Audio Codec with USB Interface, Mono ... - Texas Instruments

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PCM2912A SLES230–SEPTEMBER 2008.......................................................................................................................................................................................... www.ti.com TYPICAL CIRCUIT CONNECTION A bus-powered (Hi-power), +20-dB microphone amplifier application example is shown in Figure 37. REC R12 C17 Mic Mute R13 POWER 24 23 22 21 20 19 18 17 MBIAS PLAY 25 26 27 28 29 30 31 32 PGND V CCP TEST1 TEST0 SSPND MMUTE REC PLAY C14 BGND 1 2 3 4 5 6 7 8 R1 R2 Headphone R11 R10 PCM2912A V BUS D– D+ GND C1 R8 R7 C11 C2 V IN V CCA NC AGND V COM2 FR FL R4 X1 C3 USB Connector 16 15 14 13 12 11 10 9 Microphone NOTE: X 1: 6-MHz crystal resonator C 1, C 8, C 11, C 14, C 17, C 18: 1 μF ceramic C 2, C 3: 10 pF to 33 pF (depending on load capacitance of crystal resonator) C 4, C 5: 100 pF ceramic C 6, C 10: 3.3 μF C 7: 0.1 μF C 9: 0.22 μF electrolytic (depending on required frequency response for microphone input) C 13, C 16: 100 μF electrolytic (depending on required frequency response for headphone output) R 1, R 2: 22 Ω to 33 Ω R 3: 1.5 kΩ R 4: 1 MΩ R 5: 1 kΩ (depending on microphone characteristic) R 7, R 8, R 10, R 11: 3.3 kΩ R 12, R 13: 820 Ω (depending on LED drive current) L 1: 1 μH (DC resistance < 0.6 Ω) It is possible to change maximum power if total power of actual application does not require over 100 mA (set POWER = low to configure as low-power device). C18 L1 C16 MAMP V BUS V R OUT D- V CC R D+ R3 HGND VCCL V DD DGND V L OUT XTO C13 XTI R5 C10 V COM1 Figure 37. USB Headset Application NOTE: The circuit in Figure 37 is for information only. Total board design should be considered in order to meet the USB specification as a USB-compliant product. 26 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): PCM2912A C9 C8 C7 C6 C5 C4
RELATED DOCUMENTATION FROM TEXAS INSTRUMENTS PCM2912A www.ti.com.......................................................................................................................................................................................... SLES230–SEPTEMBER 2008 For additional information concerning the PCM2912A device, see the TI application report, Operating Envronments for PCM2912 Applications (SLAA387), available for download from www.ti.com. Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 27 Product Folder Link(s): PCM2912A
Page 1 and 2: Burr-Brown Audio PCM2912A www.ti.co
Page 3 and 4: ELECTRICAL CHARACTERISTICS All spec
Page 5 and 6: PCM2912A www.ti.com................
Page 7 and 8: PGND V CCP TEST1 TEST0 SSPND MMUTE
Page 9 and 10: FUNCTIONAL BLOCK DIAGRAM MBIAS V IN
Page 11 and 12: ADC Digital High-Pass Filter Freque
Page 13 and 14: DAC Analog FIR Filter Frequency Res
Page 15 and 16: THD+N - Total Harmonic Distortion +
Page 17 and 18: Supply Current Operational Current
Page 19 and 20: Device Configuration Interface #0 E
Page 21 and 22: Endpoints Internal Regulator Clock
Page 23 and 24: INTERFACE SEQUENCE Power-On, Attach
Page 25: Suspend and Resume Sequence D+ (pin
Page 29 and 30: TAPE AND REEL INFORMATION *All dime
Page 31 and 32: POST OFFICE BOX 655303 • DALLAS,

Audio Codec with USB Interface, Mono ... - Texas Instruments

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