OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Incremental Shaft Encoder
OPE1275S Single Channel (Tachometer)
OPE2275S Dual Channel
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 10/09
Page 3 of 4
Electrical Characteristics (T
A
= 25°C unless otherwise noted — for reference only)
SYMBOL PARAMETER MIN TYP MAX UNITS TEST CONDITIONS
V
CC
Supply Voltage 4.5 5.0 5.5 V
I
CC
Supply Current - 21 27 mA V
CC
= 5.0 volts
V
OH
High Level Output Voltage Vcc-0.5 - - V I
C
= 100 µA
V
OL
Low Level Output Voltage - - 0.4 V I
C
= 20 mA
TR Rise Time - 500 - ns 10% to 90%, V
CC
= 5.0 volts
TF Fall Time - 100 - ns 10% to 90%, V
CC
= 5.0 volts
FR Frequency Response - - 60 kHz
H.S. Hole Size 0.10 - - inch
Rotation
Maximum speed of rotation with 1024
holes per rotation
- - 100 rev/sec
Encoding Characteristics:
SE Symmetry Error 0 16 75
°e
QE Quadrature Error—OPE2275 only 0 12 60
Notes:
1. All parameters measured using pulse technique, Vcc = 5.0 volts and T
A
= 25°C.
Absolute Maximum Ratings (T
A
=25°C unless otherwise noted)
Maximum
Units
Storage Temperature Range -40
o
C to +85
o
C
Operating Temperature Range 0
o
C to +85
o
C
Power Supply Voltage V
CC
4.5 to 5.5 V
DC
Power Dissipation
(2)
250 mW
Vibration (5 Hz to 2 kHz) 20 g
Shaft Axial Play ± 0.51 mm [0.02”]
Off-Axis Mounting Tolerance 0.254 mm [0.01”]
Acceleration 250,000 rad/sec
2
Mechanical Specifications:
Dimensions
Units
Moment of Inertia 6.48 X 10
-5
OZ-IN-S
2
Shaft Length 0.3 to 0.7 Inches
