CS42324 datasheet(2/71 Pages) CIRRUS

2 / 71 page

DS721A6

CS42324

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

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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