PCM2906DB

Burr Brown Products from Texas Instruments PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 STEREO AUDIO CODEC WITH USB INTERFACE, SINGLE ENDED ANALOG INPUT/OUTPUT AND S/PDIF FEATURES D PCM2904: Without S/PDIF D PCM2906: With S/PDIF D On-Chip USB Interface: − With Full-Speed Transceivers − Fully Compliant With USB 1.1 Specification − Certified by USB-IF − Partially Programmable Descriptors(1) − USB Adaptive Mode for Playback − USB Asynchronous Mode for Record − Bus Powered D Stereo DAC: − Analog Performance at VBUS = 5 V − THD+N = 0.005% − SNR = 96 dB − Dynamic Range = 93 dB − Oversampling Digital Filter − Pass-Band Ripple = ±0.1 dB − Stop-Band Attenuation = –43 dB − Single-Ended Voltage Output − Analog LPF Included Multifunctions: − Human Interface Device (HID) Volume ± Control and Mute Control − Suspend Flag Package: 28-Pin SSOP, Lead-Free Product D D 16-Bit Delta-Sigma ADC and DAC D Sampling Rate: − DAC: 32, 44.1, 48 kHz − ADC: 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz D D On-Chip Clock Generator With Single 12-MHz Clock Source APPLICATIONS D USB Audio Speaker D USB Headset D USB Monitor D USB Audio Interface Box DESCRIPTION The PCM2904/2906 is Texas Instruments single-chip USB stereo audio codec with USB-compliant full-speed protocol controller and S/PDIF (PCM2906 only). The USB protocol controller works with no software code, but the USB descriptors can be modified in some areas (for example, vendor ID/product ID). The PCM2904/2906 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 and with independent playback and record sampling rates. D Single Power Supply: 5 V Typical (VBUS) D Stereo ADC: − Analog Performance at VBUS = 5 V − THD+N = 0.01% − SNR = 89 dB − Dynamic Range = 89 dB − Decimation Digital Filter − Pass-Band Ripple = ±0.05 dB − Stop-Band Attenuation = –65 dB − Single-Ended Voltage Input − Antialiasing Filter Included − Digital LCF Included 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. (1)The descriptor can be modified by changing a mask. SpAct is a trademark of Texas Instruments, Incorporated. Apple. Mac, and Mac OS are trademarks of Apple Computer, Inc. Intel is a trademark of Intel Corporation. Microsoft, Windows, Windows Me, and Windows XP are trademarks of Microsoft Corporation. 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 Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright  2007, Texas Instruments Incorporated www.ti.com PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 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 PRODUCT PACKAGE−LEAD PACKAGE DESIGNATOR 28DB 28DB SPECIFIED TEMPERATURE RANGE −25°C to 85°C −25°C to 85°C PACKAGE MARKING PCM2904 PCM2906 ORDERING NUMBER PCM2904DB PCM2904DBR PCM2906DB PCM2906DBR TRANSPORT MEDIA Rails Tape and reel Rails Tape and reel PCM2904DB PCM2906DB 28-lead SSOP 28-lead SSOP ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range unless otherwise noted(1) PCM2904/PCM2906 Supply voltage, VBUS Ground voltage differences, AGNDC, AGNDP, AGNDX, DGND, DGNDU SEL0, SEL1, TEST0 (DIN)(2) Digital input voltage D+, D–, HID0, HID1, HID2, XTI, XTO, TEST1 (DOUT)(2), SSPND VINL, VINR, VCOM, VOUTR, VOUTL -0.3 to 6.5 ±0.1 −0.3 to 6.5 −0.3 to (VDDI + 0.3) < 4 −0.3 to VCCCI+ 0.3) < 4 −0.3 to 4 ±10 −40 to 125 −55 to 150 150 260 250 mA °C °C °C °C, 5 s °C V UNIT V V Analog input voltage V VCCCI, VCCP1I, VCCP2I, VCCXI, VDDI Input current (any pins except supplies) Ambient temperature under bias Storage temperature, Tstg Junction temperature TJ Lead temperature (soldering) Package temperature (IR reflow, peak) (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 “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) ( ): PCM2906 2 www.ti.com PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 ELECTRICAL CHARACTERISTICS all specifications at TA = 25°C, VBUS, = 5 V, fS = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted PCM2904DB, PCM2906DB PARAMETER Digital Input/Output Host interface Audio data format Input Logic VIH(1) VIL(1) VIH(2) (3) VIL(2) (3) VIH(4) VIL(4) VIH(5) VIL(5) IIH(1)(2)(4) IIL(1)(2)(4) IIH(3) IIL(3) IIH(5) IIL(5) Output Logic VOH(1) VOL(1) VOH(6) VOL(6) VOH(7) IOH = –4 mA IOL = 4 mA IOH = −2 mA IOL = 2 mA Input logic current VIN = 3.3 V VIN = 0 V VIN = 3.3 V VIN = 0 V VIN = 3.3 V VIN = 0 V 2.8 0.3 Output logic level 2.8 0.5 2.8 0.5 11.994 12.000 8, 16 1, 2 8, 11.025, 16, 22.05, 32, 44.1, 48 ±1 ±2 ±0 ±5 12.006 MHz bits channel kHz % of FSR % of FSR Vdc 50 65 Input logic level Apply USB Revision 1.1, full speed USB isochronous data format 2 2.52 2 2.52 3.3 0.8 3.3 0.9 5.25 0.8 5.25 0.9 ±10 ±10 80 ±10 100 ±10 µA Vdc TEST CONDITIONS MIN TYP MAX UNIT VOL(7) Clock Frequency Input clock frequency, XTI ADC Characteristics Resolution Audio data channel Clock Frequency fs Sampling frequency DC Accuracy Gain mismatch, channel-to-channel Gain error Bipolar zero error (1) Pins 1, 2: D+, D– (2) Pin 21: XTI (3) Pins 5, 6, 7: HID0, HID1, HID2 (4) Pins 8, 9: SEL0, SEL1 (5) Pin 24: DIN (6) Pin 25: DOUT (7) Pin 28: SSPND ±10 % of FSR 3 PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 www.ti.com ELECTRICAL CHARACTERISTICS(continued) all specifications at TA = 25°C, VBUS, = 5 V, fS = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted PCM2904DB, PCM2906DB PARAMETER Dynamic Performance(1) THD+N Total harmonic distortion plus noise Dynamic range S/N ratio Channel separation Analog Input Input voltage Center voltage Input impedance Antialiasing filter frequency response Digital Filter Performance Pass band Stop band Pass-band ripple Stop-band attenuation td Delay time LCF frequency response DAC Characteristics Resolution Audio data channel Clock Frequency fs Sampling frequency DC Accuracy Gain mismatch, channel-to-channel Gain error Bipolar zero error Dynamic Performance(4) THD+N Total harmonic distortion plus noise Dynamic range SNR Signal-to-noise ratio Channel separation VOUT = 0 dB VOUT = –60 dB EIAJ, A-weighted EIAJ, A-weighted 87 90 86 0.005% 3% 93 96 92 dB dB dB 0.016% 32, 44.1, 48 ±1 ±2 ±2 ±5 kHz % of FSR % of FSR 8, 16 1, 2 bits channel –3 dB –65 17.4/fs 0.078 fs 0.583 fs ±0.05 0.454 fs Hz Hz dB dB s MHz –3 dB fIN = 20 kHz 0.6 VCCCI 0.5 VCCCI 30 150 –0.08 Vp−p V kΩ kHz dB VIN = –0.5 dB(2), VCCCI = 3.67 V VIN = –0.5 dB(3) VIN = –60 dB A-weighted A-weighted 81 81 80 0.01% 0.1% 5% 89 89 85 dB dB dB 0.02% TEST CONDITIONS MIN TYP MAX UNIT ±10 % of FSR (1) 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. (2) Using external voltage regulator for VCCCI (as shown in Figure 36 and Figure 37, using REG103xA−A) (3) Using internal voltage regulator for VCCCI (as shown in Figure 38 and Figure 39) (4) fOUT = 1 kHz, using the System Two audio measurement system by Audio Precision in RMS mode with 20 kHz LPF, 400 Hz HPF. System Two and Audio Precision are trademarks of Audio Precision, Inc. Other trademarks are the property of their respective owners. 4 www.ti.com PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 ELECTRICAL CHARACTERISTICS(continued) all specifications at TA = 25°C, VBUS, = 5 V, fS = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted PCM2904DB, PCM2906DB PARAMETER TEST CONDITIONS MIN TYP MAX Analog Output VO Output voltage Center voltage Load impedance LPF frequency response Digital filter performance Pass band Stop band Pass-band ripple Stop-band attenuation td Delay time Power Supply Requirements VBUS Voltage range Supply current PD Power dissipation Internal power supply voltage(2) Temperature Range Operating temperature θJA Thermal resistance 28-pin SSOP (1) In USB suspend state (2) Pins 10, 17, 19, 23, 27: VCCCI, VCCP1I, VCCP2I, VCCXI, VDDI −25 100 85 _C _C/W ADC, DAC operation Suspend mode(1) ADC, DAC operation Suspend mode(1) 3.25 4.35 –43 14.3 fs 5 56 210 280 1.05 3.35 3.5 352 5.25 67 0.555 fs ±0.1 0.445 fs Hz Hz dB dB s VDC mA µA mW VDC AC coupling –3 dB f = 20 kHz 10 250 –0.03 0.6 VCCCI 0.5 VCCCI Vp−p V kΩ kHz dB UNIT PIN ASSIGNMENTS PCM2904 (TOP VIEW) PCM2906 (TOP VIEW) 28 27 26 25 24 23 22 21 20 19 18 17 16 15 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 SSPND VDDI DGND TEST1 TEST0 VCCXI AGNDX XTI XTO VCCP2I AGNDP VCCP1I VOUTL VOUTR 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 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 5 PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 www.ti.com PCM2904 Terminal Functions TERMINAL NAME AGNDC AGNDP AGNDX D– D+ DGND DGNDU HID0 HID1 HID2 SEL0 SEL1 SSPND TEST0 TEST1 VBUS VCCCI VCCP1I VCCP2I VCCXI VCOM VDDI VINL VINR VOUTL VOUTR XTI XTO (1) LV-TTL level NO. 11 18 22 2 1 26 4 5 6 7 8 9 28 24 25 3 10 17 19 23 14 27 12 13 16 15 21 20 I/O − − − I/O I/O − − I I I I I O I O − − − − − − − I I O O I O Analog ground for codec Analog ground for PLL Analog ground for oscillator USB differential input/output minus(1) USB differential