STAC9704 Datasheet, PDF (1/49 Pages) Hynix Semiconductor – Multimedia Audio Codec for AC97

SigmaTel, Inc.
Integrating Mixed-Signal Solutions
STAC9704/7
Multimedia Audio Codec for AC’97
GENERAL DESCRIPTION:
SigmaTel’s STAC9704/07 is a general purpose 18-bit, full duplex, audio codec that conforms to the analog
component specification of AC’97 (Audio Codec ’97 Component Specification rev. 1.03). The STAC9704/07
incorporates SigmaTel’s proprietary Sigma-Delta technology to achieve signal quality in excess of 95dB SNR.
The DACs, ADCs, and mixers are integrated with analog I/Os, which include four analog line-level stereo inputs,
two analog line-level mono inputs, and 3 output channels. Also included are SigmaTel’s 3D stereo enhancement
(SS3D) and an extra true line-level out for headphones or speaker amplifiers. The STAC9704/07 communicates
via the five wire AC Link to any digital component of AC’97 providing flexibility in the audio system design.
Packaged in a small AC’97 compliant 48-pin TQFP, the STAC9704/07 can be placed on the motherboard,
daughter boards, add-on cards, PCMCIA cards, or outside the main chassis such as in a speaker. The 9707 is
identical to the 9704 except that the 9707 is tested at AVdd = DVdd = 3.3V.
FEATURES:
• High performance Σ ∆ technology
• 18-bit full duplex stereo A/D, D/A
• AC-link protocol compliance
• Single power source from 5V to 3.3V
• AC'97 compliant mixer
• SigmaTel Surround (SS3D) Stereo
Enhancement
• Energy saving power down modes
• 48k sample/second rate
• Six analog line-level inputs
• 48-pin TQFP
• SNR > 95 dB through Mixer and DAC
• STAC9707 is the 3.3 volt version
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10/02/98