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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. 2000
(All Rights Reserved)
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
CS4391
24-Bit, 192 kHz Stereo DAC with Volume Control
Features
l Complete Stereo DAC System: Interpolation,
D/A, Output Analog Filtering
l 108 dB Dynamic Range
l 94 dB THD+N
l Direct Stream Digital Mode
l Low Clock Jitter Sensitivity
l +5 V to +3 V Power Supply
l ATAPI Mixing
l On-Chip Digital De-emphasis for 32, 44.1,
and 48 kHz
l Volume Control with Soft Ramp
– 119 dB Attenuation
– 1 dB Step Size
– Zero Crossing Click-Free Transitions
l 36 mW with 3 V supply
l Direct Interface with 5 V to 1.8 V Logic
Description
The CS4391 is a complete stereo digital-to-analog sys-
tem including digital interpolation, fourth-order delta-
sigma digital-to-analog conversion, digital de-emphasis,
volume control, channel mixing and analog filtering. The
advantages of this architecture include: ideal differential
linearity, no distortion mechanisms due to resistor
matching errors, no linearity drift over time and tempera-
ture and a high tolerance to clock jitter.
The CS4391 accepts PCM data at sample rates from
2 kHz to 192 kHz, DSD audio data, consumes very little
power and operates over a wide power supply range.
These features are ideal for DVD, A/V receivers, CD and
set-top box systems.
ORDERING INFORMATION
CS4391-KZ 20-pin TSSOP -10 to 70 °C
CDB4391 Evaluation Board
I
LRCK
SDATA
(SDA/CDIN)
MCLK
AMUTEC
AOUTA-
AOUTB-
SERIAL
PORT
INTERPOLATION
INTERPOLATOR
(CONTROL PORT)
∆Σ
DAC
DAC
EXTERNAL
ANALOG
FILTER
ANALOG
FILTER
∆Σ
MUTE CONTROL
FILTER
FILTER
RST
SCLK
VOLUME
CONTROL
VOLUME
CONTROL
MIXER
(SCL/CCLK) (AD0/CS)
AOUTA+
AOUTB+
CMOUT
REFERENCE
FILT+BMUTEC
M1
M3
M2
MODE SELECT
M0
APR ‘00
DS335PP3