input/output plus(1) Digital ground Digital ground for USB transceiver HID key state input (mute), active high(3) HID key state input (volume up), active high(3) HID key state input (volume down), active high(3) Must be set to high(5) Must be set to high(5) Suspend flag, active low (Low: suspend, High: operational) Test pin, must be connected to GND Test pin, must be left open Connect to USB power (VBUS) Internal analog power supply for codec(4) Internal analog power supply for PLL(4) Internal analog power supply for PLL(4) Internal analog power supply for oscillator(4) Common for ADC/DAC (VCCCI/2)(4) Internal digital power supply(4) ADC analog input for L-channel ADC analog input for R-channel DAC analog output for L-channel DAC analog output for R-channel Crystal oscillator input(2) Crystal oscillator output DESCRIPTION (2) 3.3-V CMOS-level input (3) 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. (4) Connect a decoupling capacitor to GND. (5) TTL Schmitt trigger, 5-V tolerant 6 www.ti.com PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 PCM2906 Terminal Functions TERMINAL NAME AGNDC AGNDP AGNDX D– D+ DGND DGNDU DIN DOUT HID0 HID1 HID2 SEL0 SEL1 SSPND VBUS VCCCI VCCP1I VCCP2I VCCXI VCOM VDDI VINL VINR VOUTL VOUTR XTI XTO (1) LV-TTL level NO. 11 18 22 2 1 26 4 24 25 5 6 7 8 9 28 3 10 17 19 23 14 27 12 13 16 15 21 20 I/O − − − I/O I/O − − I O I I I I I O − − − − − − − I I O O I O Analog ground for codec Analog ground for PLL Analog ground for oscillator USB differential input/output minus(1) USB differential input/output plus(1) Digital ground Digital ground for USB transceiver S/PDIF input(5) S/PDIF output HID key state input (mute), active high(3) HID key state input (volume up), active high(3) HID key state input (volume down), active high(3) Must be set to high(6) Must be set to high(6) Suspend flag, active low (Low: suspend, High: operational) Connected to USB power (VBUS) Internal analog power supply for codec(4) Internal analog power supply for PLL(4) Internal analog power supply for PLL(4) Internal analog power supply for oscillator(4) Common for ADC/DAC (VCCCI/2)(4) Internal digital power supply(4) ADC analog input for L-channel ADC analog input for R-channel DAC analog output for L-channel DAC analog output for R-channel Crystal oscillator input(2) Crystal oscillator output DESCRIPTIONS (2) 3.3-V CMOS-level input (3) 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. (4) Connect a decoupling capacitor to GND. (5) 3.3-V CMOS level input with internal pulldown, 5 V tolerant (6) TTL Schmitt trigger, 5-V tolerant 7 PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 www.ti.com PCM2904 FUNCTIONAL BLOCK DIAGRAM VCCCI VCCP1I VCCP2I VCCXI VDDI AGNDC AGNDP AGNDX DGND DGNDU 5-V to 3.3-V Voltage Regulator TEST0 TEST1 Power Manager SSPND VBUS VINL ADC VINR Analog PLL VCOM Selector Analog PLL FIFO ISO-In End-Point USB SIE XCVR D+ D− Control End-Point SEL0 SEL1 ISO-Out End-Point VOUTL DAC VOUTR FIFO HID End-Point HID0 HID1 HID2 USB Protocol Controller PLL (y8) 96 MHz Tracker (SpAct) XTI 12 MHz XTO 8 www.ti.com PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 PCM2906 FUNCTIONAL BLOCK DIAGRAM VCCCI VCCP1I VCCP2I VCCXI VDDI AGNDC AGNDP AGNDX DGND DGNDU 5-V to 3.3-V Voltage Regulator Lock Power Manager SSPND DIN S/PDIF Decoder VBUS VINL ADC VINR Analog PLL VCOM Selector Analog PLL FIFO ISO-In End-Point USB SIE XCVR D+ D− Control End-Point SEL0 SEL1 ISO-Out End-Point VOUTL DAC VOUTR FIFO DOUT S/PDIF Encoder HID End-Point HID0 HID1 HID2 USB Protocol Controller PLL (y8) 96 MHz Tracker (SpAct) XTI 12 MHz XTO 9 PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 www.ti.com BLOCK DIAGRAM OF ANALOG FRONT-END (RIGHT CHANNEL) 4.7 µF + + 10 µF 13 VINR 30 kΩ − − + + (−) Delta-Sigma Modulator (+) VCOM 14 (VCCCI/2) Reference 10 www.ti.com PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 TYPICAL CHARACTERISTICS ADC TOTAL HARMONIC DISTORTION + NOISE vs FREE-AIR TEMPERATURE 0.10 0.010 THD+N – Total Harmonic Distortion + Noise – % 0.09 0.009 0.08 0.008 0.07 0.007 0.06 0.006 0.05 0.005 0.04 0.004 0.03 0.003 −50 85 −50 Dynamic Range and SNR – dB 93 95 DYNAMIC RANGE and SNR vs FREE-AIR TEMPERATURE 91 Dynamic Range 89 SNR 87 −25 0 25 50 75 100 −25 0 25 50 75 100 TA – Free-Air Temperature – °C TA – Free-Air Temperature – °C Figure 1. THD + N at –0.5 dB vs Temperature TOTAL HARMONIC DISTORTION + NOISE vs SUPPLY VOLTAGE 0.10 0.010 THD+N – Total Harmonic Distortion + Noise – % 0.09 0.009 0.08 0.008 0.07 0.007 0.06 0.006 0.05 0.005 0.04 0.004 0.03 0.003 4.0 85 4.0 Dynamic Range and SNR – dB 93 95 Figure 2 DYNAMIC RANGE and SNR vs SUPPLY VOLTAGE 91 Dynamic Range 89 SNR 87 4.5 5.0 5.5 4.5 5.0 5.5 VBUS – Supply Voltage – V VBUS – Supply Voltage – V Figure 3. THD + N at –0.5 dB vs Supply Voltage Figure 4 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. 11 PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 www.ti.com ADC TOTAL HARMONIC DISTORTION + NOISE vs SAMPLING FREQUENCY 0.10 0.010 THD+N – Total Harmonic Distortion + Noise – % 95 0.09 0.009 0.08 0.008 0.07 0.007 0.06 0.006 0.05 0.005 0.04 0.004 0.03 0.003 30 35 40 45 50 85 30 35 40 45 50 fS – Sampling Frequency – kHz fS – Sampling Frequency – kHz Dynamic Range and SNR – dB 93 DYNAMIC RANGE and SNR vs SAMPLING FREQUENCY 91 Dynamic Range 89 SNR 87 Figure 5. THD + N at –0.5 dB vs Sampling Frequency Figure 6 DAC TOTAL HARMONIC DISTORTION + NOISE vs FREE-AIR TEMPERATURE 0.08 0.008 THD+N – Total Harmonic Distortion + Noise – % 98 97 Dynamic Range and SNR – dB 0.07 0.007 96 95 94 93 92 91 0.03 0.003 −50 90 −50 Dynamic Range SNR DYNAMIC RANGE and SNR vs FREE-AIR TEMPERATURE 0.06 0.006 0.05 0.005 0.04 0.004 −25 0 25 50 75 100 −25 0 25 50 75 100 TA – Free-Air Temperature – °C TA – Free-Air Temperature – °C Figure 7. THD + N at 0 dB vs Temperature Figure 8 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. 12 www.ti.com PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 DAC TOTAL HARMONIC DISTORTION + NOISE vs SUPPLY VOLTAGE 0.08 0.008 THD+N – Total Harmonic Distortion + Noise – % 98 97 Dynamic Range and SNR – dB 0.07 0.007 96 95 94 93 92 91 0.03 0.003 4.0 90 4.0 Dynamic Range SNR DYNAMIC RANGE and SNR vs SUPPLY VOLTAGE 0.06 0.006 0.05 0.005 0.04 0.004 4.5 5.0 5.5 4.5 5.0 5.5 VBUS – Supply Voltage – V VBUS – Supply Voltage – V Figure 9. THD + N at 0 dB vs Supply Voltage Figure 10 TOTAL HARMONIC DISTORTION + NOISE vs SAMPLING FREQUENCY 0.08 0.008 THD+N – Total Harmonic Distortion + Noise – % 98 97 Dynamic Range and SNR – dB 0.07 0.007 DYNAMIC RANGE and SNR vs SAMPLING FREQUENCY SNR 96 95 94 Dynamic Range 93 92 91 0.06 0.006 0.05 0.005 0.04 0.004 0.03 0.003 30 35 40 45 50 fS – Sampling Frequency – kHz 90 30 35 40 45 50 fS – Sampling Frequency – kHz Figure 11. THD + N at 0 dB vs Sampling Frequency Figure 12 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. 13 PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 www.ti.com SUPPLY CURRENT OPERATIONAL and SUSPEND SUPPLY CURRENT vs SUPPLY VOLTAGE 70 ICC – Operational Supply Current – mA 0.30 60 Operational 0.28 50 Suspend 40 0.26 0.24 30 0.22 20 4.00 4.25 4.50 4.75 5.00 5.25 0.20 5.50 VBUS – Supply Voltage – V Figure 13 OPERATIONAL SUPPLY CURRENT vs SAMPLING FREQUENCY 70 ICC – Operational Supply Current – mA 0.40 SUSPEND SUPPLY CURRENT vs FREE-AIR TEMPERATURE ICC – Suspend Supply Current – mA 60 0.35 USB Spec Limit for Device (0.3 mA) 0.30 50 0.25 40 0.20 30 0.15 20 30 35 40 45 50 fS – Sampling Frequency – kHz 0.10 −40 −20 0 20 ICC – Suspend Supply Current – mA 40 60 80 100 TA – Free-Air Temperature – °C Figure 14. Supply Current vs Sampling Frequency, ADC and DAC at Same fS Figure 15. Supply Current vs Temperature in Suspend Mode 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. 14 www.ti.com PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 ADC DIGITAL DECIMATION FILTER FREQUENCY RESPONSE AMPLITUDE vs FREQUENCY 0 −20 −40 −30 −60 −80 −100 −120 −80 −140 −160 0 8 16 Frequency [y fS] 24 32 −90 −100 0.0 Amplitude – dB Amplitude – dB −40 −50 −60 −70 0 −10 −20 AMPLITUDE vs FREQUENCY 0.2 0.4 0.6 0.8 1.0 Frequency [y fS] Figure 16. Overall Characteristic Figure 17. Stop-Band Attenuation AMPLITUDE vs FREQUENCY 0.2 0 AMPLITUDE vs FREQUENCY −0.0 0.0 −4 Amplitude – dB −0.2 Amplitude – dB 0.1 0.2 0.3 0.4 0.5 −8 −0.4 −12 −0.6 −16 −0.8 0.0 −20 0.46 0.48 0.50 Frequency [y fS] 0.52 0.54 Frequency [y fS] Figure 18. Pass-Band Ripple Figure 19. Transition-Band Response All specifications at TA = 25°C, VBUS = 5 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. 