STAC9708 Datasheet, PDF (1/56 Pages) List of Unclassifed Manufacturers – Multi-Channel AC97 Codec With Multi-Codec Option

SigmaTel, Inc.
Integrating Mixed-Signal Solutions
PRELIMINARY
STAC9708/11
Multi-Channel AC'97 Codec
With Multi-Codec Option
GENERAL DESCRIPTION:
SigmaTel’s STAC9708/11 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. 2.1). The STAC9708/11
incorporates SigmaTel’s proprietary Sigma-Delta technology to achieve a DAC SNR in excess of 95dB. The
DACs, ADCs, and mixer are integrated with analog I/Os, which include four analog line-level stereo inputs, two
analog line-level mono inputs, two stereo outputs, and one mono output channel. Also included are two
additional high quality DACs, with independent volume control, for multi-channel applications. With
SigmaTel’s 3D stereo enhancement (SS3D), independently selectable on both LINE OUT and DAC OUT, the
multi-channel mode immerses the user in a richer and livelier listening experience. The STAC9708/11 may be
used as a secondary codec, with the STAC9704/07 as the primary, in a multiple codec configuration conforming
to the AC'97 Rev. 2.1 specification. This configuration can provide true six-channel, AC-3 playback required for
DVD applications. The STAC9708/11 communicates via the five-wire AC-Link to any digital component of
AC'97 providing flexibility in the audio system design. Packaged in an AC'97 compliant 48-pin TQFP, the
STAC9708/11 can be placed on the motherboard, daughter boards, add-on cards or PCMCIA cards.
FEATURES:
• High performance Σ ∆ technology
• Two additional high quality DAC’s
for multi-channel applications
• 18-bit full duplex stereo ADC, DACs
• AC-Link protocol compliance
• Multiple power supply options
• Pin compatible with the STAC9704/07
• SigmaTel Surround (SS3D) Stereo
Enhancement
• Energy saving power down modes
• Multi-Codec option (Intel AC'97 rev 2.1)
• Six analog line-level inputs
• 48-pin TQFP
• SNR > 95 dB through Mixer and DAC
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10/02/98