Preamplifier for Remote Control Signal Reception

Description

The CXA1511L/M is a bipolar IC used for

preamplifiers that receive signals in infrared remote

control systems. These ICs consist of a first-stage

amplifier, limiter amplifier, band-pass filter, band

elimination filter, signal waveform detection circuit

and waveform shaping circuit.

Features

• Filters (center frequency can be varied through

external resistor: fo = 30kHz to 60kHz, 40kHz typ.)

• Elimination of inductors prevents magnetic field

inductance interference.

• Optical reception diode can be coupled directly.

• Collector output (pull-up resistor, TTL and CMOS

can be connected directly)

Applications

TVs, VCRs, audio equipment

Structure

Bipolar silicon monolithic IC

Block Diagram and Pin Configuration

Absolute Maximum Ratings

• Supply voltage

7V

• Operating temperature

Topr –20 to +75

°C

• Storage temperature

Tstg –65 to +150

°C

• Allowable power dissipation

600

mW (SIP)

• Allowable power dissipation

300 mW (SOP)

Operating Conditions

• Supply voltage

4.7 to 5.3

V

– 1 –

E94301A8X

Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by

any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the

operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.

CXA1511L/M

8 pin SIP (Plastic)

8 pin SOP (Plastic)

4

6

8

1

2

7

3

5

C1

C2 GND fo N.C.

OUT

470, 680

0.01µ

0.01µ

200k

(fo = 40kHz)

Hysteresis

Comparator

Delector &

Comparator Integralor

BPF

BEF

Limiter

Amp

Head

Amp

IN

Photo

Diode

ABLC