15 PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 www.ti.com ADC DIGITAL HIGH-PASS FILTER FREQUENCY RESPONSE AMPLITUDE vs FREQUENCY 0 −10 −20 −30 Amplitude – dB Amplitude – dB −40 −50 −60 −70 −80 −90 −100 0.0 −1.0 0.1 0.2 Frequency [y fS/1000] 0.3 0.4 0 1 2 Frequency [y fS/1000] 3 4 −0.8 −0.4 −0.2 −0.0 0.0 AMPLITUDE vs FREQUENCY −0.6 Figure 20. Stop-Band Characteristic Figure 21. Pass-Band Characteristic ADC ANALOG ANTIALIASING FILTER FREQUENCY RESPONSE AMPLITUDE vs FREQUENCY 0 −0.0 0.0 AMPLITUDE vs FREQUENCY −10 −0.2 Amplitude – dB −20 Amplitude – dB 1 10 100 f – Frequency – kHz 1k 10k −0.4 −30 −0.6 −40 −0.8 −50 −1.0 0.01 0.1 1 f – Frequency – kHz 10 100 Figure 22. Stop-Band Characteristic Figure 23. Pass-Band Characteristic All specifications at TA = 25°C, VBUS = 5 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. 16 www.ti.com PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 DAC DIGITAL INTERPOLATION AND DE-EMPHASIS FILTER FREQUENCY RESPONSE AMPLITUDE vs FREQUENCY 0 −10 −20 −30 Amplitude – dB Amplitude – dB −40 −50 −60 −70 −80 −90 −100 0 1 2 Frequency [y fS] 3 4 −0.8 0.0 −0.6 −0.2 −0.0 0.0 0.2 AMPLITUDE vs FREQUENCY −0.4 0.1 0.2 0.3 0.4 0.5 Frequency [y fS] Figure 24. Stop-Band Attenuation AMPLITUDE vs FREQUENCY 0 −2 −4 −6 Amplitude – dB −8 −10 −12 −14 −16 −18 −20 0.46 0.47 0.48 Figure 25. Pass-Band Ripple 0.49 0.50 0.51 Frequency [y fS] 0.52 0.53 0.54 Figure 26. Transition-Band Response All specifications at TA = 25°C, VBUS = 5 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. 17 PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 www.ti.com DAC ANALOG FIR FILTER FREQUENCY RESPONSE AMPLITUDE vs FREQUENCY 0 0.2 AMPLITUDE vs FREQUENCY −10 −0.0 0.0 Amplitude – dB −20 Amplitude – dB 0 8 16 Frequency [y fS] 24 32 −0.2 −30 −0.4 −40 −0.6 −50 −0.8 0.0 0.1 0.2 0.3 0.4 0.5 Frequency [y fS] Figure 27. Stop-Band Characteristic Figure 28. Pass-Band Characteristic DAC ANALOG LOW-PASS FILTER FREQUENCY RESPONSE AMPLITUDE vs FREQUENCY 0 −0.0 0.0 AMPLITUDE vs FREQUENCY −10 −0.2 Amplitude – dB −20 Amplitude – dB 1 10 100 f – Frequency – kHz 1k 10k −0.4 −30 −0.6 −40 −0.8 −50 −1.0 0.01 0.1 1 f – Frequency – kHz 10 100 Figure 29. Stop-Band Characteristic Figure 30. Pass-Band Characteristic All specifications at TA = 25°C, VBUS = 5 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless otherwise noted. 18 www.ti.com PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 USB INTERFACE Control data and audio data are transferred to the PCM2904/2906 via D+ (pin 1) and D– (pin 2). All data to/from the PCM2904/2906 is transferred at full speed. The device descriprtor contains the information described in Table 1. The device descriptor can be modified on request; contact a Texas Instruments representative about the details. Table 1. Device Descriptor USB revision Device class Device sub class Device protocol Max packet size for end-point 0 Vendor ID Product ID Device release number Number of configurations Vendor string Product string Serial number 1.1 compliant 0x00 (device defined interface level) 0x00 (not specified) 0x00 (not specified) 8 byte 0x08BB (default value, can be modified) 0x2904/0x2906 (default value, can be modified) 1.0 (0x0100) 1 String #1 (see Table 3) String #2 (see Table 3) Not supported The configuration descriptor contains the information described in Table 2. The configuration descriptor can be modified on request; contact a Texas Instruments representative about the details. Table 2. Configuration Descriptor Interface Power attribute Max power Four interfaces 0x80 (Bus powered, no remote wakeup) 0xFA (500 mA. Default value, can be modified) The string descriptor contains the information described in Table 3. The string descriptor can be modified on request; contact a Texas Instruments representative about the details. Table 3. String Descriptor #0 #1 #2 0x0409 Burr-Brown from TI (default value, can be modified) USB audio codec (default value, can be modified) 19 PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 www.ti.com DEVICE CONFIGURATION Figure 31 illustrates the USB audio function topology. The PCM2904/2906 has four interfaces. Each interface is constructed by alternative settings. End-Point #0 Default End-Point FU End-Point #2 (IF #1) Audio Streaming Interface Analog Out IT TID1 UID3 OT TID2 End-Point #4 (IF #2) Audio Streaming Interface Analog In OT TID5 IT TID4 Standard Audio Control Interface (IF #0) End-Point #5 (IF #3) HID Interface PCM2904/2906 Figure 31. USB Audio Function Topology 20 www.ti.com PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 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 is constructed by a terminal. The PCM2904/2906 has the following five terminals. D D D D D 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 2-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 2-channel audio streams consisting of left and right channels. Feature unit #3 supports the following sound control features. D Volume control D Mute control The built-in digital volume controller can be manipulated by an audio-class-specific request from 0.0 dB to –64 dB in steps of 1 dB. 