Dual Output Narrow Pitch

Differential Speed and Direction Sensor IC

A17502

5

Allegro MicroSystems

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Characteristic

Symbol

Test Conditions

Min.

Typ. [4]

Max.

Unit

ELECTRICAL SUPPLY CHARACTERISTICS

Supply Voltage [5]

VCC

Voltage across VCC and GND

4

–

24

V

Undervoltage Lockout

VCC(UV)

–

–

3.99

V

Supply Current

ICC

–

10

15

mA

Reverse Supply Current

IRCC

VCC = –18 V

–10

–

–

mA

ELECTRICAL PROTECTION CHARACTERISTICS

Supply Clamp Voltage

VCSUPPLY TA = 25°C; ICC = 18 mA

28

–

–

V

Reverse Supply Clamp Voltage

VRCSUPPLY TA = 25°C; ICC = –3 mA

–

–

–18

V

Output Clamp Voltage

VCOUT

TA = 25°C; IOUT = 3 mA

28

–

–

V

Output Current Internal Limiter

IOUT(LIM)

Current limited by design for short-circuit event

on OUTA and OUTB independently;

low-impedance output state

30

55

85

mA

POWER-ON CHARACTERISTICS

Power-On State

POS

For OUTA and OUTB

VOUT(HIGH)

V

Power-On Time

tPO

Time from when VCC > VCC(min), to when sensor

IC output is valid

–

–

1

ms

CALIBRATION CHARACTERISTICS

First Output Edge

–

Amount of target rotation with constant direction

following tPO until first electrical output transition;

-xD algorithm selection; see Figure 1

–

1

2

TCYCLE

Initial Calibration

–

Amount of target rotation with constant direction

following tPO until first valid speed and direction

output; -xD algorithm selection; see Figure 1

–

2

4

TCYCLE

OUTPUT CHARACTERISTICS [6]

Output Low Voltage

VOUT(LOW)

Fault-detection mode disabled; IOUT = 10 mA

–

0.165

0.35

V

Fault-detection

mode enabled

5 V, 1 kΩ or 5 V, 3 kΩ option

0.5

–

1.25

V

12 V, 1 kΩ option

1.2

–

3.6

V

Output High Voltage

VOUT(HIGH)

Fault-detection mode disabled

–

VPULLUP

–

V

Fault-detection

mode enabled

5 V, 1 kΩ or 5 V, 3 kΩ option

3.75

–

4.5

V

12 V, 1 kΩ option

8.4

–

10.8

V

OPERATING CHARACTERISTICS: Valid throughout operating ranges, unless otherwise specified

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[4]

Typical values are for VCC = 5 V and TA = 25°C, unless otherwise specified.

[5]

Maximum voltage must be adjusted for power dissipation and junction temperature; see representative for Power Derating discussions.

[6]

Output characteristics are valid for each output independently, unless otherwise specified.