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SS6863

IR Preamplifier for Remote Control Systems

FEATURES

Only two external components required other

than the photodiode.

Easy to integrate into modules du

package size.

e to its small

Minimal chance of malfunction due to ambient

light.

Low power consumption.

Band-pass filter center frequency set using an

external resistor

Microcomputer compatible.

APPLICATIONS

IR remote control receivers for consumer

electronic products, such as TVs, VCRs,

VCD/DVD players, audio devices, electric fans,

air-conditioners, etc.

DESCRIPTION

The SS6863 is a high-performance infra-red

remote-control pre-amplifier, offering excellent

interference-suppression capability. The infra-red

pulses received by the photo-diode are processed

by the trans-impedance amplifier and amplified

by the AGC amplifier, limiter amplifier and

band-pass filter. The evaluation stages that follow,

including the comparator, Integrator and schmitt-

trigger, demodulate the transmitted digital signal.

Reduced sensitivity to external interference

is acheived by using short-term boost and long-

term control circuits to prevent Interference

from affecting the output.

TYPICAL APPLICATION CIRCUIT

Photo

Diode

C1

0 .1

µF

Vcc (+5V)

110k

Ω (fo=38kHz)

R1

IN

SS6863

AGND

FO

DGND

OUT

NC

CA

7

6

5

4

3

2

1

VCC 8

IR Remote Control Receiver

Rev.2.02 11/6/2003