CS42324 Datasheet, PDF (2/71 Pages) Cirrus Logic – 10-In, 6-Out, 2 Vrms Audio CODEC

System Features
 Direct Interface with 1.8 V to 3.3 V Logic Levels
 Supports Asynchronous Serial Port Operation
– Two Independent Clock Domains
– ADC, DAC1, and DAC2 can be
Independently Assigned to the Two Clock
Domains
– Each Serial Port Supports Master or Slave
Operation
 Internal Digital Loopback
 +3.3 V Analog Power Supply
 +3.3 V Digital Power Supply
 +9 V to +12 V High-Voltage Power Supply
 Hardware or Software Mode Configuration
– Supports I²C^® and SPI^™ Software Interface
General Description
CS42324
The CS42324 is a highly integrated stereo audio
CODEC. The CS42324 performs stereo analog-to-
digital (A/D) and up to four channels of digital-to-analog
(D/A) conversion of up to 24-bit serial values at sample
rates up to 96 kHz.
A 5:1 stereo input multiplexer is included for selecting
between line-level inputs. The output of the input multi-
plexer is followed by an advanced 3rd-order, multi-bit
delta-sigma modulator and digital filtering/decimation.
Sampled data is transmitted by the serial audio inter-
face at rates from 4 kHz to 96 kHz, in either Slave or
Master Mode.
The D/A converter is based on a 5th-order multi-bit del-
ta-sigma modulator with an ultra-linear low-pass filter
and offers a volume control that operates with a 0.5 dB
step size. It incorporates selectable soft ramp and zero
crossing transition functions to eliminate clicks and
pops.
An integrated 7:1 stereo output multiplexer on each of
the three stereo 2 Vrms line-level outputs is used to se-
lect any of the 5 stereo analog inputs, for analog bypass
support, or the outputs of the 2 internal DACs. Each
2 Vrms output can be muted with the selectable analog
mute function.
Standard 50/15 μs de-emphasis is available for a
44.1 kHz sample rate for compatibility with digital audio
programs mastered using the 50/15 μs pre-emphasis
technique.
Integrated digital level translators allow easy interfacing
between the CS42324 and other devices operating over
a wide range of logic levels.
The CS42324 is available in a 48-pin LQFP package in
Commercial (-40°C to +85°C) and Automotive (-40°C to
+105°C) grades. The CDB42324 Customer Demonstra-
tion board is also available for device evaluation and
implementation suggestions. Please refer to “Ordering
information” on page 71 for complete details.
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