CDB53L21 데이터 시트보기 (PDF) - Cirrus Logic
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CDB53L21 Datasheet PDF : 66 Pages
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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 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 “Ordering
Information” on page 63 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.
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DS700PP1
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