AD1881A

Obsolete

AC’97 SoundMAX® Codec

Data Sheet (Rev. 0) Product Selection Table

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Overview

Mobile Low Power Mixer Mode
Digital Audio Mixer Mode
Full Duplex Variable 8 kHz to 48 kHz Sampling Rate with 1 Hz Resolution

PHAT™ Stereo 3D Stereo Enhancement
Split Power Supplies (3.3 V Digital/5 V Analog)
Extended 6-Bit Master Volume Control
Audio Amp Power-Down Signal

The AD1881A meets the Audio Codec ’97 2.0 and 2.1 Extensions. In addition, the AD1881A SoundMAX Codec is designed to meet all requirements of the Audio Codec ’97, Component Specification, Revision 1.03, © 1996, Intel Corporation, found on Intel's web site. The AD1881A also includes some other Codec enhanced features such as the built-in PHAT Stereo 3D enhancement.

The AD1881A is an analog front end for high performance PC audio applications. The AC’97 architecture defines a 2-chip audio solution comprising a digital audio controller, plus a high quality analog component that includes Digital-to-Analog Converters (DACs), Analog-to-Digital Converters (ADCs), mixer and I/O.

The main architectural features of the AD1881A are the high quality analog mixer section, two channels of ΣΔ ADC conversion, two channels of ΣΔ DAC conversion with Data Direct Scram-bling (D²S) rate generators. The AD1881A’s left channel ADC and DAC are compatible for modem applications supporting irra-tional sample rates and modem filtering requirements.

Four Analog Line-Level Stereo Inputs for Connection from LINE,CD,VIDEO,and AUX

Two Analog Line-Level Mono Inputs for Speakerphone and PC BEEP

Mono MIC Input Switchable from Two External Sources

High Quality CD Input with Ground Sense

Stereo Line-Level Output

Mono Output for Speakerphone or Internal Speaker

Power Management Support