Reflective Color Sensor Assembly

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:
•
•
•
•
•
Block Diagram
Photographic equipment
Colormetry
Chemical analyzers
Display contrast controls
High resolution digital measurement of light
intensity
Light
Current-to-Frequency
Out
Converter
Photodiode Array
S2
S3
6
4
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 [email protected] www.optekinc.com
Issue A.5
6/09
Page 1 of 6
Reflective Color Sensor Assembly
OPB780Z
Absolute Maximum Ratings1, 2 (TA = 25° C unless otherwise noted)
Operating Temperature
TOPR = -30° C to +85° C
Storage Temperature
TSTG = -30° C to +85° C
LED—Absolute Maximum Ratings1, 2 (TA = 25° C unless otherwise noted)
Reverse Voltage
VR = 5 V
Forward Current
IF = 30 mA
PD = 120 mW
Power Dissipation
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.
7,8
SO
S3
6
S1
S2
4
OE
Out
3
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
Pin #
Description
VDD
1, 2
Supply voltage
OUT
3
Output Frequency (FO)
S2
4
Photodiode type selection input
LED Anode
5
LED input
S3
6
Photodiode type selection input
GND
7, 8
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.5 6/09
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 [email protected] www.optekinc.com
Reflective Color Sensor Assembly
OPB780Z
LED
Electro-Optical Characteristics of LED1 (TA = 25°C unless otherwise noted) (See OVLAW4CB7 for more info.)
PARAMETER
MIN
TYP
MAX
UNITS
Luminous Intensity
-
1.0
-
cd
IF = 20 mA
VF
Forward Voltage
2.8
3.4
3.9
V
IF = 5 mA
IR
Reverse Current
-
-
10
µA
VR = 5 V
SYMBOL
IV
(1)
TEST CONDITIONS
Sensor
Recommended Operating Conditions1
SYMBOL
PARAMETER
MIN
TYP
MAX
UNITS
RECOMMENDED CONDITIONS
-
VDD
Supply Voltage
2.7
5
5.5
V
VIH
High-Level Input Voltage
2.0
-
VDD
V
VDD = 2.7 V to 5.5 V
VIL
Low-Level Input Voltage
0.0
-
0.8
V
VDD = 2.7 V to 5.5 V
TA
Operating Free-Air Temperature
Range
-40
-
+70
°C
-
Sensor
Electrical Characteristics1 (TA = 25° C, VDD = 5 V unless otherwise noted)
SYMBOL
VOH
VOL
PARAMETER
High-Level Output Voltage 3
Low-Level Output Voltage
3
MIN
TYP
MAX
UNITS
TEST CONDITIONS
-
4.5
-
V
IOH = -4 mA
-
0.25
-
V
IOL = 4 mA
IIH
High-Level Input Current
-
-
5
µA
-
IIL
Low-Level Input Current
-
-
5
µA
-
IDD
Supply Current
-
2
3
mA
-
600
-
kHz
2
-
Full-Scale Frequency
-
Temperature Coefficient of
Output Frequency
-
±200
-
ppm/°C
Typical Temperature Rise Time
Typical Temperature Fall Time
-
100
-
µ sec.
tr, tf
Power on
λ ≤ 700 nm, -25° C ≤ TA ≤ 70° C / ± 200
ppm/° C
-
Notes:
(1) All voltage values are with respect to GND.
(2) Full-scale frequency is the maximum operating frequency of the device without saturation.
(3) Output interface of device is designed to drive a standard TTL or CMOS logic input over short distances. If lines greater than 12 inches are
used on output, a buffer or line driver is recommended.
