CS42888
108 dB, 192 kHz 4-In, 8-Out CODEC
FEATURES GENERAL DESCRIPTION
Four 24-bit A/D, Eight 24-bit D/A Converters
The CS42888 CODEC provides four multi-bit ana-
log-to-digital and eight 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 64-pin LQFP package.
Four fully differential, or single-ended, inputs are avail-
DAC Dynamic Range
able on stereo ADC1and 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 eight DAC channels provide digital volume control
-98 dB Differential
and can operate with differential or single-ended
outputs.
-95 dB Single-Ended
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 CS42888 is available in a 64-pin LQFP package in
System Sampling Rates up to 192 kHz
Commercial (-10C to +70C) and Automotive (-40C to
+105C) grades. The CDB42448 Customer Demonstra-
Programmable ADC High-Pass Filter for DC
tion Board is also available for device evaluation and
Offset Calibration
implementation suggestions. Please refer to Ordering
Information on page61 for complete ordering
Logarithmic Digital Volume Control
information.
IC & SPI Host Control Port
The CS42888 is ideal for audio systems requiring wide
dynamic range, negligible distortion and low noise, such
Supports Logic Levels Between 5 V and 1.8 V
as A/V receivers, DVD receivers, and automotive audio
Popguard Technology
systems.
Control Port & Serial
Digital Supply = Analog Supply =
Audio Port Supply =
3.3 V to 5 V 3.3 V to 5 V
1.8 V to 5 V
2
I C/SPI
Software Mode
Register
Internal Voltage
Control Data
Configuration
Reference
External
Mute
ADC Overflow
Mute Control
Interrupt Control
& Clock Error
Reset
Interrupt
Multibit Differential or
Serial Audio
Volume Digital 8
DAC1-4 and Single-Ended
Input Controls
Filters Modulators
Analog Filters Outputs
8
Auxilliary Serial
Audio Input
Multibit
High Pass
Digital
2
Oversampling
Input Master
Filter Filters
ADC1
Clock
2
Differential or Single-
Ended Analog Inputs
Multibit
High Pass
Serial Audio Digital
2
Oversampling
Filter
Output Filters
ADC2
2
Copyright Cirrus Logic, Inc. 2013
(All Rights Reserved)
CS42888
TABLE OF CONTENTS
1. PIN DESCRIPTIONS ........................................................................................................................ 6
1.1 Digital I/O Pin Characteristics ........................................................................................................... 8
2. TYPICAL CONNECTION DIAGRAM ................................................................................................. 9
3. CHARACTERISTICS AND SPECIFICATIONS .................................................................................... 10
RECOMMENDED OPERATING CONDITIONS ................................................................................... 10
ABSOLUTE MAXIMUM RATINGS .......................................................................................................10
ANALOG INPUT CHARACTERISTICS (COMMERCIAL) .................................................................... 11
ANALOG INPUT CHARACTERISTICS (AUTOMOTIVE) ..................................................................... 12
ADC DIGITAL FILTER CHARACTERISTICS ....................................................................................... 13
ANALOG OUTPUT CHARACTERISTICS (COMMERCIAL) ................................................................14
ANALOG OUTPUT CHARACTERISTICS (AUTOMOTIVE) ................................................................. 15
COMBINED DAC INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE .............................. 17
SWITCHING SPECIFICATIONS - ADC/DAC PORT ............................................................................ 18
SWITCHING CHARACTERISTICS - AUX PORT ................................................................................. 20
SWITCHING SPECIFICATIONS - CONTROL PORT - IC MODE ....................................................... 21
SWITCHING SPECIFICATIONS - CONTROL PORT - SPI FORMAT ................................................. 22
DC ELECTRICAL CHARACTERISTICS .............................................................................................. 23
DIGITAL INTERFACE SPECIFICATIONS & CHARACTERISTICS ..................................................... 23
4. APPLICATIONS ................................................................................................................................... 24
4.1 Overview ......................................................................................................................................... 24
4.2 Analog Inputs .................................................................................................................................. 24
4.2.1 Line-Level Inputs ................................................................................................................... 24
4.2.2 High-Pass Filter and DC Offset Calibration ........................................................................... 25
4.3 Analog Outputs ............................................................................................................................... 25
4.3.1 Initialization ............................................................................................................................ 25
4.3.2 Output Transient Control ....................................................................................................... 27
4.3.3 Popguard ............................................................................................................................... 27
4.3.3.1 Power-Up ................................................................................................................... 27
4.3.3.2 Power-Down .............................................................................................................. 27
4.3.4 Mute Control .......................................................................................................................... 27
4.3.5 Line-Level Outputs and Filtering ........................................................................................... 28
4.3.6 Digital Volume Control ........................................................................................................... 28
4.3.7 De-Emphasis Filter ................................................................................................................ 28
4.4 System Clocking ............................................................................................................................. 29
4.5 CODEC Digital Interface Formats .................................................................................................. 30
4.5.1 IS .......................................................................................................................................... 31
4.5.2 Left-Justified .......................................................................................................................... 31
4.5.3 Right-Justified ........................................................................................................................ 31
4.5.4 OLM #1 .................................................................................................................................. 31
4.5.5 OLM #2 .................................................................................................................................. 32
4.5.6 TDM ....................................................................................................................................... 32
4.5.7 I/O Channel Allocation ........................................................................................................... 33
4.6 AUX Port Digital Interface Formats ................................................................................................ 33
4.6.1 IS .......................................................................................................................................... 33
4.6.2 Left-Justified .......................................................................................................................... 33
4.7 Control Port Description and Timing ............................................................................................... 33
4.7.1 SPI Mode ............................................................................................................................... 34
4.7.2 IC Mode ................................................................................................................................ 34
4.8 Interrupts ........................................................................................................................................ 36
4.9 Recommended Power-Up Sequence ............................................................................................. 36
4.10 Reset and Power-Up .................................................................................................................... 36
4.11 Power Supply, Grounding, and PCB Layout ................................................................................ 36
2 DS717F3