EMP202 datasheet(2/28 Pages) ETC2

2 / 28 page

Single-Chip Dual-Channel AC’97 Audio Codec

EMP202

EMPIA Technology

7/15/2002

Features

High performance CODEC with high S/N ratio (>90 dB).

Compliant with AC’97 2.2 specifications

20-bit stereo Digital-to-Analog Converter with variable sampling rate.

20-bit stereo Analog-to-Digital Converter with variable sampling rate.

4 analog line-level stereo inputs with 5-bit volume control: LINE_IN, CD,

VIDEO, AUX.

2 analog line-level mono inputs: PC_BEEP, PHONE_IN.

Mono output with 5-bit volume control.

Stereo output with 5-bit volume control.

2 MIC inputs are software selectable.

Power management capabilities.

3D Stereo Enhancement

Embedded 50mW/20 Ω OP at LINE output.

External amplifier power down capability.

Digital S/PDIF output.

Built in 14.318M 24.576MHz PLL to save external 24.576MHz crystal

Supports 2 general-purpose I/O pins.

Power supply: Digital: 3.3V; Analog: 5V/3.3V

Standard 48-Pin LQFP Package

1. General Description

The EMP202 is a 2 channel, 20-bit DAC and 20-bit ADC, full duplex AC'97 2.2 compatible stereo

audio CODEC designed for PC multimedia systems, including soft/host audio and riser card based

designs. The EMP202 incorporates proprietary converter technology. The EMP202 AC'97 CODEC

supports with independent variable hardware sampling rates. The EMP202 CODEC provides two

pairs of stereo outputs with independent volume controls, a mono output, a headphone output, and

multiple stereo and mono inputs, along with flexible mixing, gain and mute functions to provide a

complete integrated audio solution for PCs. The EMP202 CODEC operates from a 3.3V power supply

with EAPD (External Amplifier Power Down) control for use in notebook and PC applications. To save

BOM costs, the EMP202 integrates a 50mW/20 Ω headset audio amplifier into the CODEC with

Headphone Output. The EMP202 also supports an AC’97 2.2 compliant SPDIF out function which

allows easy connection from the PC to consumer electronic products. The EMP202 CODEC supports

soft/host audio from Intel 810/815/820/845 chipsets as well as audio controller based VIA/SIS/ALI

chipsets. Windows WDM drivers that support Win95/98.ME/2K/NT and XP provide a complete

solution. Finally, internal PLL circuits generate required timing signals, eliminating the need for

external clocking devices.

EMP202 Datasheet(PDF) 2 Page - List of Unclassifed Manufacturers