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 [email protected] www.optekinc.com
Issue A.5
6/09
Page 3 of 6
Reflective Color Sensor Assembly
OPB780Z
Output Frequency Characteristics1
(VDD = 5 V, TA = 25 °C, IF = 5mA)
Target / Surface
Minimum
Maximum
Units
OPB780Z Sensor Typical Electro-Optical Characteristics
Curves
Red Filter Selected (S2=L/S3=L)
Red
23
41
Green
7
15
Spectral
Response
Photodiode
Spectral
Responsivity
kHz
Blue
3
7
White
-
1.5
Green Filter Selected (S2=H/S3=H)
Red
6
15
Green
6
37
Blue
5
13
White
-
1.5
kHz
Relative Responsivity
1.0
No rmalized to
Clear @ 680 nm
0.9
0.8
0.7
TA = 25° C
0.6
0.5
0.4
0.3
0.2
0.1
0.0
300
500
700
900
1100
λp Wavelength (nm)
Blue Filter Selected (S2=L/S3=H)
4
23
Green
13
21
Blue
21
36
White
-
1.5
kHz
Clear Filter Selected (S2=H/S3=L)
Red
38
71
Green
46
85
Blue
31
60
White
-
5
kHz
Spectral Response
with >700nm Cut-Off Filter (not included)
Relative Responsivity
Red
1.0
0.9
No rmalized to
Clear @ 530 nm
0.8
0.7
TA = 25° C
0.6
0.5
0.4
0.3
0.2
0.1
0.0
300
500
700
900
1100
λp Wavelength (nm)
Notes:
(1) IF = 5 mA, D = 0.225 inch,
(2) All voltage values are with respect to GND.
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Issue A.5 6/09
Page 4 of 6
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747
FAX: (972) 323-2396 [email protected] www.optekinc.com
Reflective Color Sensor Assembly
OPB780Z
OPB780Z Sensor & LED - Typical Electro-Optical Characteristics Curves
Forward Current vs Chromaticity
Coordinate
Sensor Radiation Diagram
0°
10°
20°
0.35
30°
TA = 25°
TA = 25° C
0.34
1 mA
40°
0.33
0.9
50°
0.8
60°
0.32
70°
0.7
90°
0.3
0.1
0.2
0.4
20 mA
50 mA
0.31
80°
0.5
5 mA
Y
1.0
0.30
0.29
0.6
100 mA
0.30
0.31
0.32
0.33
0.34
X
Ambient Temperature vs Chromaticity
Coordinate
LEDSpectrum
Spectrum
0.35
TA = 25° C
IF = 20 mA
1.0
IFP = 20 mA
0.34
0.8
-30° C
0.33
0.6
0° C
Y
Relative Emission Intensity
(a.u.)
1.2
0.4
0.32
50° C
0.2
0.0
350
25° C
0.31
450
550
650
Wavelength λp (nm )
750
0.30
0.29
85° C
0.30
0.31
0.32
0.33
0.34
X
Relative Luminosity (a.u.)
LED Directivity
TA = 25° C
IF = 20 mA
Radiation Angle
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 [email protected] www.optekinc.com
Issue A.5
6/09
Page 5 of 6
Reflective Color Sensor Assembly
OPB780Z
OPB780Z LED - Typical Electro-Optical Characteristics Curves
Forward Current vs Relative
Luminousity
Forward Voltage vs Forward
Current
Relative Lum inousity (a.u.)
Forward Current IFP (mA)
1000
TA = 25o C
100
10
1
2.5
3.0
3.5
4.0
4.5
4.0
3.5
TA = 25o C
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
5.0
Forward Voltage VF (V)
60
80
100
120
Ambient Temperature vs Forward
Voltage
1000
5.4
TA = 25 C
o
Forward Voltage VF (V)
Allowable Forward Current
IFP (mA)
40
Forward Current IFP (mA)
Duty Ratio vs Allowable
Forward Current
100
1
10
IFP = 60 mA
IFP = 20 mA
IFP = 5 mA
5.0
4.6
4.2
3.8
3.4
3.0
2.6
-40 -20
10
100
Ambient Temperature vs Relative
Luminosity
20
40
60
80
100
Ambient Temperature vs Allowable
Forward Current
10.0
40
Allowable Forward Current
IF (mA)
IFP = 20 mA
1.0
0.1
-40
0
Ambient Temperature TA (oC)
Duty Ratio (%)
Relative Luminosity (a.u.)
20
-20
0
20
40
60
80
Ambient Temperature TA (°C)
100
30
20
10
0
0
20
40
60
80
100
Am bient Tem perature TA (oC)
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Issue A.5 6/09
Page 6 of 6
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747
FAX: (972) 323-2396 [email protected] www.optekinc.com