UPC2800 Ver la hoja de datos (PDF) - NEC => Renesas Technology

Número de pieza

componentes Descripción

Fabricante

UPC2800

PREAMPLIFIER FOR INFRARED REMOTE CONTROL

NEC => Renesas Technology 

µPC2800A

1. PIN FUNCTION

Pin

Symbol

No.

Pin Name

1 VCC1 Power input pin

Internal Equivalent Circuit

2 OUT Output pin

VCC1

33 kΩ

2

Output transistor

From waveform

shaping circuit

Function

Supply a voltage of 5 V ± 10% to this

pin. If the IC malfunctions due to power

noise, connect a bypass capacitor.

An open-collector output pin (active

low) with a pull-up resistor (33 kΩ TYP.)

Connect an external pull-up resistor of

2.2 kΩ or more, if any, to this pin.

3 VCC2 Power output pin

VCC1

Connect a capacitor of 47 µF or so to

this pin to stabilize the supply voltage to

the internal circuit.

3

4

fO

BPF frequency

setting pin

4

Internal circuit

power line

fO setting

block of BPF

Trimming

resistor

Sets the central frequency of the

internal bandpass filter by an external

resistance (refer to fO vs. R2 Character-

istics in CHARACTERISTIC CURVE).

Use a resistor with excellent accuracy

and temperature characteristics.

5 GND Ground pin

6

CD

Detection

capacitor

connection pin

6

GND pin

Waveform

shaping circuit

BPF

output signal

Connect a smoothing capacitor to this

pin to obtain a DC voltage corresponding

to the output signal level of the internal

bandpass filter.

The 0.01 µF is the most suitable value

for the external capacitor between pin 6

and GND. In case of reducing this

capacitor, confirm that the output pulses

from pin 2 have enough width even if

the longest burst signal is inputted.

3

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