0.005 0.004 91 Dynamic Range 89 SNR 87 85 0.003 -50 0 -25 25 50 75 Free-Air Temperature (°C) 100 -50 -25 0 25 50 75 100 Free-Air Temperature (°C) G001 G002 Figure 1. Figure 2. TOTAL HARMONIC DISTORTION + NOISE AT –1 dB vs SUPPLY VOLTAGE DYNAMIC RANGE AND SNR vs SUPPLY VOLTAGE 95 Dynamic Range and SNR (dB) 0.01 Total Harmonic Distortion + Noise (%) 93 0.009 0.008 0.007 0.006 0.005 0.004 93 91 Dynamic Range 89 SNR 87 85 0.003 2.8 3 3.2 3.4 Supply Voltage (V) 3.6 3.8 2.8 G003 Figure 3. 3 3.2 3.4 3.6 3.8 Supply Voltage (V) G004 Figure 4. Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C 9 PCM2903C SBFS038 – JUNE 2012 www.ti.com TYPICAL CHARACTERISTICS: ADC (continued) All specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. TOTAL HARMONIC DISTORTION + NOISE AT –1 dB vs SAMPLING FREQUENCY DYNAMIC RANGE AND SNR vs SAMPLING FREQUENCY 95 Dynamic Range and SNR (dB) Total Harmonic Distortion + Noise (%) 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 93 91 Dynamic Range 89 SNR 87 85 30 35 40 45 30 50 Sampling Frequency (kHz) 35 40 45 50 Sampling Frequency (kHz) G005 Figure 5. G006 Figure 6. TYPICAL CHARACTERISTICS: DAC All specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. TOTAL HARMONIC DISTORTION + NOISE AT 0 dB vs FREE-AIR TEMPERATURE DYNAMIC RANGE AND SNR vs FREE-AIR TEMPERATURE 98 Dynamic Range and SNR (dB) Total Harmonic Distortion + Noise (%) 0.008 0.007 0.006 0.005 0.004 97 SNR 96 95 94 93 Dynamic Range 92 91 90 0.003 -50 -25 0 25 50 Free-Air Temperature (°C) 75 100 -50 G007 Figure 7. 10 -25 0 25 50 Free-Air Temperature (°C) 75 100 G008 Figure 8. Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C PCM2903C www.ti.com SBFS038 – JUNE 2012 TYPICAL CHARACTERISTICS: DAC (continued) All specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. TOTAL HARMONIC DISTORTION + NOISE AT 0 dB vs SUPPLY VOLTAGE DYNAMIC RANGE AND SNR vs SUPPLY VOLTAGE 98 Dynamic Range and SNR (dB) Total Harmonic Distortion + Noise (%) 0.008 0.007 0.006 0.005 0.004 SNR 96 95 94 93 Dynamic Range 92 91 90 0.003 3 3.1 3.2 3.3 3.4 3.5 Supply Voltage (V) 3.6 3 3.1 3.2 3.3 3.4 3.5 3.6 Supply Voltage (V) G009 G010 Figure 9. Figure 10. TOTAL HARMONIC DISTORTION + NOISE AT 0 dB vs SAMPLING FREQUENCY DYNAMIC RANGE AND SNR vs SAMPLING FREQUENCY 98 Dynamic Range and SNR (dB) 0.008 Total Harmonic Distortion + Noise (%) 97 0.007 0.006 0.005 0.004 97 SNR 96 95 94 93 Dynamic Range 92 91 90 0.003 30 35 40 Sampling Frequency (kHz) 45 50 30 G011 Figure 11. 35 40 45 50 Sampling Frequency (kHz) G012 Figure 12. Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C 11 PCM2903C SBFS038 – JUNE 2012 www.ti.com TYPICAL CHARACTERISTICS: ADC OUTPUT SPECTRUM All specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. OUTPUT SPECTRUM (–60 dB, N = 8192) 0 -20 -20 -40 -40 Amplitude (dB) Amplitude (dB) OUTPUT SPECTRUM (–1 dB, N = 8192) 0 -60 -80 -60 -80 -100 -100 -120 -120 -140 -140 0 5 10 15 5 0 20 10 15 20 Frequency (kHz) Frequency (kHz) G014 G013 Figure 13. Figure 14. TYPICAL CHARACTERISTICS: DAC OUTPUT SPECTRUM All specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. OUTPUT SPECTRUM (–60 dB, N = 8192) 0 -20 -20 -40 -40 Amplitude (dB) Amplitude (dB) OUTPUT SPECTRUM (0 dB, N = 8192) 0 -60 -80 -60 -80 -100 -100 -120 -120 -140 -140 0 5 10 15 20 0 Frequency (kHz) 5 10 G015 Figure 15. 12 15 20 Frequency (kHz) G016 Figure 16. Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C PCM2903C www.ti.com SBFS038 – JUNE 2012 TYPICAL CHARACTERISTICS: SUPPLY CURRENT All specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. 1.6 70 1.4 60 1.2 Operational 50 1 40 0.8 30 0.6 0.4 20 Supply 0.2 10 0 0 3 3.1 3.2 3.3 3.4 3.5 3.6 80 Operational Supply Current (mA) 80 OPERATIONAL SUPPLY CURRENT vs SAMPLING FREQUENCY Suspend Supply Current (mA) Operational Supply Current (mA) OPERATIONAL AND SUSPEND SUPPLY CURRENT vs SUPPLY VOLTAGE 70 60 50 ADC and DAC 40 30 20 10 0 30 Supply Voltage (V) G017 Figure 17. 35 40 45 Sampling Frequency (kHz) 50 G018 Figure 18. Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C 13 PCM2903C SBFS038 – JUNE 2012 www.ti.com TYPICAL CHARACTERISTICS: ADC DIGITAL DECIMATION FILTER FREQUENCY RESPONSE All specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. OVERALL CHARACTERISTICS STOP-BAND ATTENUATION 0 0 -10 -20 -20 Amplitude (dB) Amplitude (dB) -40 -60 -80 -100 -120 -30 -40 -50 -60 -70 -80 -140 -90 -160 -100 0 16 8 24 0 32 Frequency (× fS) 0.2 0.4 G019 Figure 19. 1 G020 TRANSITION-BAND RESPONSE 0.2 0 0 -4 Amplitude (dB) Amplitude (dB) 0.8 Figure 20. PASSBAND RIPPLE -0.2 -0.4 -0.6 -8 -12 -16 -0.8 0 0.1 0.2 0.3 Frequency (× fS) 0.4 0.5 -20 0.46 G021 Figure 21. 14 0.6 Frequency (× fS) 0.48 0.5 Frequency (× fS) 0.52 0.54 G022 Figure 22. Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C PCM2903C www.ti.com SBFS038 – JUNE 2012 TYPICAL CHARACTERISTICS: ADC DIGITAL HIGH-PASS FILTER FREQUENCY RESPONSE All specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. STOP-BAND CHARACTERISTICS PASSBAND CHARACTERISTICS 0 0 -10 -0.2 -30 Amplitude (dB) Amplitude (dB) -20 -40 -50 -60 -70 -80 -0.4 -0.6 -0.8 -90 -100 -1.0 0 0.1 0.2 0.4 0.3 Frequency (× fS/1000) 0 1 2 3 4 Frequency (× fS/1000) G023 Figure 23. G024 Figure 24. TYPICAL CHARACTERISTICS: ADC ANALOG ANTIALIASING FILTER FREQUENCY RESPONSE All specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. PASSBAND CHARACTERISTICS 0 -10 -0.2 Amplitude (dB) Amplitude (dB) STOP-BAND CHARACTERISTICS 0 -20 -30 -40 -0.4 -0.6 -0.8 -50 -1.0 1 10 100 1k 10k 0.01 0.1 1 10 100 Frequency (kHz) Frequency (kHz) G026 G025 Figure 25. Figure 26. Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C 15 PCM2903C SBFS038 – JUNE 2012 www.ti.com TYPICAL CHARACTERISTICS: DAC DIGITAL INTERPOLATION FILTER FREQUENCY RESPONSE All specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. STOP-BAND ATTENUATION PASSBAND RIPPLE 0 0.2 -10 0 -30 Amplitude (dB) Amplitude (dB) -20 -40 -50 -60 -70 -80 -0.2 -0.4 -0.6 -90 -100 -0.8 0 1 2 4 3 Frequency (× fS) 0 0.1 0.2 0.3 Frequency (× fS) G027 Figure 27. 0.4 0.5 G028 Figure 28. TRANSITION-BAND RESPONSE 0 -2 Amplitude (dB) -4 -6 -8 -10 -12 -14 -16 -18 -20 0.46 0.47 0.48 0.49 0.5 0.51 0.52 Frequency (× fS) 0.53 0.54 G029 Figure 29. 16 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C PCM2903C www.ti.com SBFS038 – JUNE 2012 TYPICAL CHARACTERISTICS: DAC ANALOG FIR FILTER FREQUENCY RESPONSE All specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. PASSBAND CHARACTERISTICS 0.2 -10 0 Amplitude (dB) Amplitude (dB) STOP-BAND CHARACTERISTICS 0 -20 -30 -0.2 -0.4 -0.6 -40 -0.8 -50 0 8 16 24 0 32 Frequency (× fS) 0.1 0.2 0.3 0.4 0.5 Frequency (× fS) G030 Figure 30. G031 Figure 31. TYPICAL CHARACTERISTICS: DAC ANALOG LOW-PASS FILTER FREQUENCY RESPONSE All specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 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 0.0 -20 -30 -40 -0.4 -0.6 -0.8 -50 -1.0 1 10 100 1k 10k 0.01 Frequency (kHz) 0.1 1 10 100 Frequency (kHz) G032 Figure 32. G033 Figure 33. Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C 17 PCM2903C SBFS038 – JUNE 2012 www.ti.com DETAILED DESCRIPTION USB INTERFACE Control data and audio data are transferred to the PCM2903C via D+ (pin 1) and D– (pin 2). All data to and from the PCM2903C are transferred at full speed. The device descriprtor contains the information described in Table 1. Table 1. Device Descriptor USB revision 2.0 compliant Device class 0x00 (device-defined interface level) Device subclass 0x00 (not specified) Device protocol 0x00 (not specified) Max packet size for end-point 0 8 bytes Vendor ID 0x08BB Product ID 0x29C3 Device release number 1.0 (0x0100) Number of configurations 1 Vendor strings String #1 (see Table 3) Product strings String #2 (see Table 3) Serial number Not supported The configuration descriptor contains the information described in Table 2. Table 2. Configuration Descriptor Interface Four interfaces Power attribute 0xC0 (self-powered, no remote wakeup) Maximum power 0x0A (20 mA) The string descriptor contains the information described in Table 3. Table 3. String Descriptor #0 0x0409 #1 BurrBrown from Texas Instruments #2 USB Audio CODEC (1) (1) 18 Ensure that there are two blank spaces between "Audio" and "CODEC"; copying and pasting will not transfer the two blank spaces correctly. Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C PCM2903C www.ti.com SBFS038 – JUNE 2012 DEVICE CONFIGURATON Figure 34 illustrates the USB audio function topology. The PCM2903C 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 Figure 34. USB Audio Function Topology Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C 19 PCM2903C SBFS038 – JUNE 2012 www.ti.com 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 PCM2903C 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 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 line connector (terminal type 0x0603). 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 described in Table 4. Alternative setting #0 is the zero-bandwidth setting. Table 4. Interface #1 Alternative Settings ALTERNATIVE SETTING DATA FORMAT 00 20 TRANSFER MODE SAMPLING RATE (kHz) Zero bandwidth 01 16-bit Stereo Twos complement (PCM) Adaptive 32, 44.1, 48 02 03 16-bit Mono Twos complement (PCM) Adaptive 32, 44.1, 48 8-bit Stereo Twos complement (PCM) Adaptive 04 32, 44.1, 48 8-bit Mono Twos complement (PCM) Adaptive 32, 44.1, 48 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C PCM2903C www.ti.com SBFS038 – JUNE 2012 Interface #2 Interface #2 is the audio streaming data-in interface. Interface #2 has the 19 alternative settings described in Table 5. Alternative setting #0 is the zero-bandwidth setting. All other alternative settings are operational settings. Table 5. Interface #2 Alternative Settings ALTERNATIVE SETTING DATA FORMAT 00 TRANSFER MODE SAMPLING RATE (kHz) 48 Zero bandwidth 01 16-bit Stereo Twos complement (PCM) Asynchronous 02 03 16-bit Mono Twos complement (PCM) Asynchronous 48 16-bit Stereo Twos complement (PCM) Asynchronous 44.1 04 05 16-bit Mono Twos complement (PCM) Asynchronous 44.1 16-bit Stereo Twos complement (PCM) Asynchronous 32 06 07 16-bit Mono Twos complement (PCM) Asynchronous 32 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 PCM2903C 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 PCM2903C by the standard USB request and an 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 asynchronous transfer mode. The HID end-point is an interrupt-in end-point. HID endpoint 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. Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C 21 PCM2903C SBFS038 – JUNE 2012 www.ti.com Clock and Reset The PCM2903C requires a 12-MHz (±500 ppm) clock for the USB and audio function, which can be generated by a built-in crystal oscillator with a 12-MHz crystal resonator or supplied by an external clock. The 12-MHz crystal resonator must be connected to XTI (pin 21) and XTO (pin 20) with one high (1-MΩ) resistor and two small capacitors, the capacitance of which depends on the load capacitance of the crystal resonator. If the external clock is used, the clock must be supplied to XTI, and XTO must be open. The PCM2903C has an internal power-on reset circuit, which triggers automatically when VDD (pin 27) 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 PCM2903C employs both S/PDIF 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 as either S/PDIF or ADC analog input. When the device detects an S/PDIF input and successfully locks on the received data, the isochronous-in transfer data source is automatically selected from S/PDIF itself; 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 the S/PDIF input and output. All other data formats are unable to use 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 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. 22 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C PCM2903C www.ti.com SBFS038 – JUNE 2012 INTERFACE SEQUENCE Power On, Attach, and Playback Sequence The PCM2903C is ready for setup when the reset sequence has finished and the USB bus is attached. In order to perform certain reset sequences defined in the USB specification, VDD, VCCC, VCCP1, VCCP2, and VCCX must rise up within 10 ms / 3.3 V. After connection has been established by setup, the PCM2903C is ready to accept USB audio data. While waiting, the audio data (idle state) and analog output are set to bipolar zero (BPZ). When receiving the audio data, the PCM2903C stores the first audio packet, which contained 1-ms audio data, into the internal storage buffer. The PCM2903C starts playing the audio data when detecting the next start of frame (SOF) packet, as illustrated in Figure 35 and Figure 36. 3.3 V (Typ) VDD (Pin 27) 2.5 V (Typ) 0V 5 V = VBUS (Typ) SEL1 (Pin 9) Bus Reset First Audio Data Set Configuration Second Audio Data Bus Idle D+/D– SOF SOF SOF SSPND BPZ VOUTL VOUTR 700 ms Device Setup 1 ms Internal Reset Ready for Setup Ready for Playback Attach (Connect to USB Bus) Figure 35. Attach After Power On Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C 23 PCM2903C SBFS038 – JUNE 2012 www.ti.com 3.3 V (Typ) VDD (Pin 27) 2.5 V (Typ) 0V 5 V = VBUS (Typ) SEL1 (Pin 9) Bus Reset First Audio Data Set Configuration Second Audio Data Bus Idle D+/D– SOF SOF SOF SSPND BPZ VOUTL VOUTR 700 ms Device Setup 1 ms Internal Reset Ready for Setup Ready for Playback Figure 36. Power-On Under Attach Play, Stop, and Detach Sequence When the host finishes or aborts the playback, the PCM2903C stops playing after the last audio data have played, as shown in Figure 37. 