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AC'97 Audio Codecs A4.06 is an impressive as well as beneficial 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 ALC650 incorporates proprietary converter technology to achieve a high SNR, greater than 90 dB.

The ALC650 AC'97 CODEC supports multiple CODEC extensions with independent variable sampling rates and built-in 3D effects. The ALC650 CODEC provides three 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.

Major Features:

1. High-performance CODEC with high S/N ratio (>90 dB)
2. 18-bit ADC and 20-bit DAC resolution
3. Compliant with AC'97 2.2 specifications
4. 18-bit stereo full-duplex CODEC with independent and variable sampling rate
5. 4 analog line-level stereo inputs with 5-bit volume control: LINE_IN, CD, VIDEO, AUX
6. 2 analog line-level mono inputs: PC_BEEP, PHONE_IN
7. Mono output with 5-bit volume control
8. Stereo output with 5-bit volume control
9. 6 channel slot selectable DAC output for multi-channel applications
10. 2 MIC inputs, which are software selectable
11. Power management capabilities
12. 3D Stereo enhancement
13. Embedded 50mW/20ohm OP at front LINE output
14. External amplifier power down capability
15. Digital S/PDIF output
16. Digital S/PDIF input (ALC650 Rev. E or later)
17. No external crystal/clock required
18. Supports 1 general purpose I/O pin
19. Power supply: digital: 3.3V; analog: 5V/3.3V
20. Standard 48-pin LQFP package