
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
1
Copyright
Cirrus Logic, Inc. 2000
(All Rights Reserved)
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
FEATURES
AC ‘97 2.0 compatible
20-bit quad output and 18-bit dual stereo input
codec with fixed 48 kHz sampling rate
Dedicated ADC for enhanced digital docking
Three analog line-level stereo inputs for connec-
tion from LINE IN, CD, and AUX
High quality pseudo-differential CD input
Dual stereo line level output with independent 6-
bit volume control
6 General Purpose I/O pins
Meets or exceeds Microsoft's
PC 98 and PC 99
audio performance requirements
CrystalClear
Stereo Enhancement
DESCRIPTION
The CS4294 is an AC ‘97 compatible Audio Codec
designed for PC multimedia systems. Using the in-
dustry leading CrystalClear delta-sigma and
mixed signal technology, the CS4294 is ideal for
PC 98-compliant desktop, notebook, and enter-
tainment PCs, where high-quality audio features
are required. The CS4294 offers four channels of
D/A and A/D conversion along with analog mixing
and stereo enhancement processing. For multi-
channel audio systems, the CS4294 can provide
four audio channels. The CS4294 provides an en-
hanced digital docking mode for portable
applications by providing a dedicated ADC capture
path from the analog input mixer.
ORDERING INFORMATION
CS4294-
KQ
CS4294
-JQ
48-pin TQFP 9x9x1.4mm
48-pin TQFP 9x9x1.4mm
VOL
MUTE
MUTE
MUTE
MUTE
VOL
VOL
VOL
+20dB
DAC
3D
STEREO TO
MONO MIXER
VOL
VOL
OUTPUT
BUFFER
OUTPUT
BUFFER
MASTER VOLUME
ALTERNATE VOLUME
MAIN D/A
CONVERTERS
PCM_OUT
PCM OUT
PATH
STEREO
INPUT
MIXER
STEREO
OUTPUT
MIXER
Σ
Σ
Σ
MIC1
AUX
CD
LINE
Mode Control
SYNC
SDATA_OUT
RESET#
MUTE
VOL
ADC
INPUT
MUX
VOL
MUTE
ADC
MAIN ADC GAIN
ADC
DAC
ALT_LINE_OUT
LINE_OUT
GPIO
BIT_CLK
SDATA_IN
AC-Link Interface
2/
2/
2/
2/
2/
2/
2/
6/
3/
2/
SoundFusion
Audio/Docking
Codec
’
97 (AMC
’
97)
CS4294
FEB
‘
00
DS326PP4