CS5345
105 dB, 24-Bit, 192 kHz Stereo Audio ADC
A/D Features
General Description
Multi-bit Delta Sigma modulator
105 dB dynamic range
-95 dB THD+N
Stereo 6:1 Input Multiplexer
Programmable Gain Amplifier (PGA)
– +/- 12 dB gain, 0.5 dB step size
– Zero crossing, click-free transitions
Stereo microphone inputs
– +32 dB gain stage
The CS5345 integrates an analog multiplexer, program-
mable gain amplifier, and stereo audio analog-to-digital
converter. The CS5345 performs stereo analog-to-digital
(A/D) conversion of up to 24-bit serial values at sample
rates up to 192 kHz.
A 6:1 stereo input multiplexer is included for selecting
between line level or microphone level inputs. The mi-
crophone input path includes a +32 dB gain stage and a
low noise bias voltage supply. The PGA is available for
line or microphone inputs and provides gain/attenuation
of 12 dB in 0.5 dB steps.
– Low noise bias supply
The output of the PGA is followed by an advanced 5th-
order, multi-bit delta sigma modulator and digital filter-
ing/decimation. Sampled data is transmitted by the serial
audio interface at rates from 4 kHz to 192 kHz in either
slave or master mode.
Up to 192 kHz sampling rates
Selectable serial audio interface formats
– Left justified up to 24-bit
– I²S up to 24-bit
Integrated level translators allow easy interfacing be-
tween the CS5345 and other devices operating over a
wide range of logic levels.
High pass filter or DC offset calibration
System Features
Power down mode
+3.3 V to +5 V analog power supply, nominal
+3.3 V to +5 V digital power supply, nominal
Direct interface with 1.8 V to 5 V logic levels
Pin-compatible with CS4245
ORDERING INFORMATION
CS5345-CQZ -10° to 70° C 48-pin LQFP
CDB5345
Evaluation Board
3.3 V to 5 V
3.3 V to 5 V
1.8 V to 5 V
I²C/SPI
Left PG A O utput
Right PG A O utput
Internal Voltage
Reference
Control Data
Register C onfiguration
Interrupt
Stereo Input 1
Stereo Input 2
Stereo Input 3
O verflow
Multibit
O versampling
ADC
High Pass
F ilter
Linear Phase
Anti-Alias F ilter
Reset
PG A
+32 dB
+32 dB
MUX
Stereo Input 4 /
Mic Input 1 & 2
Multibit
O versampling
ADC
Serial
Audio
O utput
High Pass
F ilter
Linear Phase
Anti-Alias F ilter
PG A
Stereo Input 5
Stereo Input 6
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Advance Product Information
Copyright Cirrus Logic, Inc. 2004
Cirrus Logic, Inc.
www.cirrus.com
JUNE ‘04
(All Rights Reserved)
DS658A1
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