Cirrus Logic CS42428 - Manual

Copyright  Cirrus Logic, Inc. 2014
(All Rights Reserved)
http://www.cirrus.com
114 dB, 192-kHz 8-Ch CODEC with PLL
Features
 Eight 24-bit D/A, two 24-bit A/D Converters
 114 dB DAC / 114 dB ADC Dynamic Range
 -100 dB THD+N
 System Sampling Rates up to 192 kHz
 Integrated Low-Jitter PLL for Increased System
Jitter Tolerance
 PLL Clock or System Clock Selection
 7 Configurable General-Purpose Outputs
 ADC High-Pass Filter for DC Offset Calibration
 Expandable ADC Channels and One-Line
Mode Support
 Digital Output Volume Control with Soft Ramp
 Digital ±15 dB Input Gain Adjust for ADC
 Differential Analog Architecture
 Supports Logic Levels between 1.8 V and 5 V
General Description
The CS42428 provides two analog-to-digital and eight
digital-to-analog delta-sigma converters, as well as an
integrated PLL.
The CS42428 integrated PLL provides a low-jitter sys-
tem clock. The internal stereo ADC is capable of
independent channel gain control for single-ended or
differential analog inputs. All eight channels of DAC pro-
vide digital volume control and differential analog
outputs. The general-purpose outputs may be driven
high or low, or mapped to a variety of DAC mute con-
trols or ADC overflow indicators.
The CS42428 is ideal for audio systems requiring wide
dynamic range, negligible distortion and low noise, such
as A/V receivers, DVD receivers, and digital speakers.
The CS42428 is available in a 64-pin LQFP package in
Commercial (-10° to +70° C) grades. The CDB42428
Customer Demonstration board is also available for de-
vice evaluation. Refer to
“Ordering Information” on
page 71 .
PLL
Internal Voltage
Reference
RST
GPO1
AD0/CS
SCL/CCLK
SDA/CDOUT
AD1/CDIN
VLC
AOUTA1+
AOUTA1-
AOUTB1+
AOUTA3+
AOUTA3-
AOUTA2-
AOUTB2-
AOUTA2+
AOUTB2+
AOUTB1-
AOUTB3+
AOUTB3-
AOUTA4+
AOUTA4-
AOUTB4+
AOUTB4-
AINL+
AINL-
AINR+
AINR-
FILT+ REFGND VQ
ADC#1
ADC#2
Digital Filter
Digital Filter
Gain & Clip
Gain & Clip
DAC_SCLK
DAC_LRCK
DAC_SDIN4
DAC_SDIN3
DAC_SDIN2
DAC_SDIN1
VLS
DGND VD OMCK RMCK LPFLT
INT
Control
Port
DAC#1
DAC#2
DAC#3
DAC#4
DAC#5
DAC#6
DAC#7
DAC#8
D
igi
ta
l F
ilte
r
Vo
lu
m
e C
o
nt
ro
l
GPO2
GPO3
GPO4
GPO5
GPO6
GPO7
MUTEC
Mute
A
n
al
og
F
ilt
er
VA AGND
Mult/Div
GPO
Le
vel T
ra
n
sla
to
r
DAC S
eri
a
l A
u
di
o
P
o
rt
ADC_SDOUT
ADCIN1
ADCIN2
ADC_LRCK
ADC
Serial
Audio
Port
ADC_SCLK Le
ve
l T
ra
ns
la
to
r
MAR '14
DS605F2
CS42428