EPC600 Datasheet, PDF (1/30 Pages) Espros Photonics corp – Time-of-flight range-finder chip

DATASHEET – epc600
Time-of-flight range-finder chip
General Description
The epc600 chip is a general purpose, monolithic, fully integrated
photoelectric CMOS device for optical distance measurement and
object detection. Its working principle is based on the three-dimen-
sional (3D) time-of-flight (TOF) measurement.
The system-on-chip (SOC) contains:
■ A full data acquisition path with the driver for the LED, the photo-
receiver, the signal conditioning, the A/D converter and the signal
processing.
■ An on-chip controller managing the data acquisition and the data
communication.
■ A 2-wire interface for the command and data communication.
■ A supply-voltage power management unit.
Together with a tiny microprocessor and few external components,
a fully functional TOF range-finder can be built.
The working principle is based on the elapsed time-of-flight (TOF)
of a photon (modulated light) emitted by the transmitter (LED) and
reflected back by the object to the photosensitive receiver.
The very high photosensitivity allows operating ranges up to sever-
al meters and an accuracy down to a centimeter depending on the
lens and the illumination power.
Features
■ Complete data acquisition system for distance measurement or
object detection on chip. Allows for minimum part count designs.
■ On-chip high power LED driver.
■ Easy to use operation in combination with a tiny microprocessor.
■ Absolute distance measurement with digital data output.
■ Integrated signal-processing.
■ High sensitivity and resolution for measured distances up to 15m.
■ Response time of less than 1ms possible.
■ Digital data output with 12 bit distance data.
■ Excellent ambient-light suppression up to >100kLux.
■ Integrated ambient-light meter (“Luxmeter”)
e.g. for brightness control or dimmer functions.
■ Voltage supply with low power consumption.
■ Easy to use 2-wire interface with simple command set.
■ Fully SMD-compatible flip-chip CSP24 package with very small
footprint.
Possible Applications
■ Light barrier with powerful ambient-light suppression
■ People and object counting sensor
■ Door opening and safety sensor
■ Limit and proximity switch
■ Machine control and safety sensor
■ Water tap and toilet flushing sensor
■ Single spot parking sensor
■ Distance measurement gauge
Functional Block Diagram
CX1
XTAL
CX2
VDD 8.5V
VDDBS -5.0V
SCLK
SDATA
Voltage
regulator
2-wire
serial
interface
Controller
Signal-
processing
Modulator
RAM
EEPROM
Phase shifter
A
D
Correlator
LED driver
LED
Figure 1: epc600 on-chip data acquisition system for range-finders
© 2014 ESPROS Photonics Corporation
Characteristics subject to change without notice
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Datasheet epc600 - V1.3
www.espros.ch