7

Encoding Characteristics

Encoding Characteristics over Recommended Operating Range and Recommended Mounting Tolerances

unless otherwise specified. Values are for the worst error in the full rotation.

Part Number

Description

Symbol

Min.

Typ.*

Max.

Units

HEDS-6500*** Pulse Width Error

∆P

535

e

Logic State Width Error

∆S

535

e

Phase Error

∆Φ

215

e

Position Error

∆Θ

7

20

min. of arc

Cycle Error

∆C

5

5.5

e

HEDS-6540**

Pulse Width Error

∆P

535

e

Logic State Width Error

∆S

535

e

Phase Error

∆Φ

215

e

Position Error

∆Θ

7

20

min. of arc

Cycle Error

∆C

5

5.5

e

Index Pulse Width

∆P0

55

90

125

e

CH I fall after CH B or CH A fall

-25

°C to +100°C

t1

10

100

250

ns

-40

°C to +100°C

t1

-300

100

250

ns

CH I rise after CH B or CH A rise

-25

°C to +100°C

t2

70

150

300

ns

-40

°C to +100°C

t2

70

150

1000

ns

HEDL-654x

Pulse Width Error

∆P

535

e

Logic State Width Error

∆S

535

e

Phase Error

∆Φ

215

e

Position Error

∆Θ

7

20

min. of arc

Cycle Error

∆C

5

5.5

e

Index Pulse Width

∆P0

90

e

*Typical values specified at Vcc = 5.0 V and 25°C.

**HEDS-6540 – Active high Index part. Pull-up of 2.7 k

Ω used on all outputs of modules that do not have a line driver.

***HEDS-6500 – 3.3 k

Ω pull-up resistors used on all encoder module outputs.