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Cirrus Logic

CS53L21 Datasheet Preview

CS53L21 Datasheet

Stereo Analog-to-Digital Converter

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CS53L21
Low-Power, Stereo Analog-to-Digital Converter
FEATURES
98-dB dynamic range (A-weighted)
–88-dB THD+N
Analog gain controls
– +32-dB or +16-dB mic preamps
– Analog programmable gain amplifier (PGA)
+20-dB digital boost
Programmable automatic level control (ALC)
– Noise gate for noise suppression
– Programmable threshold and
attack/release rates
Independent left/right channel control
Digital volume control
High-pass filter disable for DC measurements
Stereo 3:1 analog input MUX
Dual mic inputs
– Programmable, low noise mic bias levels
– Differential mic mix for common mode
noise rejection
Very low 64 Fs oversampling clock reduces
power consumption
SYSTEM FEATURES
24-bit conversion
4–96 kHz sample rate
Multibit delta–sigma architecture
Low power operation
– Stereo record (ADC): 8.72 mW @ 1.8 V
– Stereo record (mic to PGA and ADC): 13.73
mW @ 1.8 V
Variable power supplies
– 1.8–2.5-V digital and analog
– 1.8–3.3-V interface logic
Power down management
– ADC, mic preamplifier, PGA
Software Mode (I²Cand SPIcontrol)
Hardware Mode (standalone control)
Flexible clocking options
– Master or slave operation
Digital routing mixes
– Mono mixes
1.8 V to 3.3 V
1.8 V to 2.5 V
Hardware Mode 
or I2C & SPI 
Software Mode
Control Data
Reset
Serial Audio 
Output
Digital 
Signal 
Processing
Engine
ALC
High Pass 
Filters
Register 
Configuration
Multibit
Oversampling  MUX PGA
Volume 
Controls
ADC
MUX
+32 dB
Multibit
Oversampling  MUX PGA
+32 dB
ADC
MIC
ALC Bias
Stereo Input 1
Stereo Input 2
Stereo Input 3 / 
Mic Input 1 & 2
http://www.cirrus.com
Copyright Cirrus Logic, Inc. 2005–2015
(All Rights Reserved)
DS700F1
JUL ‘15




Cirrus Logic

CS53L21 Datasheet Preview

CS53L21 Datasheet

Stereo Analog-to-Digital Converter

No Preview Available !

APPLICATIONS
Portable audio players
Digital microphones
Digital voice recorders
Voice recognition systems
Audio/video capture cards
CS53L21
GENERAL DESCRIPTION
The CS53L21 is a highly integrated, 24-bit, 96-kHz, low
power stereo A/D. Based on multibit, delta–sigma mod-
ulation, it allows infinite sample rate adjustment
between 4 kHz and 96 kHz. The ADC offers many fea-
tures suitable for low power, portable system
applications.
The ADC input path allows independent channel control
of a number of features. An input multiplexer selects be-
tween line-level or microphone-level inputs for each
channel. The microphone input path includes a select-
able programmable-gain preamp stage and a low noise
MIC bias voltage supply. A PGA is available for line or
microphone inputs and provides analog gain with soft
ramp and zero cross transitions. The ADC also features
a digital volume attenuator with soft ramp transitions. A
programmable ALC and Noise Gate monitor the input
signals and adjust the volume levels appropriately.
The Signal Processing Engine (SPE) controls left/right
channel volume mixing, channel swap and channel
mute functions. All volume-level changes may be con-
figured to occur on soft ramp and zero cross transitions.
The CS53L21 is available in a 32-pin QFN package in
both Commercial (-10 to +70° C) and Automotive
grades (-40 to +85° C). The CDB53L21 Customer
Demonstration board is also available for device evalu-
ation and implementation suggestions. Please see
“Ordering Information” on page 56 for complete details.
In addition to its many features, the CS53L21 operates
from a low-voltage analog and digital core, making this
A/D ideal for portable systems that require extremely
low power consumption in a minimal amount of space.
2 DS700F1


Part Number CS53L21
Description Stereo Analog-to-Digital Converter
Maker Cirrus Logic
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