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epc134/epc135/epc136/epc137/epc138/epc139

Photo-receiver Amplifier

General Description

The epc13x family products are monolithic, integrated high sensi-

tive photo-diode amplifiers for light-barrier, light-curtain, and the

like applications. It amplifies current pulses from reverse-biased

PIN photodiodes (e.g. BP104 by OSRAM) and discriminates the

amplified input light pulse before driving the open-drain output

stage. The device is controlled by an internal digital controller,

which uses no external clock signal. The power supply of the

device can be connected in anti-polar mode to decrease the wiring

effort in matrix operated light-curtain products. The device has

been optimized to utilize the least count of external components.

This device allows the design of short to long range light barriers

from a few millimeters up to tens of meters.

epc130/epc131 are the same devices but with an analog output.

Please refer to the corresponding data sheet epc130/epc131.

Features



Low current consumption



Digital output



Reverse polarity protection



Two-wire and open drain output interface



High sensitivity (epc135/138)



Fast versions available (epc136/139)



Light reserve output (epc135/136)



High sensitivity and light reserve output (epc134)



CSP6 package with very small footprint and standard QFN16 pack -

age available

Applications



Light barriers ranging from millimeters to tens of meters



Light curtains



Smoke detectors



Liquid detectors



Heart beat monitors

Device selection table

Model

Output

digital analog w/o

fast

high

epc130

x

x

x

epc131

x

x

x

epc134

x

x

x

x

epc135

x

x

x

x

epc136

x

x

x

x

epc137

x

x

x

x

epc138

x

x

x

x

epc139

x

x

x

x

Light

Reserve

Output

Response

Time

Sensitivity

with

slow

low medium

very

high

Functional Block Diagram

SIGNAL

PROCESSOR

OUT

AMP

PD

CN

CONTROLLER

VSS

© 2011 ESPROS Photonics Corporation

Characteristics subject to change without notice

1

Datasheet epc13x digital - V2.1

www.espros.ch