UPC2800A Datasheet, PDF (1/12 Pages) NEC – PREAMPLIFIER FOR INFRARED REMOTE CONTROL

DATA SHEET
BIPOLAR ANALOG INTEGRATED CIRCUITS
µ PC2800A
PREAMPLIFIER FOR INFRARED REMOTE CONTROL
DESCRIPTION
The µPC2800A 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: fO = 30 to 80 kHz
Few variation of central frequency thanks to fO 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
µPC2800AGR
Package
8-pin plastic SOP (225 mil)
The information in this document is subject to change without notice.
Document No. S12974EJ6V0DS00 (6th edition)
The mark shows major revised points.
Date Published October 1998 N CP(K)
Printed in Japan
©
1992