AC’97 (Audio Codec ’97) is a specification for audio codecs and associated controllers used in personal computers and other devices. AC’97 was developed by Intel in the late 1990s and has since become a standard for audio interfaces on motherboards, sound cards, and other computer systems.
Part Number: ALC202
Function: AC97 Audio CODEC
Package: LQFP 48 Pin type
Manufacturer: Realteck, Avance Logic
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Description
The ALC202 / ALC202A is an 18-bit, full duplex AC’97 2.2 compatible stereo audio CODEC designed for PC multimedia systems, including host/soft audio and AMR/CNR based designs.
The ALC202 incorporates proprietary converter technology to achieve a high SNR, greater than 90 dB. The ALC202 AC’97 CODEC supports multiple CODEC extensions with independent variable sampling rates and built-in 3D effects. The ALC202 CODEC provides two pairs of stereo outputs with independent volume controls, a mono output, and multiple stereo and mono inputs, along with flexible mixing, gain and mute functions to provide a complete integrated audio solution for PCs
Features
1. Single chip audio CODEC with high S/N ratio (>90 dB)
2. Compliant with AC’97 2.2 & WHQL specifications
3. Support of S/PDIF out is compliant with AC’97 rev2.2 specifications
4. Meets performance requirements for audio on PC2001 systems
5. Meets Microsoft PC99 & WLP 2.0 audio requirements
6. 3D Stereo Enhancement
7. Multiple CODEC extension capability
8. External Amplifier Power Down (EAPD) capability
9. High performance converter technology
Pinouts:
Here are some key points about AC’97 audio codecs:
1. Audio Codec: An AC’97 audio codec is an integrated circuit that performs analog-to-digital (ADC) and digital-to-analog (DAC) conversion for audio signals. It interfaces with the audio controller on the host system to process audio data.
2. Multichannel Audio: AC’97 codecs support multichannel audio configurations, allowing for stereo, 4-channel, 5.1-channel, and other audio setups.
3. Sampling Rates: AC’97 supports various sampling rates for audio playback and recording, including commonly used rates like 44.1 kHz (CD audio), 48 kHz (DVD audio), and more.