ASIL-Compliant Hall-Effect Wheel Speed Sensor IC

with Speed and Direction Output

A19300

5

Allegro MicroSystems

955 Perimeter Road

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

www.allegromicro.com

Characteristic

Symbol

Test Conditions

Min.

Typ.[1]

Max.

Unit

ELECTRICAL CHARACTERISTICS

Supply Voltage [2]

VCC

Potential between pin 1 and pin 2

4

–

24

V

Undervoltage Lockout

VCC(UV)

VCC 0 V → 5 V or 5 V → 0 V

–

3.6

3.95

V

Reverse Supply Current [3]

IRCC

VCC = VRCC(max)

–10

–

–

mA

Supply Zener Clamp Voltage

VZsupply

ICC = 11.4 mA, TA = 25°C, potential between

pin 1 and pin 2

28

–

–

V

Supply Current

ICC(LOW)

Low-current state

5.9

7

8.4

mA

ICC(HIGH)

High-current state

12

14

16

mA

Supply Current Ratio [4]

ICC(HIGH) /

ICC(LOW)

Measured as ratio of high current to low current

(isothermal)

1.9

–

–

–

ASIL Safety Current

IRESET

Refer to Figure 10

1.5

3.5

3.9

mA

ASIL Safety Current Time

tRESET

Refer to Figure 10

5

–

–

ms

Output Rise/Fall Time

tr, tf

Voltage measured at terminal 2 in Figure 1,

RL = 100 Ω, CL = 10 pF, measured between

10% and 90% of ICC(LOW) and ICC(HIGH) [5]

0

–

1.5

μs

POWER-ON CHARACTERISTICS

Power-On State

POS

VCC > VCC(min), as connected in Figure 1

ICC(LOW)

mA

Power-On Time [6]

tPO

VCC > VCC(min), as connected in Figure 1

–

0.25

1

ms

OUTPUT PULSE CHARACTERISTICS, PULSE PROTOCOL [6]

Pulse Width Off Time

tW(PRE)

Refer to Figure 8

38

45

52

μs

Forward Pulse Width

tW(FWD)

-xNxx variant

38

45

52

μs

-xWxx variant

76

90

104

μs

Reverse Pulse Width

tW(REV)

-xNxx and -xWxx variant

153

180

207

μs

Warning Pulse Width

tW(WARN)

-xxPx variant

38

45

52

μs

Standstill Pulse Width

tW(STILL)

-xxPx variant

1232

1440

1656

μs

Standstill Period

tSTOP

-xxPx variant

590

737

848

ms

OPERATING CHARACTERISTICS: Valid throughout full operating and temperature ranges, unless otherwise specified

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