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UPC2800AGR Datasheet

  • UPC2800AGR

  • PREAMPLIFIER FOR INFRARED REMOTE CONTROL

  • 12頁

  • NEC   NEC

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碌
PC2800A
1. PIN FUNCTION
Pin
No.
1
Symbol
V
CC1
Pin Name
Power input pin
Internal Equivalent Circuit
Function
Supply a voltage of 5 V
鹵
10% to this
pin. If the IC malfunctions due to power
noise, connect a bypass capacitor.
V
CC1
An open-collector output pin (active
low) with a pull-up resistor (33 k鈩?TYP.)
Connect an external pull-up resistor of
2.2 k鈩?or more, if any, to this pin.
2
OUT
Output pin
33 k鈩?/div>
2
Output transistor
From waveform
shaping circuit
3
V
CC2
Power output pin
V
CC1
Connect a capacitor of 47
碌
F or so to
this pin to stabilize the supply voltage to
the internal circuit.
3
Internal circuit
power line
4
f
O
BPF frequency
setting pin
4
f
O
setting
block of BPF
Trimming
resistor
Sets the central frequency of the
internal bandpass filter by an external
resistance (refer to
f
O
vs. R
2
Character-
istics
in
CHARACTERISTIC CURVE).
Use a resistor with excellent accuracy
and temperature characteristics.
5
6
GND
C
D
Ground pin
Detection
capacitor
connection pin
Waveform
shaping circuit
GND pin
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
碌
F 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.
6
BPF
output signal
3

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