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Cirrus Logic - Evaluation Board

Numéro de référence CDB44L11
Description Evaluation Board
Fabricant Cirrus Logic 
Logo Cirrus Logic 





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CDB44L11 fiche technique
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CDB44L11
Evaluation Board for the CS44L11
Features
23 mW/Channel into 16 at 2.4 V
Variable power supplies from 1.8 V to 2.4 V
Digital bass boost and treble boost
Programmable digital volume control
Short circuit protection
>90% amplifier efficiency
Description
The CDB44L11 is an excellent means to quickly demon-
strate the CS44L11 Cirrus Digital Power Headphone
Amplifier IC. Analysis requires only a digital signal
source and an analog signal analyzer.
I
As shown below, the CS44L11 takes PCM digital audio
input and converts it to a PWM output. This 16-pin
TSSOP IC provides volume up/down, treble boost, bass
boost and mute functions via push buttons and a micro
controller using an I²C interface. A RS232 interface is
provided for programming the micro controller.
The CS8420 is a receiver and sample rate converter. It
takes in the S/PDIF at a range of input sample rates and
generates a PCM output signal at a fixed sample rate.
The low pass filter removes high frequency components
from the output PWM signal effectively converting it from
digital to analog.
ORDERING INFORMATION
CDB44L11
Demonstration Board
MCLK
Clock
Divider
LRCK
and
SCLK
S/PDIF IN CS8420
I2S
4
CS44L11
Control
Buttons 8
uC
2
I2C
2
LED Indicators
5
Low Pass
Filter
Low Pass
Filter
16
Headphones
http://www.cirrus.com
©Copyright Cirrus Logic, Inc. 2004
(All Rights Reserved)
APR ‘04
DS640DB1
1

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