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