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 following seven alternative settings. Alternative setting #0 is the zero-bandwidth setting. All other alternative settings are operational settings. ALTERNATIVE SETTING 00 01 02 03 04 05 06 16 bit 16 bit 8 bit 8 bit 8 bit 8 bit Stereo Mono Stereo Mono Stereo Mono DATA FORMAT Zero bandwidth 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) Offset binary (PCM8) Offset binary (PCM8) Adaptive Adaptive Adaptive Adaptive Adaptive Adaptive 32, 44.1, 48 32, 44.1, 48 32, 44.1, 48 32, 44.1, 48 32, 44.1, 48 32, 44.1, 48 TRANSFER MODE SAMPLING RATE (kHz) 21 PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 www.ti.com Interface #2 Interface #2 is the audio streaming data-in interface. Interface #2 has the following 19 alternative settings. Alternative setting #0 is the zero-bandwidth setting. All other alternative settings are operational settings. ALTERNATIVE SETTING 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 16 bit 16 bit 16 bit 16 bit 16 bit 16 bit 16 bit 16 bit 16 bit 16 bit 8 bit 8 bit 8 bit 8 bit 16 bit 16 bit 8 bit 8 bit Stereo Mono Stereo Mono Stereo Mono Stereo Mono Stereo Mono Stereo Mono Stereo Mono Stereo Mono Stereo Mono DATA FORMAT Zero bandwidth 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) 2s complement (PCM) Asynchronous Asynchronous Asynchronous Asynchronous Asynchronous Asynchronous Asynchronous Asynchronous Asynchronous Asynchronous Asynchronous Asynchronous Asynchronous Asynchronous Synchronous Synchronous Synchronous Synchronous 48 48 44.1 44.1 32 32 22.05 22.05 16 16 16 16 8 8 11.025 11.025 11.025 11.025 TRANSFER MODE SAMPLING RATE (kHz) Interface #3 Interface #3 is the interrupt data-in interface. Alternative setting #0 is the only possible setting for interface #3. Interface #3 constructs the HID consumer control device. Interface #3 reports the following three key statuses. D Mute (0xE209) D Volume up (0xE909) D Volume down (0xEA09) End-Points The PCM2904/2906 has the following four end-points. D D D D 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 PCM2904/2906 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 in 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. This means that the result obtained from the HID operation depends on the host software. Typically, the HID function is used as a primary audio-out device. 22 www.ti.com PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 Clock and Reset The PCM2904/2906 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 PCM2904/2906 has an internal power-on reset circuit, which is triggered automatically when VBUS (pin 3) exceeds 2.5 V typical (2.7 V to 2.2 V). About 700 µs is required until internal reset release. Digital Audio Interface (PCM2906) The PCM2906 employs S/PDIF for both input and output. Isochronous-out data from the host is encoded to the S/PDIF output and the DAC analog output. Input data is 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. Supported Input Data (PCM2906) The following data formats are accepted by S/PDIF for input and output. All other data formats are unusable as S/PDIF. D 48-kHz 16-bit stereo D 44.1-kHz 16-bit stereo D 32-kHz 16-bit stereo Mismatch between the input data format and the host command may cause unexpected results, with the following exceptions: D Recording in monaural format from stereo data input at the same data rate D Recording in 8-bit format from 16-bit data input at the same data rate A combination of the two foregoing conditions is not accepted. For playback, all possible data-rate sources are converted to the 16-bit stereo format at the same source data rate. Channel Status Information (PCM2906) The channel status information is fixed as consumer application, PCM mode, copyright, and digital/digital converter. All other bits are fixed as 0s except for the sample frequency, which is set automatically according to the data received through the USB. Copyright