CDB44L11 Cirrus Logic Inc, CDB44L11 Datasheet

CDB44L11

Manufacturer Part Number

CDB44L11

Description

EVALUATION BOARD FOR CS44L11

Manufacturer

Cirrus Logic Inc

Series

Popguard®r

Datasheets

1.CDB44L11.pdf (20 pages)

2.CDB44L11.pdf (20 pages)

Specifications of CDB44L11

Amplifier Type

Class D

Output Type

Headphones, 2-Channel (Stereo)

Max Output Power X Channels @ Load

23mW x 2 @ 16 Ohm

Voltage - Supply

1.8 V ~ 2.4 V

Operating Temperature

-10°C ~ 70°C

Board Type

Fully Populated

Utilized Ic / Part

CS44L11

Description/function

Audio DSPs

Operating Supply Voltage

5 V

Product

Audio Modules

For Use With/related Products

CS44L11

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Lead Free Status / RoHS Status

Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

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Features

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.

http://www.cirrus.com

23 mW/Channel into 16 Ω 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

>90% amplifier efficiency

Buttons

Short circuit protection

Control

S/PDIF IN

MCLK

Evaluation Board for the CS44L11

CS8420

Divider

Clock

LRCK

SCLK

and

LED Indicators

CS44L11

Cirrus Logic, Inc. 2004

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

Low Pass

Filter

CDB44L11

Demonstration Board

Headphones

16 Ω

DS640DB1

APR ‘04

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