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OPTEK Technologies

OPB780Z Datasheet Preview

OPB780Z Datasheet

Reflective Color Sensor Assembly

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Reflective Color Sensor Assembly
OPB780Z
Features:
High-resolution conversion of light intensity to frequency
Selectable color output frequency
Communicates directly with a microcontroller
Sensor power supply operation (2.7 V to 5.5 V)
LED power separate input
Includes LED, Sensor and interface cable
Description:
The OPB780Z color sensor uses a light-to-frequency converter that combines 64 configurable silicon photodiodes
(on a 144 um center and measuring 120 um x 120 um each), with a white LED in a small, lightweight package that
makes it ideal for using in miniature applications.
The output is a square wave (50% duty cycle) with a frequency directly proportional to reflected light intensity
(irradiance).
The light-to-frequency converter reads an 8 x 8 array of photodiodes that consists of four groups of 16 photodiodes
each, segregated by color: 16 photodiodes with red filters, 16 photodiodes with green filters, 16 photodiodes with
blue filters and 16 clear photodiodes with no filters. Each color’s group of 16 photodiodes is interdigitated to
minimize the effect of non-uniformity of the incident irradiance. Each color’s group is also connected in parallel.
The type of photodiode used during operation is pin-selectable.
The output of the device is designed to drive a standard TTL or CMOS logic input over short distances.
The internal photodiode used by the device is controlled by two logic inputs, S2 and S3. See page 4 for more
information.
A 10 “ [25.4 cm] Flat Flexible Cable (FFC) is included for easy hook-up.
The FFC is designed to interface with an AVX (ELCO) part number 04 6249 0080 00 800 connector.
For more information, contact your local representative or OPTEK.
Applications:
Photographic equipment
Colormetry
Chemical analyzers
Display contrast controls
High resolution digital measurement of light
intensity
Light
Block Diagram
Photodiode Array
S2 S3
64
Current-to-Frequency
Converter
Out
3
Ordering Information
RoHS
OPB780Z OPB780 with 10” Long Flat Flex Cable
KA3128
10” Long Flat Flex Cable
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747
FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com
Issue A.3 04/07
Page 1 of 6




OPTEK Technologies

OPB780Z Datasheet Preview

OPB780Z Datasheet

Reflective Color Sensor Assembly

No Preview Available !

Reflective Color Sensor Assembly
OPB780Z
Absolute Maximum Ratings1, 2 (TA = 25° C unless otherwise noted)
Operating Temperature
Storage Temperature
LED—Absolute Maximum Ratings1, 2 (TA = 25° C unless otherwise noted)
TOPR = -30° C to +85° C
TSTG = -30° C to +85° C
Reverse Voltage
VR = 5 V
Forward Current
IF = 30 mA
Power Dissipation
PD = 120 mW
Peak Forward Current
IFP = 100 mA
Sensor—Absolute Maximum Ratings1, 2 (over operating free-air temperature range unless otherwise noted)
Supply Voltage(VDD)
6V
Input Voltage (all inputs, VI)
-0.3 V to VDD + 0.3 V
Notes:
(1) Stresses beyond those linked under “absolute maximum rating” may cause permanent damage to device. These are only stress
ratings, and functional operating of the device at these (or any other) conditions beyond those indicated in the Recommended Operating
Conditions table shown above may affect the device’s reliability.
(2) All voltage values are with respect to GND.
SO S3 6
S1 S2 4
OE Out 3
7,8
Gnd
VDD 1,2
Cap (0.1µf)
5
LED
DO NOT LOOK DIRECTLY AT LED
WITH UNSHIELDED EYES OR
DAMAGE TO RETINA MAY OCCUR.
Pin Name
VDD
OUT
S2
LED Anode
S3
GND
Pin #
1, 2
3
4
5
6
7, 8
Description
Supply voltage
Output Frequency (FO)
Photodiode type selection input
LED input
Photodiode type selection input
Power supply ground
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Issue A.3 04/07
Page 2 of 6
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747
FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com


Part Number OPB780Z
Description Reflective Color Sensor Assembly
Maker OPTEK Technologies
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