EPC110 Datasheet, PDF (1/27 Pages) Espros Photonics corp – Fully integrated configurable light barrier driver & receiver

epc110
Fully integrated configurable light barrier driver & receiver
General Description
Features
The epc110 is a general purpose, fully integrated self-contained
CMOS circuit 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
 Customer configurable version
for i.e. high sensitivity or high speed applica tions
 Integrated clock generator
 CSP10 package with very small footprint
or standard QFN16 package available
It contains also a high sensitive photo diode amplifier and a signal
conditioning circuitry to cancel unwanted environmental light including
strong sunlight and pulsed light sources. The receiver is built around a _Applications
synchronous demodulator circuitry. Two output signals with different
threshold levels are implemented in order to trigger the light barrier  Light barriers ranging from millimeters to tens of meters
output or to indicate light reserve.
 Smoke detectors
The chip also includes a power supply circuitry to establish all ^{ Liquid detectors}
internally required voltages from one source only.
It can be used either as a standalone device, forming the whole core
of an industrial light barrier. It can also be used together with a micro-
controller (µC) for more advance applications.
Functional Block Diagram
for 10-Pin Chip Scale Package (for 16-pin QFN Package)
VDD33 VDD PROG
VDD 1 (9)
VDD33
9 (12)
VDD18
10 (10)
Interface
Processor
SPI
Controller
Parameter
Memory
Signal
Processor
f
SCK
LED
SCK
8 (14)
V
LED
LED
PD
3 (6)
D1
2 (7)
GND
4 (4)
CS
7 (15)
EN
SI
6 (1) 5 (2)
OUTN OUTH
SO
Configuration
standalone
controlled
Figure 1: Block Diagram
Fix-parameter mode
epc110
“EN” --> epc110
Static parameters
Dynamic mode
µC --> “SPI” --> epc110
µC --> “SPI / EN” --> epc110
Ambient adaptive reading
Internal controlled light barrier read rate
External controlled light barrier read rate
Application
Table 1: Configurations versus applications
© 2011 ESPROS Photonics Corporation
1
Characteristics subject to change without notice
Datasheet epc110 - V2.1
www.espros.ch