IDTSTAC9750XXTAEC1XR IDT, Integrated Device Technology Inc, IDTSTAC9750XXTAEC1XR Datasheet - Page 6

• Manufacturer Part Number: IDTSTAC9750XXTAEC1XR
• Description: IC CODEC AC'97 2CH VALUE 48-LQFP
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Audio Codec '97r

Specifications of IDTSTAC9750XXTAEC1XR

• Resolution (bits): 18 b, 20 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• S/n Ratio, Adcs / Dacs (db) Typ: 85 / 89
• 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: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: STAC9750XXTAEC1XR

IDT™
VALUE-LINE TWO-CHANNEL AC’97 CODECS
STAC9750/9751
VALUE-LINE TWO-CHANNEL AC’97 CODECS
1.3.
STAC9750/9751 Block Diagram
isters. The two 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 microphone only, or a mono mix of sources from the MIXER. The
stereo variable sample rate 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 and mono
input can be recorded simultaneously, thus allowing for an all digital output in support of the digital
ready initiative. All ADCs operate at 18-bit resolution and DACs at 20-bit resolution. 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. Make sure the microphone input is not connected to
the stereo mixer when in this mode.
The STAC9750/9751 supports General Purpose Input/Output (GPIO), as well as SPDIF output.
These digital I/O options provide for a number of advanced architectural implementations, with vol-
ume controls and digital mixing capabilities built directly into the CODEC.
The STAC9750/9751 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 STAC9750/9751 to support multiple CODECs in an AC'97 architecture. Additionally, the
STAC9750/9751 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 2/
4-speaker arrangements.
Together with the logic component (controller or advanced core logic chip-set) of AC'97, STAC9750/
9751 can be SoundBlaster
WIN 98/2K/ME/XP.
SoundBlaster is a registered trademark of Creative Labs.
Windows is a registered trademark of Microsoft Corporation.
Multi-Codec
Variable Sample Rate
20-Bit DACs and
SDATA_OUT
18-Bit ADCs
AC-link
SDATA_IN
BIT_CLK
RESET#
SYNC
CID0
CID1
Figure 1. STAC9750/9751 Block Diagram
Management
Interface
64x16 bits
Registers
Digital
Power
®
and Windows Sound System
PCM out DACs
PCM in ADCs
6
DAC
DAC
ADC
ADC
SPDIF
4 stereo
sources
and Gain Control
Analog mixing
MIXER
®
compatible with IDT’s WDM driver for
STAC9750/9751
2 mono
sources
HP_OUT
LINE_OUT
MONO_OUT
0,20 or 30 dB
Mic Boost
Stereo
Mono
M
U
X
PC AUDIO
V 5.8 103106
MIC1
MIC2