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AD1881A Datasheet(PDF) 8 Page - Analog Devices |
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AD1881A Datasheet(HTML) 8 Page - Analog Devices |
8 / 26 page AD1881A –8– REV. 0 PIN FUNCTION DESCRIPTIONS Digital I/O Pin Name LQFP I/O Description XTL_IN 2 I Crystal (or Clock) Input, 24.576 MHz. XTL_OUT 3 O Crystal Output. SDATA_OUT 5 I AC-Link Serial Data Output, AD1881A Input Stream. BIT_CLK 6 O AC-Link Bit Clock. 12.288 MHz Serial Data Clock. Daisy Chain Output Clock. SDATA_IN 8 O AC-Link Serial Data Input. AD1881A Output Stream. SYNC 10 I AC-Link Frame Sample Sync 48 kHz Fixed Rate. RESET 11 I AC-Link Reset. AD1881A Master H/W Reset. Miscellaneous Connections Pin Name LQFP I/O Description CS0 45 I Chip Select 0. CS1 46 I Chip Select 1. EAPD 47 O External Amp Power-Down Control Signal, Default LO, Active HI MODE 48 I MODE Select. Analog I/O These signals connect the AD1881A component to analog sources and sinks, including microphones and speakers. Pin Name LQFP I/O Description PC_BEEP 12 I PC Beep. PC Speaker Beep Passthrough. PHONE_IN 13 I Phone. From Telephony Subsystem Speakerphone or Handset. AUX_L 14 I Auxiliary Input Left Channel. AUX_R 15 I Auxiliary Input Right Channel. VIDEO_L 16 I Video Audio Left Channel. VIDEO_R 17 I Video Audio Right Channel. CD_L 18 I CD Audio Left Channel. CD_GND_REF 19 I CD Audio Analog Ground Reference for Pseudo-Differential CD Input. CD_ R 20 I CD Audio Right Channel. MIC1 21 I Microphone 1. Desktop Microphone Input. MIC2 22 I Microphone 2. Second Microphone Input. LINE_IN_L 23 I Line In Left Channel. LINE_IN_R 24 I Line In Right Channel. LINE_OUT_L 35 O Line Out Left Channel. LINE_OUT_R 36 O Line Out Right Channel. MONO_OUT 37 O Monaural Output to Telephony Subsystem Speakerphone. LNLVL_OUT_L 39 O Line-Level Output Left Channel. LNLVL_OUT_R 41 O Line-Level Output Right Channel. Filter/Reference These signals are connected to resistors, capacitors, or specific voltages. Pin Name LQFP I/O Description VREF 27 O Voltage Reference Filter. VREFOUT 28 O Voltage Reference Output 5 mA Drive (Intended for MIC Bias). AFILT1 29 O Antialiasing Filter Capacitor—ADC Right Channel. AFILT2 30 O Antialiasing Filter Capacitor—ADC Left Channel. FILT_R 31 O AC-Coupling Filter Capacitor—ADC Right Channel. FILT_L 32 O AC-Coupling Filter Capacitor—ADC Left Channel. RX3D 33 O 3D PHAT Stereo Enhancement—Capacitor. CX3D 34 I 3D PHAT Stereo Enhancement—Capacitor. |
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