4:2*
CS42436
108 dB, 192 kHz 6-In, 6-Out TDM CODEC
FEATURES GENERAL DESCRIPTION
Six 24-bit A/D, Six 24-bit D/A Converters The CS42436 CODEC provides six multi-bit ana-
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
and outputs, in a 52-pin MQFP package.
102 dB Single-Ended
Six fully differential, or single-ended, inputs are avail-
DAC Dynamic Range
able on stereo ADC1, ADC2, and ADC3. When
108 dB Differential
operating in Single-ended Mode, an internal MUX be-
fore ADC3 allows selection from up to four single-ended
105 dB Single-Ended
inputs. Digital volume control is provided for each ADC
ADC/DAC THD+N
channel, with selectable overflow detection.
-98 dB Differential
All six DAC channels provide digital volume control and
-95 dB Single-Ended
can operate with differential or single-ended outputs.
An auxiliary serial input is available for an additional two
Compatible with Industry-Standard Time
channels of PCM data.
Division Multiplexed (TDM) Serial Interface
The CS42436 is available in a 52-pin MQFP package in
DAC Sampling Rates up to 192 kHz
Commercial (-10C to +70C) and Automotive (-40C to
+105C) grades. The CDB42438 Customer Demonstra-
ADC Sampling Rates up to 96 kHz
tion Board is also available for device evaluation and
Programmable ADC High-Pass Filter for DC
implementation suggestions. Please refer to Ordering
Offset Calibration
Information on page62 for complete ordering
information.
Logarithmic Digital Volume Control
The CS42436 is ideal for audio systems requiring wide
Hardware Mode or Software IC & SPI dynamic range, negligible distortion and low noise, such
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
Input Master Oversampling 4
Filter
Filters
Clock
ADC1&2
Differential or
4
Single-Ended
Multibit Analog Inputs
High Pass
TDM Serial Audio Digital
2
Oversampling
Output Filter Filters
ADC3
2
*Optional MUX allows selection from up to 4 single-ended inputs.
Mar '17
Copyright Cirrus Logic, Inc. 2017
(All Rights Reserved)
DS647F4
CS42436
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 ADC3 Analog Input ................................................................................................................ 28
5.2.3 Hardware Mode ..................................................................................................................... 29
5.2.4 Software Mode ...................................................................................................................... 29
5.2.5 High-Pass Filter and DC Offset Calibration ........................................................................... 29
5.2.5.1 Hardware Mode ......................................................................................................... 29
5.2.5.2 Software Mode ........................................................................................................... 29
5.3 Analog Outputs ............................................................................................................................... 30
5.3.1 Initialization ............................................................................................................................ 30
5.3.2 Line-Level Outputs and Filtering ........................................................................................... 30
5.3.3 Digital Volume Control ........................................................................................................... 32
5.3.3.1 Hardware Mode ......................................................................................................... 32
5.3.3.2 Software Mode ........................................................................................................... 32
5.3.4 De-Emphasis Filter ................................................................................................................ 32
5.4 System Clocking ............................................................................................................................. 33
5.4.1 Hardware Mode ..................................................................................................................... 33
5.4.2 Software Mode ...................................................................................................................... 33
5.5 CODEC Digital Interface ................................................................................................................. 33
5.5.1 TDM ....................................................................................................................................... 33
5.5.2 I/O Channel Allocation ........................................................................................................... 34
5.6 AUX Port Digital Interface Formats ................................................................................................ 34
5.6.1 Hardware Mode ..................................................................................................................... 34
5.6.2 Software Mode ...................................................................................................................... 34
5.6.3 IS .......................................................................................................................................... 35
5.6.4 Left-Justified .......................................................................................................................... 35
5.7 Control Port Description and Timing ............................................................................................... 35
5.7.1 SPI Mode ............................................................................................................................... 35
5.7.2 IC Mode ................................................................................................................................ 36
2 DS647F4