CS5345 Datasheet, PDF (1/39 Pages) Cirrus Logic – 105 DB 24BIT 192 KHZ STEREO AUDIO ADC

CS5345
105 dB, 24-Bit, 192 kHz Stereo Audio ADC
A/D Features
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
– Low noise bias supply
Up to 192 kHz sampling rates
Selectable serial audio interface formats
– Left justified up to 24-bit
– I²S up to 24-bit
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
General Description
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.
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.
Integrated level translators allow easy interfacing be-
tween the CS5345 and other devices operating over a
wide range of logic levels.
ORDERING INFORMATION
CS5345-CQZ -10° to 70° C
CDB5345
48-pin LQFP
Evaluation Board
1.8 V to 5 V
I²C /SPI
C ontrol D ata
Inte rrupt
O ve rflow
Reset
S e rial
A udio
O utput
3.3 V to 5 V
3.3 V to 5 V
Re gister C onfigura tion
H igh P a ss
F ilte r
Line a r P hase
A nti-A lias F ilte r
H igh P a ss
F ilte r
Line a r P hase
A nti-A lias F ilte r
Inte rna l V oltage
Re fe rence
Multibit
O versa mpling
ADC
Multibit
O ve rsa mpling
ADC
PGA
MU X
PGA
+32 dB
+32 dB
Left P G A O utput
R ight P G A O utput
S tere o Input 1
S tere o Input 2
S tere o Input 3
S tere o Input 4 /
Mic Input 1 & 2
S tere o Input 5
S tere o Input 6
Advance Product Information
Cirrus Logic, Inc.
www.cirrus.com
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
© Copyright Cirrus Logic, Inc. 2004
(All Rights Reserved)
JUNE ‘04
DS658A1
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