3

Absolute Maximum Ratings

Storage Temperature, T

Operating Temperature, T

Supply Voltage, V

Output Voltage, V

Output Current per Channel, I

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.

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

tance from the codewheel’s center

of rotation to the optical center

(O.C.) of the encoder module.

Recommended Operating Conditions

Parameter

Symbol

Min.

Typ.

Max.

Units

Notes

Temperature

T

-40

125

°C

Supply Voltage

V

CC

4.5

5.5

Volts

Ripple < 100 mV

p-p

Load Capacitance

C

L

100

pF

3.3 k

Ω pull-up resistor

Count Frequency

f

100

kHz

Velocity (rpm) x N

60

Note: The module performance is guaranteed to 100 kHz but can operate at higher frequencies.

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

215

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").