CS42432
108 dB, 192 kHz 4-In, 6-Out TDM CODEC
FEATURES GENERAL DESCRIPTION
The CS42432 CODEC provides four multi-bit ana-
Four 24-bit A/D, Six 24-bit D/A Converters
log-to-digital and six multi-bit digital-to-analog
ADC Dynamic Range
delta-sigma converters. The CODEC is capable of op-
105 dB Differential
eration with either differential or single-ended inputs
102 dB Single-Ended
and outputs, in a 52-pin MQFP package.
DAC Dynamic Range Four fully differential, or single-ended, inputs are avail-
able on stereo ADC1 and ADC2. Digital volume control
108 dB Differential
is provided for each ADC channel, with selectable over-
105 dB Single-Ended
flow detection.
ADC/DAC THD+N
All six DAC channels provide digital volume control and
-98 dB Differential can operate with differential or single-ended outputs.
-95 dB Single-Ended
An auxiliary serial input is available for an additional two
channels of PCM data.
Compatible with Industry-Standard Time
The CS42432 is available in a 52-pin MQFP package in
Division Multiplexed (TDM) Serial Interface
Commercial (-10C to +70C) and Automotive (-40C to
DAC Sampling Rates up to 192 kHz
+105C) grades. The CDB42438 Customer Demonstra-
tion Board is also available for device evaluation and
ADC Sampling Rates up to 96 kHz
implementation suggestions. Please refer to Ordering
Programmable ADC High-Pass Filter for DC
Information on page58 for complete ordering
Offset Calibration
information.
Logarithmic Digital Volume Control
The CS42432 is ideal for audio systems requiring wide
dynamic range, negligible distortion and low noise, such
Hardware Mode or Software IC & SPI
as A/V receivers, DVD receivers, and automotive audio
Supports Logic Levels Between 5 V and 1.8 V
systems.
Control Port & Serial
Digital Supply = Analog Supply =
Audio Port Supply =
3.3 V 3.3 V to 5 V
1.8 V to 5 V
Hardware Mode or
2
I C/SPI Software Mode
Control Data
Internal Voltage
Register
Reference
Configuration
Reset
Differential or
Multibit
6
TDM Serial Audio
Volume Digital
Single-Ended
DAC1-3 and
Input
Controls Filters
Modulators
Outputs
Analog Filters
6
Auxilliary Serial
Audio Input
Multibit
High Pass
Digital
2
Input Master Oversampling
Filter
Filters
Clock ADC1
Differential or
2
Single-Ended
Multibit
Analog Inputs
High Pass
TDM Serial Audio Digital
2
Oversampling
Filter
Output Filters
ADC2
2
Copyright Cirrus Logic, Inc. 2013
NOV '13
(All Rights Reserved)
DS673F4
CS42432
TABLE OF CONTENTS
1. PIN DESCRIPTIONS - SOFTWARE MODE ........................................................................................... 6
1.1 Digital I/O Pin Characteristics ........................................................................................................... 8
2. PIN DESCRIPTIONS - HARDWARE MODE ......................................................................................... 9
3. TYPICAL CONNECTION DIAGRAMS .................................................................................................11
4. CHARACTERISTICS AND SPECIFICATIONS .................................................................................... 13
RECOMMENDED OPERATING CONDITIONS ................................................................................... 13
ABSOLUTE MAXIMUM RATINGS .......................................................................................................13
ANALOG INPUT CHARACTERISTICS (COMMERCIAL) .................................................................... 14
ANALOG INPUT CHARACTERISTICS (AUTOMOTIVE) ..................................................................... 15
ADC DIGITAL FILTER CHARACTERISTICS ....................................................................................... 16
ANALOG OUTPUT CHARACTERISTICS (COMMERCIAL) ................................................................17
ANALOG OUTPUT CHARACTERISTICS (AUTOMOTIVE) ................................................................. 18
COMBINED DAC INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE .............................. 20
SWITCHING SPECIFICATIONS - ADC/DAC PORT ............................................................................ 21
SWITCHING CHARACTERISTICS - AUX PORT ................................................................................. 22
SWITCHING SPECIFICATIONS - CONTROL PORT - IC MODE ....................................................... 23
SWITCHING SPECIFICATIONS - CONTROL PORT - SPI FORMAT ................................................. 24
DC ELECTRICAL CHARACTERISTICS .............................................................................................. 25
DIGITAL INTERFACE SPECIFICATIONS & CHARACTERISTICS ..................................................... 25
5. APPLICATIONS ................................................................................................................................... 26
5.1 Overview ......................................................................................................................................... 26
5.2 Analog Inputs .................................................................................................................................. 27
5.2.1 Line-Level Inputs ................................................................................................................... 27
5.2.1.1 Hardware Mode ......................................................................................................... 27
5.2.1.2 Software Mode ........................................................................................................... 27
5.2.2 High-Pass Filter and DC Offset Calibration ........................................................................... 27
5.2.2.1 Hardware Mode ......................................................................................................... 28
5.2.2.2 Software Mode ........................................................................................................... 28
5.3 Analog Outputs ............................................................................................................................... 28
5.3.1 Initialization ............................................................................................................................ 28
5.3.2 Line-Level Outputs and Filtering ........................................................................................... 28
5.3.3 Digital Volume Control ........................................................................................................... 30
5.3.3.1 Hardware Mode ......................................................................................................... 30
5.3.3.2 Software Mode ........................................................................................................... 30
5.3.4 De-Emphasis Filter ................................................................................................................ 30
5.4 System Clocking ............................................................................................................................. 31
5.4.1 Hardware Mode ..................................................................................................................... 31
5.4.2 Software Mode ...................................................................................................................... 31
5.5 CODEC Digital Interface ................................................................................................................. 31
5.5.1 TDM ....................................................................................................................................... 31
5.5.2 I/O Channel Allocation ........................................................................................................... 32
5.6 AUX Port Digital Interface Formats ................................................................................................ 32
5.6.1 Hardware Mode ..................................................................................................................... 32
5.6.2 Software Mode ...................................................................................................................... 32
5.6.3 IS .......................................................................................................................................... 32
5.6.4 Left-Justified .......................................................................................................................... 33
5.7 Control Port Description and Timing ............................................................................................... 33
5.7.1 SPI Mode ............................................................................................................................... 33
5.7.2 IC Mode ................................................................................................................................ 34
5.8 Recommended Power-Up Sequence ............................................................................................. 35
5.8.1 Hardware Mode ..................................................................................................................... 35
5.8.2 Software Mode ...................................................................................................................... 36
2 DS673F4