U2538B-MFPG3Y Ver la hoja de datos (PDF) - Atmel Corporation

Número de pieza

componentes Descripción

Fabricante

U2538B-MFPG3Y

IR Receiver for Data Communication

Atmel Corporation 

Features

• Few External Components

• Low Power Consumption

• Microcomputer Compatible

• Insensitive to Ambient Light and Other Continuous Interferences

Applications

• Keyless Entry Systems

• Remote Control

• Wireless Data Transfer up to 4 kbit/s

IR Receiver for

Data

Communication

1. Description

The IC U2538B is a complete IR receiver for data communication. The useful input

signals are separated by a special input circuit and amplified by a gain-controlled

amplifier. The bandpass filter suppresses the off-band signals. The signal detector,

consisting of a demodulator, an integrator and a Schmitt trigger, forms the input signal

to an output pulse that can be interfaced to a microcomputer. The AGC and the ATC

circuit control the receiver's sensitivity, making it insensitive to ambient light sources.

Figure 1-1. Block Diagram with Typical Circuit

VS

U2538B

U2538B

Input

Amplifier

and filter

Detector

µC

Modulated IR signal

carrier frequency 20 to 60 kHz

minimum 6 pulses/burst

AGC/ATC

Rev. 4717B–IRRC–09/05

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