EPC134 Datasheet, PDF (1/11 Pages) Espros Photonics corp – Photo-receiver Amplifier

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epc134/epc135/epc136/epc137/epc138/epc139
Photo-receiver Amplifier
General Description
Features
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.
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
This device allows the design of short to long range light barriers
from a few millimeters up to tens of meters.
Applications
epc130/epc131 are the same devices but with an analog output. _
Please refer to the corresponding data sheet epc130/epc131.
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Light barriers ranging from millimeters to tens of meters
Light curtains
Smoke detectors
Liquid detectors
Heart beat monitors
Device selection table
Model
Output
Light
Reserve
Output
digital analog w/o with
epc130
xx
Response
Time
slow fast
x
Sensitivity
low medium high
very
high
epc131
xx
x
epc134 x
x
x
x
epc135 x
xx
x
epc136 x
x
xx
epc137 x
x
x
x
epc138 x
x
x
x
epc139 x
x
xx
Functional Block Diagram
OUT
PD
AMP
SIGNAL
PROCESSOR
CN
CONTROLLER
VSS
© 2011 ESPROS Photonics Corporation
1
Characteristics subject to change without notice
Datasheet epc13x digital - V2.1
www.espros.ch