STAC9752 Datasheet, PDF (8/95 Pages) Integrated Device Technology – TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING

STAC9752/9753
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING
ter volume slider to the proper physical output, and SoftEQ configurations. The fully parametric IDT
SoftEQ can be initiated upon jack insertion and sensed impedance levels.
The STAC9752/9753 also offers 2 styles of PC BEEP; Analog and Digital. The digital PC Beep is a
new feature added to the AC’97 Specification Rev 2.3.
The STAC9752/9753 is designed primarily to support stereo (2-speaker) audio. True AC-3 playback
can be achieved for 6-speaker applications by taking advantage of the multi-CODEC option avail-
able in the STAC9752/9753 to support multiple CODECs in an AC'97 architecture. Additionally, the
STAC9752/9753 provides for a stereo enhancement feature, IDT Surround 3D (SS3D). SS3D pro-
vides the listener with several options for improved speaker separation beyond the normal two- or
four-speaker arrangements.
The STAC9752/9753 can be SoundBlaster^® and Windows Sound System^® compatible when used
with IDT’s WDM driver for Windows 98/2K/ME/XP or with Intel/Microsoft driver included with Win-
dows 2K/ME/XP. SoundBlaster is a registered trademark of Creative Labs. Windows is a registered
trademark of Microsoft Corporation.
1.2.
STAC9752/9753 Block Diagram
AC-link
SYNC
BIT_CLK
SDATA_OUT
SDATA_IN
RESET#
Multi-Codec
CID0
CID1
EAPD
Variable Sample Rate
20-Bit DACs and
20-Bit ADCs
Figure 1. Block Diagram
Power
Management
4 stereo
sources
PCM out DACs
2 mono
sources
Stereo
Mono
Digital
Interface
DAC
DAC
MIXER
HP_OUT
LINE_OUT
Registers
64x16 bits
ADC
ADC
PCM in ADCs
GPIO1
GPIO0
Analog mixing ^MONO_OUT
and Gain Control
Mic Boost
0,10,20
or 30 dB
SPDIF
M _MIC1
U
X
MIC2
1.3.
Key Specifications
• Analog LINE_OUT SNR: 90 dB
• STAC9752 DAC SNR: 89 dB
• STAC9753 DAC SNR: 84dB
• STAC9752 ADC SNR: 90 dB
• STAC9753 ADC SNR: 88 dB
• Crosstalk between Input Channels: -70 dB
• Spurious Tone Rejection: 100 dB
IDT™
8
STAC9752/9753
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING
REV 3.3 1206