EPC100 Datasheet, PDF (1/9 Pages) Espros Photonics corp – Light-Curtain Device with 2-Wire Bus Interface

epc100
Light-Curtain Device with 2-Wire Bus Interface
General Description
Feature
The epc10x chip set is a general purpose CMOS integrated circuit  Light pulse receiver
for light-curtain applications. epc100 is used on the receiver side  Bus transceiver
(Rx) whereas epc 101 is on the emitter side (Tx). Up to 1023  Advantageous wiring by communication over the power-supply lines
devices may be connected to two respectively four wires in paral-  High sensitive input for photo-diode current signals, typ. 60nA
lel. Each device can be individually addressed by an epc100 chip  Scan period down to 30 µs
which acts as the interface between a microcontroller and the 2-  integrated clock generator
wire bus. It manages the bus traffic between the microcontroller  CSP10 package with very small footprint and standard QFN16 pack -
and the individual Rx and Tx elements. Programmable fuses i.e.
age available
for the address, sensitivity, LED light pulse width, etc. allow the
device to be parametrized in the final system (OTP memory).
Applications
Each chip can be put into 'standby mode' or 'operating mode' to re-
duce power consumption. During 'standby mode', power consump- _{ Light barriers ranging from millimeters to tens of meters}
tion is reduced and the photo diode is shorted.
 Light curtains
 Smoke detectors
Refer to the separate Data Sheet of the epc101 transmitter chip _{ Liquid detectors}
and to the Reference Manual epc10x for implementation, usage
and configuration information.
Functional Block Diagram
VDD
VDD33
VDD18
GND
2-wire COM
Interface
Parameter
Memory
Processor
SPI
Signal
Controller
Processor
f
CS
SI
SO SC
PD
D1
© 2011 ESPROS Photonics Corporation
1
Characteristics subject to change without notice
Datasheet epc100 - V2.1
www.espros.ch