CS4328
18-Bit, Stereo D/A Converter for Digital Audio
Features
General Description
The CS4328 is a complete stereo digital-to-analog out-
put system. In addition to the traditional D/A function,
the CS4328 includes an 8× digital interpolation filter fol-
lowed by a 64× oversampled delta-sigma modulator.
The modulator output controls the reference voltage in-
put to an ultra-linear analog low-pass filter. This
architecture allows for infinite adjustment of sample
rate between 1 kHz and 50 kHz while maintaining lin-
ear phase response simply by changing the master
clock frequency.
The CS4328 also includes an extremely flexible serial
port utilizing two select pins to support four different
interface modes.
The master clock can be either 256 or 384 times the
input word rate, supporting various audio environ-
ments.
•
Complete Stereo DAC System
Rates
•
Adjustable System Sampling & 48kHz
including 32kHz, 44.1kHz
8
×
Interpolation Filter
64
×
Delta-Sigma DAC
Analog Post Filter
•
120 dB Signal-to-Noise Ratio
•
Low Clock Jitter Sensitivity
•
Completely Filtered Line-Level Outputs
Linear Phase Filtering
Interface
•
Flexible Serial Data for Either 16
or 18 bit Input
Zero Phase Error Between Channels
No External Components Needed
ORDERING INFORMATION:
CS4328-KP
0 to 70
°C
28-pin Plastic
CS4328-KS
0 to 70
°C
28-pin Plastic
CS4328-BP
-40 to +85
°C
28-pin Plastic
CS4328-BS
-40 to +85
°C
28-pin Plastic
CDB4328
CS4328 Evaluation Board
DIP
SOIC
DIP
SOIC
DIF0
13
LRCK
BICK
SDATAI
20
19
18
DIF1
12
VD+
16
DGND
17
AGND1
1
VA-
5
VA+
3
28
-VREF
Serial Input
Interface
8x
Interpolator
Delta-Sigma
Delta-Sigma
Modulator
Modulator
Voltage Reference
DAC
TST
RST
10
9
8x
Interpolator
Interpolator
Calibration
Microcontroller
21
CALO
8
CMPI
Delta-Sigma
Delta-Sigma
Modulator
Modulator
Clock Osc/
Divider
14
15
11
22
24
ACKI
DAC
Analog
Low-Pass
Filter
MOSFET
Output
Stage
2
AOUTL
S
R
A
M
Analog
Low-Pass
Filter
MOSFET
Output
Stage
26
AOUTR
4
25
AGND2
AGND3
27
CALI
6
CMPO
XTI XTO CKS ACKO
Crystal Semiconductor Corporation
P.O. Box 17847, Austin, TX 78760
(512) 445-7222 FAX: (512) 445-7581
http://www.crystal.com
Copyright
©
Crystal Semiconductor Corporation 1993
(All Rights Reserved)
OCT ’93
DS62F3
1
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