EPC111_17 Datasheet, PDF (1/14 Pages) Espros Photonics corp – Fully integrated standalone light barrier driver & receiver

epc111/112
Fully integrated standalone light barrier driver & receiver
General Description
Features
The epc111/112 is a general purpose, fully integrated self-contained
CMOS circuit family to be used in light-barrier applications.
The chip contains a controller which drives an LED, typically an IR-
LED. The LED is used in a pulsed mode to increase the signal-to-
noise ratio even when there is very strong sunlight biasing the photo
diode.
 Fully integrated light barrier chip
 Needs just a photo diode and a LED with a LED driver
 Various types are available, i.e. high sensitivity or high speed
 Integrated clock generator
 CSP10 package with very small footprint
It contains also a high sensitive photo diode amplifier and a signal _Applications
conditioning circuitry to cancel unwanted environmental light including
strong sunlight and pulsed light sources. The receiver is built around a  Light barriers ranging from millimeters to tens of meters
synchronous demodulator circuitry. Two output signals with different  Smoke detectors
threshold levels are implemented in order to trigger the light barrier  Liquid detectors
output or to indicate light reserve.
The chip also includes a power supply circuitry to establish all
internally required voltages from one source only.
It can be used as a standalone device forming the whole core of an
industrial light barrier.
Functional Block Diagram
for 10-Pin Chip Scale Package (for 16-pin QFN Package)
VDD
VDD 1 (9)
VDD33
9 (12)
VDD18
10 (10)
Interface
Parameter
Memory
Processor
Controller
Signal
Processor
f
2 (7)
GND
4 (4)
NC
7 (15)
NC
6 (1) 5 (2)
OUTN OUTH
Figure 1: Block Diagram
Type
epc111
epc112
Response Time
Medium
Fast
Sensitivity
Medium (High)
Medium
Typical Application
Long range light barrier
High speed detection rate
Table 1: Characteristics of available types
V
LED
LED
8 (14)
LED
PD
3 (6)
D1
© 2013 ESPROS Photonics Corporation
1
Characteristics subject to change without notice
Datasheet epc111_112 - V2.5
www.espros.ch