CS42438_06 Datasheet, PDF (1/62 Pages) Cirrus Logic – 108 dB, 192 kHz 6-in, 8-out TDM CODEC

CS42438
108 dB, 192 kHz 6-In, 8-Out TDM CODEC
FEATURES
 Six 24-bit A/D, Eight 24-bit D/A Converters
 ADC Dynamic Range
– 105 dB Differential
– 102 dB Single-Ended
 DAC Dynamic Range
– 108 dB Differential
– 105 dB Single-Ended
 ADC/DAC THD+N
– -98 dB Differential
– -95 dB Single-Ended
 Compatible with Industry-Standard Time
Division Multiplexed (TDM) Serial Interface
 DAC Sampling Rates up to 192 kHz
 ADC Sampling Rates up to 96 kHz
 Programmable ADC High-Pass Filter for DC
Offset Calibration
 Logarithmic Digital Volume Control
 Hardware Mode or Software I²C^® & SPI™
 Supports Logic Levels Between 5 V and 1.8 V
GENERAL DESCRIPTION
The CS42438 CODEC provides six multi-bit analog-to-
digital and eight multi-bit digital-to-analog delta-sigma
converters. The CODEC is capable of operation with ei-
ther differential or single-ended inputs and outputs, in a
52-pin MQFP package.
Six fully differential, or single-ended, inputs are avail-
able on stereo ADC1, ADC2, and ADC3. When
operating in Single-ended Mode, an internal MUX be-
fore ADC3 allows selection from up to four single-ended
inputs. Digital volume control is provided for each ADC
channel, with selectable overflow detection.
All eight DAC channels provide digital volume control
and can operate with differential or single-ended
outputs.
An auxiliary serial input is available for an additional two
channels of PCM data.
The CS42438 is available in a 52-pin MQFP package in
Commercial (-10° to +70°) and Automotive (-40° to
+105°) grades. The CDB42438 Customer Demonstra-
tion board is also available for device evaluation and
implementation suggestions. Please refer to “Ordering
Information” on page 61 for complete ordering
information.
The CS42438 is ideal for audio systems requiring wide
dynamic range, negligible distortion and low noise, such
as A/V receivers, DVD receivers, and automotive audio
systems.
Control Port & Serial
Audio Port Supply =
1.8 V to 5 V
Digital Supply =
3.3 V
Hardware Mode or
I²C/SPI Software Mode
Control Data
Reset
Register
Configuration
Analog Supply =
3.3 V to 5 V
Internal Voltage
Reference
TDM Serial Audio
Input
Auxilliary Serial
Audio Input
Input Master
Clock
TDM Serial Audio
Output
http://www.cirrus.com
Volume
Controls
Digital
Filters
∆Σ
Modulators
Multibit
8
DAC1-4 and
Analog Filters
8
Differential or
Single-Ended
Outputs
High Pass
Filter
High Pass
Filter
Digital
Filters
Digital
Filters
Multibit
Oversampling
ADC1&2
Multibit
Oversampling
ADC3
4
4
Differential or
Single-Ended
Analog Inputs
2
2
*Optional MUX allows selection from up to 4 single-ended inputs.
Copyright © Cirrus Logic, Inc. 2006
(All Rights Reserved)
AUGUST '06
DS646F1