STAC9250 Datasheet, PDF (10/137 Pages) Integrated Device Technology – TWO-CHANNEL HD AUDIO CODEC WITH MODEM & DUAL DIGITAL MICROPHONE INTERFACES

STAC9250/9251
TWO-CHANNEL HD AUDIO CODEC WITH MODEM & DUAL DIGITAL MICROPHONE INTERFACES
PC AUDIO
1.3. Description
The STAC9250/9251 are high fidelity, 2-channel audio CODECs compatible with the Intel High Defi-
nition (HD) Audio Interface. The STAC9250/92511 provide high quality, HD Audio capability to note-
book and cost sensitive desktop PC applications.
The STAC9250/9251 incorporate IDT's proprietary Σ∆ technology to achieve a DAC SNR of 100dB.
The higher performance and quality of IDT’s audio solutions brings consumer electronics level per-
formance to the notebook, desktop and media center PC.
The STAC9250/9251 provide stereo 24-bit, full duplex resolution supporting sample rates up to
192 KHz by the DAC and ADC. The STAC9250/9251 SPDIF In/Out support sample rates of 96 KHz,
48 KHz and 44.1 KHz plus SPDIF_OUT supports 88.2 KHz. Additional sample rates are supported
by the driver software.
The STAC9250/9251 supports flexible configurations including switchable Headphone Out and Uni-
versal Jacks™ functionality for jack detection and re-tasking. The SPDIF interface provides connec-
tivity to Consumer Electronic equipment like Dolby Digital decoders, powered speakers, mini-disk
drives or to a home entertainment system. 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
STAC9250/9251 have four General Purpose I/O (GPIO) pins. The STAC9250/9251 also provide a
single ended CD input for compatibility with DRM solutions and to support legacy OS issues.
The STAC9250/9251 integrate a headphone amplifier, which is available on Ports A and D. The
headphone amplifier is switchable between these two outputs for increased flexibility, enhanced user
experience, and reduced implementation costs.
The Universal Jack capabilities allow the CODECs to detect when audio devices are connected, and
allow the CODECs to be reconfigured to support these devices regardless of which port they are
connected to. SPDIF input sensing is also supported. The fully parametric IDT SoftEQ can be initi-
ated upon headphone jack insertion and 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 STAC9250/9251 reference design for circuit
implementation details.
The STAC9250/9251 operate with a 3.3 V digital supply and a 3.3 V, 4 V, and 5 V analog supply.
The STAC9250/9251 are available in a 48-pin LQFP Environmental (ROHS) package.
IDT™
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TWO-CHANNEL HD AUDIO CODEC WITH MODEM & DUAL DIGITAL MICROPHONE INTERFACES
STAC9250/9251
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