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AD1882AJCPZ Arkusz danych(PDF) 10 Page - Analog Devices

Numer części AD1882AJCPZ
Szczegółowy opis  High Definition Audio SoundMAX Codec
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Rev. 0
|
Page 10 of 20
|
August 2008
AD1882A
POWER AND GROUND
DVIO 3.3 V
± 10%
or
DVIO 1.5 V
± 5.5%
4
I
Connect to the I/O Voltage Used for the HD Audio Controller Signals.
DVGPIO
3
I
Connect to 3.3 V digital supply to power the GPIO and S/PDIF pins.
DVSS
7
I
Digital Supply Return (Ground).
DVDD (3.3 V)
9
I
Digital Supply Voltage 3.3 V. This is regulated down to DVCORE on Pin 1 to supply the
internal digital core internal to the AD1882A.
AVDD (3.3 V)
25, 38
I
CAUTION: DO NOT APPLY 5.0 V TO THESE PINS!
Analog Supply Voltage 3.3 V ONLY.
Note: AVDD supplies should be well regulated and filtered as supply noise degrades
audio performance.
MIC_BIAS_IN
33
I
Source Power for Microphone Bias Circuitry. Connect this pin to 5.0 V via a low-pass
filter. When connected this way, the AD1882A is capable of providing 3.9 V as a mic
bias to all of the MIC_BIAS pins. If 5 V is not available, connect this pin to 3.3 V (AVDD)
via a low-pass filter.
AVSS
26, 42
I
Analog Supply Return (Ground). AVSS should be connected to DVSS using a
conductive trace under, or close to, the AD1882A.
Table 6. AD1882A Pin Descriptions (Continued)
Mnemonic
Pin No.
Function
Description
The symbols used in this table are defined as: I = input, O = output, LI = line level input, LO = line level output, HP = output capable of driving
headphone load, MIC = input supports microphones with MIC bias and boost amplifier, SWAP = outputs can swap L/R channels (typically
used to support C/LFE or shared C/LFE function).


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