HEDS-9731#151 Avago Technologies US Inc., HEDS-9731#151 Datasheet - Page 3
![Encoders 2 Channel 360CPR](/photos/31/19/311969/heds-971x-973x_wht_sml.jpg)
HEDS-9731#151
Manufacturer Part Number
HEDS-9731#151
Description
Encoders 2 Channel 360CPR
Manufacturer
Avago Technologies US Inc.
Type
Optical Encoderr
Datasheet
1.HEDS-9731151.pdf
(11 pages)
Specifications of HEDS-9731#151
Number Of Channels
2
Mounting Style
PCB
Supply Voltage
5 V
Product
Optical
Technology
Linear
Termination Style
Solder Pin
Detents
No
Motion
Linear
Index Output
Not Indexed
Encoder Signal
Digital
Built In Switch
No
Operating Supply Voltage (typ)
5VDC
Operating Temperature Min Deg. C
-40C
Operating Temperature Max Deg. C
85C
Terminal Type
PC Pins
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Output Waveforms
Definitions
Count (N) = The number of bar and window pairs or counts
per revolution (CPR) of the codewheel, or the number of
lines per inch of the codestrip (LPI).
1 Shaft Rotation = 360 mechanical degrees
1 cycle (c)
Pulse Width (P): The number of electrical degrees that an
output is high during one cycle. This value is nominally
180°e or 1/ cycle.
3
= N cycles
= 360 electrical degrees (°e)
= 1 bar and window pair
Pulse Width Error (ΔP): The deviation, in electrical degrees,
of the pulse width from its ideal value of 180°e.
State Width (S): The number of electrical degrees between
a transition in the output of channel A and the neighbor-
ing transition in the output of channel B. There are 4 states
per cycle, each nominally 90°e.
State Width Error (ΔS): The deviation, in electrical degrees,
of each state width from its ideal value of 90°e.
Phase (φ): The number of electrical degrees between the
center of the high state of channel A and the center of the
high state of channel B. This value is nominally 90°e for
quadrature output.
Phase Error (Δφ): The deviation of the phase from its ideal
value of 90°e.
Direction of Rotation: When the codewheel rotates
counterclockwise, as viewed looking down on the module
(so the marking is visible), channel A will lead channel B. If
the codewheel rotates in the opposite direction, channel
B will lead channel A.
Optical Radius (Rop): The distance from the codewheel’s
center of rotation to the optical center (O.C.) of the
encoder module.
Angular Misalignment Error (E
of the sensor in relation to the tangential direction. This
applies for both rotary and linear motion.
Mounting Position (R
of rotation to center of Alignment Tab receiving hole.
M
): Distance from Motor Shaft center
A
): angular misalignment