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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. 1999
(All Rights Reserved)
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
24-Bit Stereo Audio Codec with 3V Interface
Features
l 100 dB Dynamic Range A/D Converters
l 100 dB Dynamic Range D/A Converters
l 105 dB DAC Signal-to-Noise Ratio (EIAJ)
l Analog Volume Control (CS4221 only)
l Differential Inputs / Outputs
l On-chip Anti-aliasing and Output Smoothing
Filters
l De-emphasis for 32, 44.1 and 48 kHz
l Supports Master and Slave Modes
l Single +5 V power supply
l On-Chip Crystal Oscillator
l 3 - 5 V Digital Interface
Description
The CS4220/1 is a highly integrated, high performance,
24-bit, audio codec providing stereo analog-to-digital
and stereo digital-to-analog converters using delta-sig-
ma conversion techniques. The device operates from a
single +5 V power supply, and features low power con-
sumption. Selectable de-emphasis filter for 32, 44.1, and
48 kHz sample rates is also included.
The CS4221 also includes an analog volume control ca-
pable of 113.5 dB attenuation in 0.5 dB steps. The
analog volume control architecture preserves dynamic
range during attenuation. Volume control changes are
implemented using a “soft” ramping or zero crossing
technique.
Applications include digital effects processors, DAT, and
multitrack recorders.
ORDERING INFORMATION
CS4220-KS -10 to +70 °C 28-pin SSOP
CS4221-KS -10 to +70 °C 28-pin SSOP
CDB4220/1 Evaluation Board
I
SCL/CCLK SDA/CDIN AD0/CS MCLK VD VA
RST
LRCK
SCLK
SDIN
SDOUT
DGND AGND
AOUTL+
AOUTL-
AOUTR+
AOUTR-
AINL-
AINL+
AINR-
AINR+
Control Port
Serial Audio Data Interface
Digital Filters
with De-Emphasis
Digital Filters
Left
DAC
Right
DAC
Analog Low Pass
and Output Stage
Voltage
Reference
Left
ADC
Right
ADC
Volume
Control
(
DIF1
)(
DIF0
)(
DEM0
)
IC/SPI
(
DEM1
)
2
Clock OSC
()=CS4220
Volume
Control
V
L
XTI XTO
*
=CS4221
*
*
APR ‘00
DS284PP3
CS4220
CS4221
