Cs53l21, Applications, General description – Cirrus Logic CS53L21 User Manual
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DS700PP1
CS53L21
APPLICATIONS
Portable Audio Players
Digital Microphones
Digital Voice Recorders
Voice Recognition Systems
Audio/Video Capture Cards
GENERAL DESCRIPTION
The CS53L21 is a highly integrated, 24-bit, 96 kHz, low
power stereo A/D. Based on multi-bit, 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 pre-amplifier 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 fea-
tures a digital volume attenuator with soft ramp
transitions. A programmable ALC and Noise Gate mon-
itor 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 Dem-
onstration board is also available for device evaluation
and implementation suggestions. Please see
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.