5 V = VBUS (Typ) SEL1 (Pin 9) Audio Data Audio Data Last Audio Data D+/D– SOF SOF SOF SOF SOF VOUTL VOUTR Detach 1 ms Figure 37. Play, Stop, and Detach Sequence 24 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C PCM2903C www.ti.com SBFS038 – JUNE 2012 Record Sequence The PCM2903C starts the audio capture into the internal memory after receiving the SET_INTERFACE command, as shown in Figure 38. Audio Data SET_INTERFACE IN Token Audio Data IN Token Audio Data IN Token D+/D– SOF SOF SOF SOF SOF VINL VINR 1 ms Figure 38. Record Sequence Suspend and Resume Sequence The PCM2903C enters the suspend state after it detects a constant idle state on the USB bus (approximately 5 ms), as shown in Figure 39. While the PCM2903C enters the suspend state, the SSPND flag (pin 28) is asserted. The PCM2903C wakes up immediately after detecting a non-idle state on the USB bus. Idle D+/D– SSPND Active 5 ms Suspend Active Figure 39. Suspend and Resume Sequence Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C 25 PCM2903C SBFS038 – JUNE 2012 www.ti.com APPLICATION INFORMATION TYPICAL CIRCUIT CONNECTION Figure 40 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. VDD (3.3 V) VCC (3.3 V) 1.5 kW × 3 IC1 1.5 kW 22 W D+ 1 D+ SSPND 28 D– 2 D- VDD 27 VBUS 3 VBUS DGND 26 GND 4 DGNDU DOUT 25 5 HID0 DIN 24 6 HID1 VCCX 23 7 HID2 AGNDX 22 8 SEL0 XTI 21 9 SEL1 XTO 20 10 VCCC VCCP2 19 11 AGNDC AGNDP 18 12 VINL VCCP1 17 13 VINR VOUTL 16 14 VCOM VOUTR 15 22 W C1 1 MW C9 C10 C2 C3 C4 C5 1 MW C6 12 MHz C7 MUTE/ Power Down C8 C11 LPF, Amp C12 LPF, Amp NOTE: IC1 must be driven by VDD with a 5-V tolerant input. C1, C2, C3, C4, C7, C8: 10 μF C5, C6: 10 pF to 33 pF (depending on crystal resonator) C9, C10, C11, C12: The capacitance may vary depending on design. Figure 40. Self-Powered Configuration OPERATING ENVIRONMENT For current information on the PCM2903C operating environment, see Application Report SLAA374, Updated Operating Environments for PCM270X, PCM290X Applications, available for download from www.ti.com. 26 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): PCM2903C PACKAGE OPTION ADDENDUM www.ti.com 26-Jul-2012 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp PCM2903CDB ACTIVE SSOP DB 28 50 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCM2903CDBR ACTIVE SSOP DB 28 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM (3) Samples (Requires Login) (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) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. 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Addendum-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 25-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device PCM2903CDBR Package Package Pins Type Drawing SSOP DB 28 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2000 330.0 16.4 Pack Materials-Page 1 8.2 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 10.5 2.5 12.0 16.0 Q1 PACKAGE MATERIALS INFORMATION www.ti.com 25-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) PCM2903CDBR SSOP DB 28 2000 367.0 367.0 38.0 Pack Materials-Page 2 MECHANICAL DATA MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001 DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE 28 PINS SHOWN 0,38 0,22 0,65 28 0,15 M 15 0,25 0,09 8,20 7,40 5,60 5,00 Gage Plane 1 14 0,25 A 0°–ā8° 0,95 0,55 Seating Plane 2,00 MAX 0,10 0,05 MIN PINS ** 14 16 20 24 28 30 38 A MAX 6,50 6,50 7,50 8,50 10,50 10,50 12,90 A MIN 5,90 5,90 6,90 7,90 9,90 9,90 12,30 DIM 4040065 /E 12/01 NOTES: A. B. C. D. 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