SIGMATEL STAC9750 overview
Sigmatel STAC9750 Value-Line Two-Channel AC'97 CodecTSI's STAC9752A/9753A are general purpose 20-bit, full duplex, audio CODECs conforming to the analog compone...
Manufactured bySIGMATEL
Part number or familySTAC9750
Product groupValue-Line Two-Channel AC'97 Codecs
Product details
Manufactured bySIGMATEL
Product groupValue-Line Two-Channel AC'97 Codecs
DescriptionSigmatel STAC9750 Value-Line Two-Channel AC'97 CodecTSI's STAC9752A/9753A are general purpose 20-bit, full duplex, audio CODECs conforming to the analog component specification of AC'97 (Audio CODEC 97 Component Specification Rev. 2.3). The STAC9752A/9753A incorporates TSI's proprietary SD technology.The AC’97 CODEC is designed to achieve a DAC SNR in excess of 94dB. 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.The STAC9752A/9753A includes digital input/output capability for support of modern PC systems, with an output that supports the SPDIF format. The STAC9752A/9753A is a standard 2-channel stereo CODEC. With TSI’s headphone drive capability, headphones can be driven with without an external amplifier.The STAC9752A/9753A may be used as a secondary CODEC, with the STAC9700/21/56/08/84/50/52 as the primary, in a multiple CODEC configuration conforming to the AC'97 Rev. 2.3 specification. This configuration can provide the true six-channel, AC-3 playback required for DVD applications.The STAC9752A/9753A 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 STAC9752A/9753A can be placed on a motherboard, daughter boards, PCI, AMR, CNR, MDC or ACR cards.The STAC9752A/9753A provides variable sample rate Digital-to-Analog (DA) and Analog-to-Digital (AD) conversion, mixing, and analog processing.
Key Features• High Performance SD Technology• AC’97 Rev 2.3 Complaint• 20-bit Full Duplex Stereo ADC & DACs• Independent Sample Rates for ADC & DACs• 5-Wire AC-Link Protocol Compliance• 20-Bit SPDIF Output• Universal Jacks™• Full Stereo Microphone Pre-Amp• Internal Jack Sensing on Headphone & Line_Out• Internal Microphone Input Sensing• Digital PC Beep Option• Extended AC’97 2.3 Paging Registers• General Purpose I/Os and Crystal Elimination Circuit• Headphone Drive Capability (50 mW per channel)• Switchable Headphone Out (pins 39/41 or 35/36)• 0dB, 10dB, 20dB and 30dB Microphone Boost Capability• +3.3 V (STAC9753A) and +5 V (STAC9752A) Analog Power Supply Options• Pin Compatible with STAC9750/52/66
Key Specifications• Analog LINE_OUT SNR: 94dB• Digital DAC SNR: 92dB• Digital ADC SNR: 85dB• Full-scale Total Harmonic Distortion: 0.002%• Crosstalk Between Input Channels: -70dB• Spurious Tone Rejection: 100dB• Stereo Microphone Input
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Value-Line Two-Channel AC'97 Codecs
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