-2-

REV. PrA

NOTES

1 Left: wheel moving from pin 1 to pin 5 with the front of the AD22157 facing the wheel (see figure 7).

2 Timing wheel with 2.5mm tooth/2.5mm valley and 5mmx4mm SmCo magnet.

Parameters

Min

Typ

Max

Units

OPERATING TEMPERATURE

-40

150

C

POWER SUPPLY

Vcc Operating

Vcc max transient

Reverse Supply

4.5

20.0

27.0

-30.0

V

SUPPLY CURRENT

Iout low

Iout high (pulsed)

5.5

11.0

7.0

14.0

8.5

17.0

mA

OUTPUT CURENT RATIO

1.8

2

2.2

Nominal field operation (left/right)

Low field operation (left/right)

Air gap limit

No field or stopped for >737mS

72/144

288/576

36

1152

90/180

360/720

45

1440

108/216

432/664

54

1728

uS

PULSE PERIOD IN STOPPED MODE

589

737

884

mS

THRESHOLDS FOR OPERATION MODES

Nominal field threshold

Low field threshold

Field too low threshold

4<Bth

2<Bth<4

Bth<2

mT

POWER ON TIME

4

mS

CALIBRATION CYCLE

4

edges

CALIBRATION UPDATE CYCLE

each edge

2%

ABSOLUTE MAXIMUM RATINGS*

Maximum Supply Voltage . . . . . . . . . . . . . . . . . . . . . +27 V

Maximum Output Current (Pin 2) . . . . . . . . . . . . . . 18 mA

Operating Temperature Range . . . . . . . . . –40

°C to +150°C

Die Junction Temperature . . . . . . . . . . . . . . . . . . . .+190

°C

Storage Temperature Range . . . . . . . . . . –65

°C to +160°C

Lead Temperature (Soldering, 10 sec) . . . . . . . . . . +300

°C

*Stresses above those listed under “Absolute Maximum Ratings” may cause permanent

damage to the device. This is a stress rating only and functional operation of the device

at these or any other conditions above those listed in the operational sections of this spec-

ification is not implied. Exposure to absolute maximum rating conditions for extended

periods may affect device reliability.

PIN 1 IDENTIFIER

1

2

3

4

5

Pin Configuration

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection. Although the

AD22157 features proprietary ESD protection circuitry, permanent damage may occur on devices

subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended

to avoid performance degradation or loss of functionality.

NC

NC

NC

Vlow

Vhigh

PRELIMINARY TECHNICAL DATA