Management (PCM2906) Isochronous-in data is affected by the serial copy management system (SCMS). When the control bit indicates that the received digital audio data is original, the input digital audio data is transferred to the host. If the data is indicated as first generation or higher, the transferred data is routed to the analog input. Digital audio data output is always encoded as original with SCMS control. The implementation of this feature is optional. It is the designer’s responsibility to determine whether to implement this feature in a product or not. 23 PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 www.ti.com INTERFACE SEQUENCE Power-On, Attach, and Playback Sequence The PCM2904/2906 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 PCM2904/PCM2906 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 PCM2904/2906 stores the first audio packet, which contained 1-ms audio data, into the internal storage buffer. The PCM2904/2906 starts playing the audio data when detecting the following start-of-frame (SOF) packet. VBUS (Pin 3) 0V Bus Idle D+/D− SSPND VOUTL VOUTR 700 µs Internal Reset Play, Stop, and Detach Sequence When the host finishes or aborts the playback, the PCM2904/2906 stops playing after the last audio data has played. Record Sequence The PCM2904/2906 starts audio capture into the internal memory after receiving the SET_INTERFACE command. Suspend and Resume Sequence The PCM2904/2906 enters the suspend state after a constant idle state on the USB bus, approximately 5 ms. While the PCM2904/2906 enters the suspend state, the SSPND flag (pin 28) is asserted. The PCM2904/2906 wakes up immediately on detecting a non-idle state on the USB. 24 ÓÓÓÓ ÓÓÓ Ó ÓÓÓÓ ÓÓÓÓ ÓÓÓÓÓÓ ÓÓ ÓÓ Ó ÓÓÓÓ ÓÓÓÓ ÓÓÓÓÓÓ ÓÓ ÓÓ ÓÓ ÓÓÓÓÓÓ ÓÓ ÓÓ SOF SOF SOF BPZ Device Setup 1 ms Ready for Setup Ready for Playback ÓÓÓ ÓÓÓ ÓÓÓ ÓÓÓ ÓÓÓ ÓÓÓ ÓÓÓ ÓÓÓ ÓÓÓ ÓÓÓ ÓÓÓ ÓÓÓ ÓÓÓ ÓÓÓ ÓÓÓ ÓÓÓ ÓÓÓ ÓÓÓ 2.5 V (Typ) 5.0 V (Typ) Bus Reset Set Configuration 1st Audio Data 2nd Audio Data Figure 32. Initial Sequence www.ti.com PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 VBUS (Pin 3) Audio Data D+/D− Audio Data Last Audio Data VOUTL VOUTR 1 ms Detach D+/D− SOF VINL VINR 1 ms D+/D− SSPND ÓÓÓÓ ÓÓÓÓÓ ÓÓÓÓÓÓÓ ÓÓÓ Ó Ó ÓÓÓÓ ÓÓÓÓÓ ÓÓÓÓÓÓÓ ÓÓÓ Ó Ó Active 5 ms Suspend Figure 35. Suspend and Resume ÓÓ ÓÓ ÓÓ ÓÓÓÓÓ ÓÓ Ó ÓÓ ÓÓÓÓÓÓÓÓÓÓ ÓÓÓÓ ÓÓÓÓÓÓ ÓÓÓÓ SOF SOF SOF SOF SOF Figure 33. Play, Stop, and Detach Audio Data IN Token IN Token Audio Data IN Token Audio Data SET_INTERFACE SOF SOF SOF SOF Figure 34. Record Sequence Idle ÓÓ ÓÓ Active 25 PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 www.ti.com PCM2904 TYPICAL CIRCUIT CONNECTION 1 Figure 36 illustrates a typical circuit connection for a simple application. The circuit illustrated is for information only. The whole board design should be considered to meet the USB specification as a USB compliant product. 1.5 kΩ y 3 1.5 kΩ PCM2904 22 Ω D+ D– VBUS GND 2.2 Ω 1 mF 22 Ω 1 D+ 2 D– 3 VBUS 4 DGNDU 5 HID0 6 HID1 7 HID2 SSPND VDDI DGND TEST1 TEST0 VCCXI AGNDX XTI XTO VCCP2I AGNDP VCCP1I VOUTL VOUTR 28 27 26 25 24 23 22 21 20 12 MHz 19 18 17 16 15 + + C8 C11 C12 C7 1 MΩ C5 C6 MUTE/ Power Down LPF, Amp LPF, Amp C4 C3 IC1 IN OUT GND ADJ EN 1 2 3 4 5 8 SEL0 3.60 V – 3.85 V + C1 9 SEL1 10 VCCCI 11 AGNDC 12 VINL 13 VINR C2 + 14 VCOM C13 C9 C10 + + 27 kΩ D1 13 kΩ 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 PCM2904 Application 26 www.ti.com PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 PCM2906 TYPICAL CIRCUIT CONNECTION 1 Figure 37 illustrates a typical circuit connection for a simple application. The circuit illustrated is for information only. The whole board design should be considered to meet the USB specification as a USB compliant product. 1.5 kΩ y 3 1.5 kΩ PCM2906 22 Ω D+ D– VBUS GND 2.2 Ω 1 mF 22 Ω 1 D+ 2 D– 3 VBUS 4 DGNDU 5 HID0 6 HID1 7 HID2 SSPND VDDI DGND DOUT DIN VCCXI AGNDX XTI XTO VCCP2I AGNDP VCCP1I VOUTL VOUTR 28 27 26 25 24 23 22 21 20 12 MHz 19 18 17 16 15 + + C8 C11 C12 C7 1 MΩ C5 C6 MUTE/ Power Down LPF, Amp LPF, Amp C4 C3 IC1 IN OUT GND ADJ EN 1 2 3 4 5 8 SEL0 3.60 V – 3.85 V + C1 9 SEL1 10 VCCCI 11 AGNDC 12 VINL 13 VINR C2 + 14 VCOM C13 C9 C10 + + 27 kΩ D1 13 kΩ 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 37. Bus-Powered Configuration for High-Performance PCM2906 Application 27 PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 www.ti.com PCM2904 TYPICAL CIRCUIT CONNECTION 2 Figure 38 illustrates a typical circuit connection for a simple application. The circuit illustrated is for information only. The whole board design should be considered to meet the USB specification as a USB compliant product. 