SigmaTel STAC9700
STAC9700 is a general-purpose 18-bit stereo, full duplex, audio codec that is built around the analog component specification of AC'97. The STAC9700 incorporates SigmaTel’s proprietary Sigma-Delta technology to achieve a DAC SNR in excess of 90dB and line through SNR of greater than 95dB. The DACs, ADCs, and mixer are integrated with analog I/Os, which include three analog line-level stereo inputs, two analog line-level mono inputs, one stereo outputs, and one mono output channel.GENERAL DESCRIPTION
: SigmaTel’s Also included is SigmaTel’s 3D stereo enhancement (SS3D) for increased speaker separation when using typical low-cost PC speakers. The STAC9700 is a primary codec, and can be used with the STAC9721/23/44/45 or a 4-channel STAC9708 as the secondary, in multiple codec configurations. This configuration can provide up to six-channel output, delivering AC-3 playback for DVD applications. The STAC9700 communicates via the five-wire AC-Link interface with any AC-Link capable controller or advanced core logic chip-set. Packaged in an AC'97 compliant 48-pin TQFP, the STAC9700 can be placed on motherboards, daughter boards, add-on cards or docking stations.FEATURES
:● High performance Σ ∆ technology
● Energy saving power down modes
● 18-bit full duplex stereo ADC, DACs
● AC-Link protocol compliance
● Low-noise differential CDROM input
● Primary capable in 2.1 system
● Pin compatible with the STAC9704/21
● SigmaTel Surround (SS3D) Stereo Enhancement
● Five analog line-level inputs
● 48-pin TQFP
● SNR > 90 dB through Mixer and DAC
● +3.3V and +5V operation 1 08/06/99 SigmaTel, Inc.