AD22157 Ver la hoja de datos (PDF) - Analog Devices

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AD22157

Wheel Speed Sensor For ABS Systems

Analog Devices 

Preliminary AD22157 - Specifications (TA=+25C and V+=12V unless otherwise noted)

Parameters

Min

Typ

Max

Units

OPERATING TEMPERATURE

-40

150

C

POWER SUPPLY

Vcc Operating

Vcc max transient

Reverse Supply

4.5

20.0

V

27.0

-30.0

SUPPLY CURRENT

Iout low

Iout high (pulsed)

5.5

7.0

8.5

mA

11.0

14.0

17.0

OUTPUT CURENT RATIO

1.8

2

2.2

OUTPUT CURRENT PULSE WIDTH1

Nominal field operation (left/right)

Low field operation (left/right)

Air gap limit

No field or stopped for >737mS

E PULSE PERIOD IN STOPPED MODE

THRESHOLDS FOR OPERATION MODES

T Nominal field threshold

Low field threshold

Field too low threshold

E POWER ON TIME

CALIBRATION CYCLE

CALIBRATION UPDATE CYCLE

L TIMING ACCURACY2

72/144

288/576

36

1152

589

90/180

360/720

45

1440

737

4<Bth

2<Bth<4

Bth<2

4

4

each edge

2

O 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.

108/216

432/664

54

1728

884

uS

mS

mT

mS

edges

%

BS ABSOLUTE MAXIMUM RATINGS*

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

Pin Configuration

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

Operating Temperature Range . . . . . . . . . –40°C to +150°C

5

NC

O Die Junction Temperature . . . . . . . . . . . . . . . . . . . .+190°C

4

NC

Storage Temperature Range . . . . . . . . . . –65°C to +160°C

3

Vlow

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

2

Vhigh

*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.

1

PIN 1 IDENTIFIER

NC

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.

-2-

REV. PrA

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