IDTSTAC9752AXNAED1X IDT, Integrated Device Technology Inc, IDTSTAC9752AXNAED1X Datasheet - Page 7

• Manufacturer Part Number: IDTSTAC9752AXNAED1X
• Description: IC CODEC AC'97 MIC/JACK 32-QFN
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Audio Codec '97r

Specifications of IDTSTAC9752AXNAED1X

• Resolution (bits): 20 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• S/n Ratio, Adcs / Dacs (db) Typ: 85 / 92
• Voltage - Supply, Analog: 3.14 V ~ 3.47 V; 4.75 V ~ 5.25 V
• Voltage - Supply, Digital: 3.14 V ~ 3.47 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: STAC9752AXNAED1X

IDT™
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
STAC9752A/9753A
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
The STAC9752A/9753A are standard 2-channel stereo CODEC. With IDT’s headphone drive capa-
bility, headphones can be driven without an external amplifier.
The STAC9700/21/44/56/08/84/50/66 may be used as a secondary or tertiary CODEC, with the
STAC9752A/9753A 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 LQFP or in the 32-pad/pin QFN, the STAC9752A/9753A can
be placed on motherboards, daughter boards, PCI, AMR, CNR, MDC or ACR cards.
The STAC9752A/9753A block diagram is illustrated in Figure 1.
The STAC9752A/9753A provides variable sample rate Digital-to-Analog (DA) and Analog-to-Digital
(AD) conversion, mixing, and analog processing. Supported audio sample rates include 48KHz,
44.1KHz, 32KHz, 22.05KHz, 16KHz, 11.025KHz, and 8KHz; additional rates are supported in
the STAC9752A/9753A soft audio drivers All ADC's and DAC's operate at 20-bit resolution.
Two 20-Bit DACs convert the digital stereo PCM_OUT content to audio. The MIXER block combines
the PCM_OUT with any analog sources to drive the LINE_OUT and HP_OUT outputs. The
MONO_OUT delivers either mic only, or a mono mix of sources from the MIXER. The stereo, vari-
able-sample-rate, 20-bit ADCs provide record capability for any mix of mono or stereo sources, and
deliver a digital stereo PCM-in signal back to the AC-Link. The microphone input in mono mode and
the mono mix input can be recorded simultaneously, thus allowing for an all digital output in support
of the digital-ready initiative. For a digital-ready record path, the microphone is connected to the left
channel ADC while the mono output of the stereo mixer is connected to right channel ADC.
The STAC9752A/9753A includes full Stereo Microphone Pre-Amp support and can be used with the
10, 20 and 30dB Microphone Boost options. This integration allows for additional cost savings and
options.
The STAC9752A/9753A also includes IDT’s Universal Jacks
ity. The STAC9752A/9753A includes internal jack sensing using proprietary current- and imped-
ance-sensing techniques. The impedance load on any of the inputs or outputs, including the
Headphone and Line Outputs, can be detected. This enables jack sensing on the Headphone and
Line_Out. The STAC9752A/9753A jack sense can detect the presence of devices on the Head-
phone and Line Outputs and on both Mic inputs.
The STAC9752A/9753A implementation of jack sense uses the Extended Paging Registers defined
by the AC'97 2.3 Specification. This allows for additional registry space to hold the identification
information about the CODEC, the jack sensing details and results, and the external surroundings of
the CODEC. The information within the Extended Paging Registers will allow for the automatic con-
figuration of the audio subsystem without end-user intervention. For example, the BIOS can popu-
late the Extended Paging Registers with valuable information for both the audio driver and the
operating system such as gain and attenuation stages, input population and input phase. With this
input information, the IDT driver will automatically provide to the Volume Control Panel only the vol-
7
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functionality for jack interchangeabil-
STAC9752A/9753A
PC AUDIO
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