UPC2800AGR datasheet(4/12 Pages) NEC

部件名	UPC2800AGR

功能描述	PREAMPLIFIER FOR INFRARED REMOTE CONTROL

PDF	12 Pages

Scroll/Zoom	100%

制造商	NEC [NEC]

网页	http://www.nec.com/

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4 / 12 page

µPC2800A

Symbol

Pin Name

Internal Equivalent Circuit

Function

No.

7IN–

First-stage gain

Reverse input pin of the first-stage

setting pin

amplifier.

Connect a capacitor (0.01

µF) to

prevent direct current so that the first-

stage amplifier operates as an AC

amplifier. The gain of the amplifier can

be adjusted by an external resistor (0 to

1 k

Ω) (refer to AV vs. R1 Characteris-

tics in CHARACTERISTIC CURVE).

8IN+

Signal input pin

This pin has an internal impedance of

90 k

Ω (TYP.) and can be directly

connected to a PIN photodiode.

Because this is the input pin of a high-

sensitivity amplifier, exercise care that

noise is not superimposed on this pin.

Keep the wiring length of the cathode of

the PIN photodiode as short as possi-

ble.

2.5 V

90 k

Ω

To limiter

circuit

ABLC

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