1.5 kΩ y 4 PCM2904 22 Ω D+ D– VBUS GND 2.2 Ω 1 mF 22 Ω 1 D+ 2 D– 3 VBUS 4 DGNDU 5 HID0 6 HID1 7 HID2 8 SEL0 9 SEL1 C1 SSPND VDDI DGND TEST1 TEST0 VCCXI AGNDX XTI XTO VCCP2I AGNDP VCCP1I VOUTL VOUTR 28 27 26 25 24 23 22 21 20 12 MHz 10 VCCCI 11 AGNDC C9 C10 19 18 17 16 15 + + C8 C11 C12 1 MΩ C5 C6 C7 MUTE/ Power Down LPF, Amp LPF, Amp C4 C3 + + + C2 12 VINL 13 VINR + 14 VCOM NOTES: 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 A/D converter may be degraded. Figure 38. PCM2904 Bus-Powered Configuration 28 www.ti.com PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 PCM2906 TYPICAL CIRCUIT CONNECTION 2 Figure 39 illustrates a typical circuit connection for a simple application. The circuit illustrated is for information only. The whole board design should be considered to meet the USB specification as a USB compliant product. 1.5 kΩ x 4 PCM2906 22 Ω D+ D– VBUS GND 2.2 Ω 1 mF 22 Ω 1 D+ 2 D– 3 VBUS 4 DGNDU 5 HID0 6 HID1 7 HID2 8 SEL0 9 SEL1 C1 + C9 C10 + + C2 + 10 VCCCI 11 AGNDC 12 VINL 13 VINR 14 VCOM SSPND VDDI DGND DOUT DIN VCCXI AGNDX XTI XTO VCCP2I AGNDP VCCP1I VOUTL VOUTR 28 27 26 25 24 23 22 21 20 12 MHz 19 18 17 16 15 + + C8 C11 C12 LPF, Amp LPF, Amp 1 MΩ C5 C6 C7 MUTE/ Power Down C4 C3 NOTES: 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 A/D converter may be degraded. Figure 39. PCM2906 Bus-Powered Configuration 29 PCM2904 PCM2906 SLES042B − JUNE 2002 − REVISED MARCH 2007 www.ti.com APPLICATION INFORMATION OPERATING ENVIRONMENT To get the appropriate operation, one of the following operating systems must be working on the host PC that has the USB port assured by the manufacturer. If the condition is fulfilled, the operation of the PCM2904/2906 does not depend on the operating speed of the CPU. Texas Instruments has confirmed following operating environments. D Operating System − − − − − − Microsoft Windows 98/98SE/Me Japanese/English Edition Microsoft Windows 2000 Professional Japanese/English Edition Microsoft Windows XP Home/Professional Japanese/English Edition (For Windows XP, use the latest version of the USB audio driver that is available on Windows update site) Apple Computer Mac OS 9.1 or later Japanese/English Edition Apple Computer Mac OS X 10.0 or later English Edition Apple Computer Mac OS X 10.1 or later Japanese Edition (For Mac OS X 10.0 Japanese Edition, plug and play does not work for USB audio device appropriately) Motherboard using Intel 440BX or ZX chipset (using USB controller in the chipset) Motherboard using Intel i810 chipset (using USB controller in the chipset) Motherboard using Intel i815 chipset (using USB controller in the chipset) Motherboard using Intel i820 chipset (using USB controller in the chipset) Motherboard using Intel i845 chipset (using USB controller in the chipset) Motherboard using Intel i850 chipset (using USB controller in the chipset) Motherboard using Apollo KT133 chipset (using USB controller in the chipset) Motherboard using Apollo Pro plus chipset (using USB controller in the chipset) Motherboard using MVP4 or MVP3 chipset (using USB controller in the chipset) Motherboard using Aladdin V chipset (using USB controller in the chipset) Motherboard using SiS530 or SiS559 chipset (using USB controller in the chipset) Motherboard using SiS735 chipset (using USB controller in the chipset) D PC: Following PC-AT compatible computers for above OS (OS requirement must be met) − − − − − − − − − − − − NOTE: The OSs and PCs for which the operation of the PCM2904/2906 was confirmed are listed above. The PCM2904/2906 may also work with other OSs and PCs that have not been tested. Furthermore, there is no assurance that the PCM2904/2906 will work with every PC having a compatible chipset, because other design factors of the motherboard may also cause incompatibility. The PCM2904/2906 has been acknowledged in the USB compliance test. However, the acknowledgement is just for the PCM2904/2906 from Texas Instruments. Be careful that the acknowledgement is not for the customer’s USB system using the PCM2904/2906. 30 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. 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