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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.
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
epc130/epc131 are the same devices but with an analog output.
Please refer to the corresponding data sheet epc130/epc131.
Device selection table
Output
digital analog
Model
Light
Reserve
Output
w/o
with
Response
Time
slow
fast
low
Sensitivity
medium
high
very
high
epc130
epc131
epc134
epc135
epc136
epc137
epc138
epc139
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
Functional Block Diagram
OUT
PD
CN
AMP
SIGNAL
PROCESSOR
CONTROLLER
VSS
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
1
Datasheet epc13x digital - V2.1
www.espros.ch
EPC [ ESPROS PHOTONICS CORP ]
