AD1882 查看數據表（PDF） - Analog Devices

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AD1882

High Definition Audio SoundMAX Codec

Analog Devices 

AD1882

Table 6. AD1882 Pin Descriptions (Continued)

Mnemonic

Pin No. Function

Description

POWER AND GROUND

DVI/O (3.3V)

DVSS

DVDD (3.3 V)

AVDD (3.3 V)

3

I

4, 7

I

9

I

25, 38 I

Connect to the I/O Voltage Used for the HD Audio Controller Signals.

Digital Supply Return (Ground).

Digital Supply Voltage 3.3 V. This is regulated down to DVCORE on Pin 1 to supply the

internal digital core internal to the AD1882.

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

AVSS

33

I

26, 42 I

Source Power for Microphone Bias Boost Circuitry.

Analog Supply Return (Ground). AVSS should be connected to DVSS using a

conductive trace under, or close to, the AD1882.

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

OBSOLETE (typically used to support C/LFE or shared C/LFE function).

Rev. A | Page 10 of 16 | April 2008

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