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Copyright
Cirrus Logic, Inc. 2004
(All Rights Reserved)
http://www.cirrus.com
CS4397
24-Bit, Multi-Standard D/A Converter for Digital Audio
Features
24 Bit Conversion
Up to 192 kHz Sample Rates
120 dB Dynamic Range
-100 dB THD+N
Supports PCM, DSD and External
Interpolation filters
Advanced Dynamic-Element Matching
Low Clock Jitter Sensitivity
Digital De-emphasis for 32 kHz, 44.1 kHz and
48 kHz
External Reference Input
Description
The CS4397 is a complete high performance 24-bit
48/96/192 kHz stereo digital-to-analog conversion sys-
tem. The device includes a digital interpolation filter
followed by a oversampled multi-bit delta-sigma modula-
tor which drives dynamic-element-matching (DEM)
selection logic. The output from the DEM block controls
the input to a multi-element switched capacitor DAC/low-
pass filter, with fully-differential outputs. This multi-bit ar-
chitecture features significantly lower out-of-band noise
and jitter sensitivity than traditional 1-bit designs, and the
advanced DEM guarantees low noise and distortion at
all signal levels.
ORDERING INFORMATION
CS4397-KS
-10° to 70° C
28-pin Plastic SOIC
CS4397-KSZ
-10° to 70° C
28-pin Plastic SOIC Lead free
CDB4397
Evaluation Board
I
SCLK
MCLK
M4
LRCK
SDATA
AOUTL+
AOUTR+
SERIAL INTERFACE
AND FORMAT SELECT
INTERPOLATION
SOFT MUTE
Σ
MODULATOR
DYNAMIC
DE-EMPHASIS
SWITCHED
AOUTL-
AOUTR-
FILT+
FILTER
INTERPOLATION
FILTER
MULTI-BIT
Σ
MODULATOR
MULTI-BIT
ELEMENT
MATCHING
LOGIC
DYNAMIC
ELEMENT
MATCHING
LOGIC
CAPACITOR-DAC
AND FILTER
SWITCHED
CAPACITOR-DAC
AND FILTER
VREF
CMOUT
FILT-
VOLTAGE REFERENCE
HARDWARE MODE CONTROL
CLOCK
DIVIDER
(CONTROL PORT)
(AD0/CS)
M3
M2
(AD1/CDIN)
(SCL/CCLK)
M1
M0
(SDA/CDOUT)
RESET
MUTEC
MUTE
SEP ‘04
DS333F1
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