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VIA - Stereo AC97 Codec

Numéro de référence VT1612A
Description Stereo AC97 Codec
Fabricant VIA 
Logo VIA 





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VT1612A fiche technique
VIA
Technologies
Incorporated
Features
• AC’97 2.2 compliant codec
• 18-bit stereo full-duplex Σ∆ codec
• 1Hz resolution VSR (Variable Sampling Rate)
• Integrated IEC958 line driver for S/PDIF output
• S/PDIF compressed digital or LPCM audio out
• 3D stereo expansion for simulated surround
• 18-bit independent rate stereo ADC/DAC
• Hardware VU peak meters for PCM streams
• 4 stereo, 2 mono analog line-level inputs
• Alt. line-level output with volume control, or
• Headphone Amplifier with Thermal Protection
• Low Power consumption mode
• Exceeds Microsoft® WHQL logo requirements
• 3.3V digital, 3.3 or 5V analog power supply
• 48-pin LQFP small footprint package
VT1612A
Stereo AC‘97 Codec with S/PDIF
Description
VIA Technologies’ VT1612ATM 18-bit ¦audio
codec conforms to the AC’97 2.2 and S/PDIF
specifications. The VT1612A integrates Sample
Rate Converters and can be adjusted in 1 Hz
increments. The analog mixer circuitry integrates a
stereo enhancement to provide a pleasing 3D
surround sound effect for stereo media.
Furthermore, an integrated headphone amplifier
with thermal shutdown adds signal value by
reducing the BOM. This codec is designed with
aggressive power management to achieve low power
consumption. When used with a 3.3V analog
supply, power consumption is further reduced. The
primary applications for this part are desktop and
portable personal computers multimedia
subsystems. However, it is suitable for any audio
subsystem requiring stereo audio input / output with
S/PDIF digital output at competitive prices.
PC_BEEP
PHONE
LINE
CD
VIDEO
AUX
MIC1
MIC2
SYNC
BIT_CLK
SDATA_OUT
SDATA_IN
RESET#
XTL_IN
XTL_OUT
FRONT PCM OUT
SRC
M VO
U +20dB
VO MUT
VO MUT
DAC
VO
VO
VO
VO
VO
VO
MUT
MUT
MUT
MUT
MUT
MUT
AC’97
Digital
Interface
S 3D
MAS-
TER
02h
SM
U
04h
MAS-
TER
HP
AMP
SM
U
MONO
VOL-
LINE_OUT
LNL/HP_OUT
MONO_OUT
S
M MAS-
U TER ADC
X INPUT
OSC
PCM IN
SRC
Figure 1. Functional Block Diagram
S/PDIF_OUT
Revision 1.0, October 14, 2002
1
Data Sheet
Free Datasheet http://www.datasheet4u.com/

PagesPages 30
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