EPC610 Datasheet, PDF (1/34 Pages) Espros Photonics corp – 8x8 pixel 3D TOF imager

DATASHEET – epc610
8x8 pixel 3D TOF imager
General Description
The epc610 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 with an 8x8 pixel TOF CCD array, the signal condition-
ing, the A/D converter and the signal processing.
■ An on-chip controller managing the data acquisition and the data
communication.
■ An SPI interface for the command and data communication.
■ A supply-voltage power management unit.
Together with a microprocessor and few external components, a
fully functional TOF camera can be built. It measures the object
distance individually and simultaneously per pixel. Every pixel con-
tains also the brightness and the ambient-light information from the
object.
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 re-
ceiver computes the “time-of-flight” distance from the time differ-
ence in each pixel individually.
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
■ 8x8 pixel TOF CCD array for low cost application.
■ 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 microprocessor.
■ Integrated signal-processing.
■ Response time of less than 1ms possible.
■ Output data: 12 bit sample data per pixel.
■ 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.
■ SPI interface for command and data transfer.
■ Fully SMD-compatible flip-chip CSP24 package with very small
footprint.
Applications
■ Low cost 3D TOF camera
■ People and object counting sensor
■ Door opening, machine control and safeguard sensor
■ 3D limit and proximity switch. Area scanner
■ 3D distance measurement gauge
■ Volumetric mapping of objects
■ Automatic vehicle guidance
■ Low cost seating position detection in cars
■ Gesture control (man-machine-interface)
Functional Block Diagram
CX1
XTAL
CX2
VDD 8.5V
VDDBS -5.0V
Voltage
regulator
Controller
Modulator
nSS
SCLK
MOSI
MISO
SPI
interface
Signal-
processing
RAM
EEPROM
Phase shifter
A
D
Correlator
LED driver
LED
CCD-Array
8X8
Figure 1: epc610 on-chip data acquisition system for 3D TOF cameras
© 2014 ESPROS Photonics Corporation
Characteristics subject to change without notice
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Datasheet epc610 - V1.7
www.espros.ch