HEDT-9000 Datasheet, PDF (3/7 Pages) Agilent(Hewlett-Packard) – High Temperature 125 Degree Celcious Two Channel Optical Incremental Encoder Modules

3
Pulse Width (P): The number of
electrical degrees that an output
is high during 1 cycle. This value
is nominally 180°e or 1/2 cycle.
Pulse Width Error (∆P): 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 neighboring transition
in the output of channel B. There
are 4 states per cycle, each
nominally 90°e.
State Width Error (∆S): The
deviation, in electrical degrees, of
each state width from its ideal
value of 90°e.
Absolute Maximum Ratings
Storage Temperature, T_S ..................................................................... -40°C to 125°C
Operating Temperature, T_A ................................................................ -40°C to 125°C
Supply Voltage, V_CC ...................................................................................... - 0.5 V to 7 V
Output Voltage, V_O ........................................................................................ -0.5 V to V_CC
Output Current per Channel, I_out ................................................. -1.0 mA to 5 mA
Phase (φ): The number of elec-
trical 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 (∆φ): The deviation
of the phase from its ideal value
of 90°e.
Direction of Rotation: When the
codewheel rotates in the direction
of the arrow on top of the
module, channel A will lead
channel B. If the codewheel
rotates in the opposite direction,
channel B will lead channel A.
Optical Radius (R_op): The dis-
tance from the codewheel’s center
of rotation to the optical center
(O.C.) of the encoder module.
Recommended Operating Conditions
Parameter
Temperature
Symbol
T
Min.
-40
Typ.
Supply Voltage
Load Capacitance
Count Frequency
V_CC
4.5
C_L
f
Max.
125
5.5
100
100
Units
°C
Volts
pF
kHz
Note: The module performance is guaranteed to 100 kHz but can operate at higher frequencies.
Notes
Ripple < 100 mV_p-p
3.3 kΩ pull-up resistor
Velocity (rpm) x N
60
Encoding Characteristics
Encoding Characteristics over Recommended Operating Range and Recommended Mounting Tolerances.
These Characteristics do not include codewheel/codestrip contributions.
Description
Sym. Typ. Case 1 Max. Case 2 Max. Units Notes
Pulse Width Error
∆P
7
35
45
°e
Logic State Width Error
∆S
5
35
45
°e
Phase Error
∆φ
2
15
20
°e
Case 1: Module mounted on tolerance circle of ± 0.13 mm (± 0.005 in.).
Case 2: HEDT-9000 mounted on tolerances of ± 0.50 mm (0.020").
HEDT-9100 mounted ontolerances of ± 0.38 mm (0.015").