DATA SHEET
BIPOLAR ANALOG INTEGRATED CIRCUITS
µ
PC2800A
PREAMPLIFIER FOR INFRARED REMOTE CONTROL
DESCRIPTION
The
µ
PC2800A is a receiver preamplifier for infrared remote control systems. It can be directly connected
to a PIN photodiode and integrates a high-gain first-stage amplifier, limiter, bandpass filter, detection circuit,
and waveform shaping circuit to provide a receiver preamplifier on a single chip.
FEATURES
• High reliability due to high-frequency lighting fluorescent lamp
Internal trap circuit
• Internal bandpass filter
Central frequency variable by external resistor: f
O
= 30 to 80 kHz
Few variation of central frequency thanks to f
O
trimming
• Low external components
Internal output pull-up resistor and power supply filter resistor
Only low external capacitance required
• ABLC (Automatic Bias Level Control) circuit
Controls fluctuation of bias level cause by disturbance from external light
• Open-collector output
Open-collector output (active low) with pull-up resistor (33 kΩ TYP.)
ORDERING INFORMATION
Part Number
Package
8-pin plastic SOP (225 mil)
µ
PC2800AGR
The information in this document is subject to change without notice.
Document No. S12974EJ6V0DS00 (6th edition)
Date Published October 1998 N CP(K)
Printed in Japan
The mark
shows major revised points.
©
1992
NEC [ NEC ]
