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STAC9750 Datasheet(PDF) 1 Page - Integrated Device Technology |
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STAC9750 Datasheet(HTML) 1 Page - Integrated Device Technology |
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1 / 73 page  DATASHEET VALUE-LINE TWO-CHANNEL AC’97 CODECS STAC9750/9751 IDT™ 1 STAC9750/9751 V 5.8 103106 VALUE-LINE TWO-CHANNEL AC’97 CODECS OVERVIEW Value-Line Stereo AC'97 CODECs with headphone drive and SPDIF outputs. FEATURES • Full Duplex Stereo 18-bit ADCs and 20-bit DACs • AC’97 Rev 2.2 Compliant • High Performance Σ∆ Technology • SPDIF Output • Crystal Elimination Circuit • Headphone amplifier • Independent Sample Rates for ADCs & DACs (hardware SRCs) • 20dB or 30dB Microphone Boost Capability • 90dB SNR LINE-LINE • 5-Wire AC-Link Protocol Compliance • Digital-Ready Architecture • General Purpose I/O • +3.3 V (STAC9751) and +5 V (STAC9750) Analog Power Supply Options • Pin Compatible With STAC9700/21/56/66 • IDT Surround (SS3D) Stereo Enhancement • Energy Saving Dynamic Power Modes KEY SPECIFICATIONS • Analog LINE_OUT SNR: 90dB • Digital DAC SNR: 89dB • Digital ADC SNR: 85dB • Full-scale Total Harmonic Distortion: 0.005% • Crosstalk between Input Channels: -70dB • Spurious Tone Rejection: 100dB RELATED MATERIALS • Data Sheet • Reference Designs for MB, CNR, ACR and PCI applications • Audio Precision Performance Plots DESCRIPTION IDT's STAC9750/9751 are general purpose, full duplex, audio CODECs conforming to the analog component spec- ification of AC'97 (Audio CODEC 97 Component Specifica- tion Rev. 2.2). They have 18-bit ADCs and 20-bit DACs. The STAC9750/9751 incorporate IDT's proprietary Σ∆ tech- nology to achieve a DAC SNR in excess of 89dB. 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 STAC9750/9751 include digital input/output capability for support of modern PC systems and also an output that supports the SPDIF format. The STAC9750/9751 is a standard 2-channel stereo CODEC. With IDT’s headphone drive capability, head- phones can be driven with no external amplifier. The STAC9750/9751 may be used as a secondary CODEC, with the STAC9700/21/44/56/08/84/66 as the pri- mary, in a multiple CODEC configuration conforming to the AC'97 Rev. 2.2 specification. This configuration can provide the true six-channel, AC-3 playback required for DVD appli- cations. The STAC9750/9751 communicates via the five-wire AC-Link to any digital component of AC'97, providing flexi- bility in the audio system design. The STAC9750/9751 supports General Purpose Input/Out- put (GPIO), as well as SPDIF output. These digital I/O options provide for a number of advanced architectural implementations, with volume controls and digital mixing capabilities built directly into the CODEC. Packaged in an AC'97 compliant 48-pin TQFP, the STAC9750/9751 can be placed on the motherboard, daughter boards, PCI, AMR, CNR, or ACR cards. |
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