OPTEK OPR5002B Optical comparator array Datasheet

Product Bulletin OPR5001B
January 1998
Optical Comparator Arrays
Type OPR5001B, OPR5002B, OPR5003B
Features
Absolute Maximum Ratings (TA = 25o C unless otherwise noted)
• Surface mountable
• Multiple channels available
• TTL compatible output
• Wide supply voltage range
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55o C to +125o C
Operating temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20o C to +80o C
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 V
Output Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 V
Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 mA
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mW
Soldering Temperature (Vapor Phase Reflow for 30 sec.) . . . . . . . . . . . . . . . . 235o C
Description
The OPR5001B, OPR5002B and
OPR5003B are hybrid sensor arrays
consisting of one, two or three channels
of the Optek OPC8032 Differential
Optical Comparator, (“DOC”) IC.
Specifically designed for encoder
applications, the open collector output
switches based on the comparison of
input photodiode’s light current levels.
Logarithmic amplification of the input
signals makes possible operation over a
wide range of light levels.
The packages are surface mountable
and made from a custom opaque
polyimide which shields the active
devices from stray light. The high
temperature laminate can withstand
multiple exposures to the most
demanding soldering conditions. Wrap
around contacts are gold plated for
exceptional storage and wetting
characteristics.
Replaces OPR5001A Series.
OPC8032 Block Diagram
Optek Technology, Inc.
1215 W. Crosby Road
Carrollton, Texas 75006
9-19
(972) 323-2200
Fax (972) 323-2396
Type OPR5001B, OPR5002B, OPR5003B
Tolerance = ± .005(± .13) unless otherwise noted.
OPR5001B
OPR5002B
OPR5003B
Optek Technology, Inc.
1215 W. Crosby Road
Carrollton, Texas 75006
9-20
(972) 323-2200
Fax (972) 323-2396
Type OPR5001B, OPR5002B, OPR5003B
Electrical Characteristics (TA = 25o C unless otherwise noted)
SYMBOL
ICC
PARAMETER
Supply Current
MIN TYP MAX UNITS
5001
3
7
mA
5002
6
14
mA
5003
9
20
mA
TEST CONDITIONS
NOTES
VCC = 24 V
1
VOL
Low Level Output Voltage
0.3
0.4
V
IOL = 14 mA, VCC = 4.5 V
2
IOH
High Level Output Current
0.1
1.0
µA
VCC = VO = 20.0 V
3
OPT-HYS
Optical Hysteresis
2.0
15.0
40
%
VCC = 5.0 V, IOL = 1.0 mA
4, 7
OPT-OFF
Optical Offset
-40
10
+40
%
VCC = 5.0 V, IOL = 1.0 mA
4, 7
fmax
Frequency Response
300
kHz
tlh
Output Rise Time
2.0
µs
thl
Output Fall Time
500
ns
VCC = 5.0 V
5
6
Notes:
1. Pin (+) = 1.2 µW and Pin (-) = 0.8 µW.
2. Pin (+) = 100.0 nW and Pin (-) = 1.0 µW.
3. Pin (+) = 1.0 µW and Pin (-) 100.0 nW.
4. Pin (-) held at 1.0 µW while Pin (+) is ramped from 0.5 µW to 1.5 µW and back to 0.5 µW.
o
5. Pin (+) modulated from 1.0 µW to 2.0 µW. Pin (-) modulated from 1.0 µW to 2.0 µW with phase shifted 180 with respect to Pin (+). Use 100
kΩ trimpot to set the output signal to 50% duty cycle for maximum operating frequency.
6. Measured between 10% and 90% points.
7. Optical Hysteresis and Optical Offset are found by placing 1.0 µW of light on the inverting photodiode and ramping the light intensity of the
noninverting input from .5 µW up to 1.5 µW and back down. This will produce two trigger points, an upper trigger point and lower trigger point.
These points are used to calculate the optical hysteresis and offset.
These are defined as:
% Optical Hysteresis = 100 x (P rise - P fall)
P in (-)
% Optical Offset
= 100 x (P average - P (-) )
P in (-)
Where:
P in (-) = Light level incident upon the “-”photodiode on the I.C. chip (Pin (-) = 1.0 µW).
P rise = Value of light power level incident upon the “+”photodiode that is required to switch the digital output when the light level is an
increasing level (rising edge).
P fall = Value of light power level incident upon the “+”photodiode that is required to switch the digital output when the light level is a
decreasing level (falling edge).
P average = (P rise + P fall)
Application Circuit
OPR5001B
Notes:
1. A capacitor of a value between .001 to .01 µF connected as close as possible to the trim terminals is recommended if the device
appears to be susceptable to noise transients. These capacitors will reduce fmax. It is left to the user to determine the best
value for the application.
2. The 74LS04 is recommended as a means of isolating the “DOC”comparator circuitry from transients induced by inductive and
capacitive loads.
3. It is recommeded that a decoupling capacitor be placed as close as possible to the device.
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.
1215 W. Crosby Road
Carrollton, Texas 75006
(972)323-2200
Fax (972)323-2396
9-21
Optek Technology, Inc.
1215 W. Crosby Road
Carrollton, Texas 75006
9
(972)323-2200
Fax (972)323-2396
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