stac9272 Integrated Device Technology, stac9272 Datasheet - Page 14

• Manufacturer Part Number: stac9272
• Description: 10-channel High Definition Audio Codec
• Manufacturer: Integrated Device Technology

1. DESCRIPTION
IDT™
STAC9271/9272/9273/9274
10-CHANNEL HIGH DEFINITION AUDIO CODEC
10-CHANNEL HIGH DEFINITION AUDIO CODEC
The STAC927x (STAC9271/9272/9273/9274) family are high fidelity, 10-channel audio CODECs
compatible with the Intel High Definition (HD) Audio Interface (formerly known as “Azalia”). The
STAC927x family of CODECs provides high quality, HD Audio capability to notebook and cost sensi-
tive desktop PC applications.
The STAC927x family incorporates IDT's proprietary technology to achieve a DAC SNR up to
105dB. The higher performance and quality of IDT’s audio solutions brings consumer electronics
level performance to the notebook, desktop and media center PC.
The STAC927x family provides stereo 24- bit, full duplex resolution, supporting sample rates up to
192 KHz by the DAC and ADC. The SPDIF In/Out support sample rates of 96 KHz KHz, 48 KHz and
44.1 KHz plus SPDIF OUT supports 88.2 KHz. Additional sample rates are supported by the driver
software.
The STAC927x family supports all desired ten channel configurations, including switchable Head-
phone Out, and Universal JacksTM func¬tionality for jack detection and re-tasking. The SPDIF inter-
face provides connectivity to Consumer Electronic equipment like Dolby Digital decoders, powered
speakers, mini disk drives or a home entertainment systems. All analog I/O pairs support LINE_IN,
LINE_OUT and MIC.
MIC inputs can be programmed with 0/10/20/30/40dB boost. For more advanced configurations, the
STAC927x family has up to five General Purpose I/O (GPIO) pins. The STAC927x family also pro-
vides a single ended CD input for compatibility with DRM solutions and to support leg¬acy OS
issues.
The STAC927x family integrates a headphone amplifiers on Ports A, B and D. The headphone
amplifier is dedicated to these three outputs for increased flexibility, enhanced user experience, and
reduced implementation costs.
The Universal Jack™ feature allows the CODECs to detect when audio devices are plugged in, and
for the CODECs to be reconfigured to support these devices regardless of which port they are
plugged into. SPDIF input sensing is also supported. The fully parametric IDT SoftEQ can be initi-
ated/disabled upon headphone jack insertion/removal for protection of notebook speakers. Note:
The Jack Detect circuit and component selection are critical for accurate detection of audio jacks on
individual ports. Please see the IDT STAC927x reference design for circuit implementation details.
The STAC927x family operates with a 3.3 V digital supply and a 3.3 V to 5 V analog supply.
The STAC927x family is available in a 48-pin LQFP Environmental (ROHS) packages.
IDT CONFIDENTIAL
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STAC9271/9272/9273/9274 V 1.0 MARCH2007
PC AUDIO