HEDS-9740 datasheet(4/7 Pages) HP

Part #	HEDS-9740

Description	Agilent HEDS-974x Series for 180, 300, 360 LPI Small Optical Encoder Modules

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Electrical Characteristics over Recommended Operating Range, Typical at T A = 25˚C

Parameter

Symbol

Min.

Typ.

Max.

Units

Notes

Supply Current

I CC

12

21

40

mA

High Level Output Voltage

VOH

2.4

V

IOH = –200 µA

Low Level Output Voltage

VOL

0.4

V

IOL = 3.2 mA

Rise Time

tr

70

ns

CL = 25 pF

Fall Time

tf

45

ns

RL = (NO pullup)

Recommended Operating Conditions

Parameter

Symbol

Min.

Typ.

Max.

Units

Notes

Temperature

T

–40

85

°C

Supply Voltage

VCC

4.5

5.0

5.5

V

Ripple < 100 mVp-p. Recommended

one bypass capacitor (1

µF)

between VCC and GND less than

15 cm from the encoder.

Load Capacitance

CL

100

pF

Pullup Resistor

RL

none

Recommended no pullup. Device

has integrated 2.5 k

Ω on outputs.

Count Frequency

40

kHz

(Velocity (rpm) x N) / 60

Angular Misalignment EA

–2.0

0

+2.0

deg.

Mounting considerations.

Encoding Characteristics

Encoding Characteristics over Recommended Operating Range and Recommended Mounting Tolerances.

These characteristics do not include codewheel/codestrip contribution. The Typical Values are averages over the full

rotation of the codewheel.

Parameter

Symbol

Typical

Maximum

Units

Pulse Width Error

∆P5

40

°e

Logic State Width Error

∆S3

40

°e

Phase Error

∆φ

215

°e

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HEDS-9740 Datasheet(PDF) 4 Page - Agilent(Hewlett-Packard)

HEDS-9740 Datasheet(HTML) 4 Page - Agilent(Hewlett-Packard)

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