CS4390
24-Bit, Stereo D/A Converter for Digital Audio
Features
Description
The CS4390 is a complete stereo digital-to-analog out-
put system. In addition to the traditional D/A function, the
CS4390 includes a digital interpolation filter followed by
an 128X oversampled delta-sigma modulator. The mod-
ulator output controls the reference voltage input to an
ultra-linear analog low-pass filter. This architecture al-
lows for infinite adjustment of sample rate between 1 and
50 kHz while maintaining linear phase response simply
by changing the master clock frequency.
24-Bit Conversion
115 dB Signal-to-Noise-Ratio (EIAJ)
Complete Stereo DAC System
— 128X Interpolation Filter
— Delta-Sigma DAC
— Analog Post Filter
106 dB Dynamic Range
Low Clock Jitter Sensitivity
Filtered Line-Level Outputs
— Linear Phase Filtering
The CS4390 also includes an extremely flexible serial
port utilizing mode select pins to support multiple inter-
face formats.
— Zero Phase Error Between Channels
Adjustable System Sampling Rates
— including 32 kHz, 44.1 kHz & 48 kHz
The master clock can be either 256, 384, or 512 times
the input sample rate, supporting various audio
environments.
Digital De-emphasis for 32 kHz, 44.1 kHz, &
48 kHz
Pin-compatible with the CS4329
ORDERING INFORMATION
CS4390-KP -10° to 70° C 20-pin Plastic DIP
CS4390-KS -10° to 70° C 20-pin Plastic SSOP
CDB4390
Evaluation Board
I
DIF0 DIF1 DIF2
20 19 12
DEM0 DEM1
VA
3
VD
6
1
2
7
9
LRCK
SCLK
Serial Input
Interface
De-emphasis
Voltage Reference
MUTE_L
16
10
SDATA
AOUTL+
18
Analog
Low-Pass
Filter
Delta-Sigma
Modulator
Interpolator
DAC
DAC
AOUTL-
17
AOUTR+
14
11
AUTO_MUTE
Analog
Low-Pass
Filter
Delta-Sigma
Modulator
Interpolator
5
AOUTR-
13
8
4
15
DGND
MCLK
AGND
MUTE_R
Cirrus Logic, Inc.
Copyright Cirrus Logic, Inc. 1998
(All Rights Reserved)
Crystal Semiconductor Products Division
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.crystal.com
JUN ‘98
DS264F1
1