U2538B-MFPG3 데이터 시트보기 (PDF) - Atmel Corporation

부품명

상세내역

제조사

U2538B-MFPG3

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

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. Block Diagram with Typical Circuit

VS

IR Receiver for

Data

Communication

U2538B

U2538B

Input

Amplifier

and filter

Detector

mC

Modulated IR signal

carrier frequency 20 to 60 kHz

minimum 6 pulses/burst

AGC/ATC

Rev. 4717A–IRRC–05/03

1

Share Link: