Magnetic Field Sensors

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Part RoHS Manufacturer Sensors or Transducers Type Mounting Feature No. of Terminals Output Type Package Shape or Style Output Range Package Body Material Minimum Range Of Magnetic Field Maximum Supply Voltage Maximum Output Current Technology Screening Level Input Mode Maximum Magnetic Field Range Hysteresis Body Length/Diameter Body Width Power Supplies (V) Output Circuit Type Resistance Package Equivalence Code No. of Axes Sub-Category Linearity (%) Body Height Minimum Supply Voltage Maximum Operating Temperature Response Time Minimum Operating Temperature Sensitivity (mV/G) Terminal Finish Termination Type Output Interface Type Output (V) Maximum Operating Current Output Polarity Additional Features Maximum Measurement Range (mm) Housing JESD-609 Code Operating Frequency Minimum Measurement Range (mm)

KMZ41,118

NXP Semiconductors

MAGNETIC FIELD SENSOR,MAGNETORESISTIVE

SURFACE MOUNT

8

ANALOG VOLTAGE

RECTANGULAR

70-86mV

PLASTIC/EPOXY

50 mT

9 V

4.9 mm

3.9 inch

5

SOP8,.25

2

Other Sensors

1.75 mm

5 V

150 Cel

-40 Cel

2.8 mV/G

NICKEL PALLADIUM GOLD

SOLDER

BRIDGE

PLASTIC

e4

KMZ10C,112

NXP Semiconductors

MAGNETIC FIELD SENSOR,MAGNETORESISTIVE

THROUGH HOLE MOUNT

DIGITAL VOLTAGE

RECTANGULAR

-9.37 mT

9.37 mT

.5 mT

4.6 mm

1.7 inch

1800 ohm

5.1 mm

SOLDER

PLASTIC

KMA199E,115

NXP Semiconductors

MAGNETIC FIELD SENSOR,MAGNETORESISTIVE

THROUGH HOLE MOUNT

ANALOG VOLTAGE

RECTANGULAR

-0.3-6V

PLASTIC/EPOXY

5.5 V

2 A

HYBRID

43.75 mT

6.37 mm

1.55 inch

5

5000 ohm

SOT-880

1

Other Sensors

4.5 V

160 Cel

-40 Cel

Tin (Sn)

SOLDER

1-WIRE INTERFACE

BRIDGE

10 mA

RADIOMETRIC OUTPUT

PLASTIC

e3

PDRV5013ADQLPG

Texas Instruments

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

DIGITAL VOLTAGE

RECTANGULAR

0-38V

-5 mT

38 V

5 mT

5.4 mT

4 mm

1.52 inch

5.05 mm

2.5 V

125 Cel

-40 Cel

SOLDER

3.5 mA

SHORT CIRCUIT PROTECTION

PDRV5013AGQDBZT

Texas Instruments

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

DIGITAL VOLTAGE

RECTANGULAR

0-38V

-9 mT

38 V

9 mT

12 mT

2.92 mm

1.3 inch

1.005 mm

2.5 V

125 Cel

-40 Cel

SOLDER

3.5 mA

SHORT CIRCUIT PROTECTION

PLASTIC

PDRV5013AGQLPG

Texas Instruments

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

DIGITAL VOLTAGE

RECTANGULAR

0-38V

-9 mT

38 V

9 mT

12 mT

4 mm

1.52 inch

5.05 mm

2.5 V

125 Cel

-40 Cel

SOLDER

3.5 mA

SHORT CIRCUIT PROTECTION

PDRV5013BCQLPG

Texas Instruments

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

DIGITAL VOLTAGE

RECTANGULAR

0-38V

-18 mT

38 V

18 mT

24 mT

4 mm

1.52 inch

5.05 mm

2.5 V

125 Cel

-40 Cel

SOLDER

3.5 mA

SHORT CIRCUIT PROTECTION

DRV5013ADEDBZR

Texas Instruments

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

DIGITAL VOLTAGE

RECTANGULAR

0-38V

-4 mT

38 V

4 mT

5 mT

2.92 mm

1.3 inch

1.005 mm

2.5 V

125 Cel

-40 Cel

NICKEL PALLADIUM GOLD SILVER

SOLDER

3.5 mA

SHORT CIRCUIT PROTECTION

PLASTIC

e4

A1688LUBTN-L-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

DIGITAL OUTPUT

RECTANGULAR

24 V

4 mm

1.5 inch

4.55 mm

4 V

150 Cel

-40 Cel

SOLDER

2-WIRE INTERFACE

16 mA

AH180-PL-A-S

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

ANALOG VOLTAGE

RECTANGULAR

0.30V

2 mT

5.5 V

6 mT

1.5 mT

4.1 mm

1.5 inch

3 mm

2.5 V

85 Cel

-40 Cel

MATTE TIN

SOLDER

9 mA

BATTERY OPERATION

e3

AH180-PL-B-S

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

ANALOG VOLTAGE

RECTANGULAR

0.30V

2 mT

5.5 V

6 mT

1.5 mT

4.1 mm

1.5 inch

3 mm

2.5 V

85 Cel

-40 Cel

MATTE TIN

SOLDER

9 mA

BATTERY OPERATION

e3

A3422EKA-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

5

ANALOG VOLTAGE

RECTANGULAR

0.50V

PLASTIC/EPOXY

-7.5 mT

18 V

30 A

BICMOS

8.5 mT

4.6 mT

6.33 mm

1.55 inch

4.5/18

SIP5,.028,50

Other Sensors

4.53 mm

4.5 V

85 Cel

-40 Cel

Matte Tin (Sn)

SOLDER

OPEN-COLLECTOR

18 mA

INVERTING

e3

AH1888-ZG-7

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

6

ANALOG VOLTAGE

RECTANGULAR

0.2-1.6V

PLASTIC/EPOXY

3.5 mT

3.3 V

BIPOLAR

7.9 mT

.8 mT

1.6 mm

1.175 inch

1.8/3

FL6,.047,20

Other Sensors

.585 mm

1.65 V

85 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

COMPLEMENTARY

BATTERY OPERATION

e3

A1381EUA-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG VOLTAGE

RECTANGULAR

4.35-4.65V

PLASTIC/EPOXY

5.5 V

2 A

BICMOS

4.09 mm

1.52 inch

5

SINGLE-ENDED

1 ohm

SIP3,.03,50

Other Sensors/Transducers

1.5

3.02 mm

4.5 V

85 Cel

-40 Cel

Matte Tin (Sn)

SOLDER

8 mA

SENSITIVITY IS 9 MV/G

e3

A1381LLHLT-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

ANALOG VOLTAGE

RECTANGULAR

4.35-4.65V

PLASTIC/EPOXY

5.5 V

2 A

BICMOS

2.98 mm

1.91 inch

5

SINGLE-ENDED

1 ohm

TO-236

Other Sensors/Transducers

1.5

1 mm

4.5 V

150 Cel

-40 Cel

Matte Tin (Sn)

SOLDER

8 mA

SENSITIVITY IS 9 MV/G

e3

A1383ELHLT-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

ANALOG VOLTAGE

RECTANGULAR

4.35-4.65V

PLASTIC/EPOXY

5.5 V

2 A

BICMOS

2.98 mm

1.91 inch

5

SINGLE-ENDED

1 ohm

TO-236

Other Sensors/Transducers

1.5

1 mm

4.5 V

85 Cel

-40 Cel

Matte Tin (Sn)

SOLDER

8 mA

SENSITIVITY IS 4.25 MV/G

e3

AH1822-FU4G-7

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

6

ANALOG VOLTAGE

RECTANGULAR

0.30V

PLASTIC/EPOXY

1 mT

5.5 V

BIPOLAR(LATCHED)

5.5 mT

.8 mT

3.01 mm

2.01 inch

3/5

SOLCC6,.12,20

Other Sensors

.4 mm

2.5 V

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

SOLDER

OPEN-DRAIN

10 mA

NON-INVERTING

BATTERY OPERATION

e4

HAL401SF-K

Micronas Semiconductor Holding Ag

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

ANALOG VOLTAGE

RECTANGULAR

2.10-2.30V

-50 mT

1 A

50 mT

4.55 mm

2.55 inch

30 ohm

2

1.15 mm

Matte Tin (Sn)

SOLDER

17.1 mA

REVERSE VOLTAGE PROTECTION

PLASTIC

e3

A1318LUA-2-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

ANALOG VOLTAGE

RECTANGULAR

3.63 V

4.09 mm

1.52 inch

1 ohm

4.12 mm

3 V

150 Cel

-40 Cel

SOLDER

10 mA

IT HAS A SENSITIVITY OF 2.5 MV/G

TLE4946H

Infineon Technologies

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

DIGITAL CURRENT

RECTANGULAR

0-20mA

-17 mT

18 V

20 A

BIPOLAR

17 mT

28 mT

3 mm

1.6 inch

TRANSISTOR

TSOP3,.11,37

1.1 mm

2.7 V

150 Cel

-40 Cel

SOLDER

OPEN-COLLECTOR

6 mA

REVERSE BATTERY PROTECTION

PLASTIC

A1323EUA

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG VOLTAGE

RECTANGULAR

0.20-4.70V

PLASTIC/EPOXY

-1.5 A

BICMOS

10 mT

4.1 mm

1.55 inch

5

1.5 ohm

SIP3,.03,50

Other Sensors

1.50

3.03 mm

85 Cel

-40 Cel

2.5 mV/G

SOLDER

8 mA

RATIOMETRIC OUTPUT, RAIL-TO-RAIL OUTPUT

PLASTIC

DRV401AMDWPREP

Texas Instruments

MAGNETIC FIELD SENSOR,MAGNETORESISTIVE

SURFACE MOUNT

20

DIGITAL VOLTAGE

RECTANGULAR

0.20-4.60V

PLASTIC/EPOXY

5.5 V

CMOS

12.825 mm

7.52 inch

5

DIFFERENTIAL

SOP20,.4

Other Sensors/Transducers

2.65 mm

4.5 V

125 Cel

-55 Cel

NICKEL PALLADIUM GOLD

SOLDER

DIFFERENTIAL

6.8 mA

PLASTIC

e4

ZMT32TA

Diodes Incorporated

MAGNETIC FIELD SENSOR,MAGNETORESISTIVE

SURFACE MOUNT

8

ANALOG VOLTAGE

RECTANGULAR

40-60mV

PLASTIC/EPOXY

8.5 V

6.5 mm

3.5 inch

5

SOP8,.28,60

2

Other Sensors

1.7 mm

160 Cel

-40 Cel

MATTE TIN

SOLDER

BRIDGE

8.5 mA

e3

103SR19A-1

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

PANEL MOUNT

ANALOG CURRENT

CYLINDRICAL

20mA

-12 mT

25 V

20 A

12 mT

25.4 mm

-.5 V

100 Cel

-40 Cel

3-WIRE INTERFACE

10 mA

634SS2

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,MAGNETORESISTIVE

THROUGH HOLE MOUNT

ANALOG CURRENT

SQUARE

10mA

20 A

6.096 mm

6.096 inch

2.286 mm

100 Cel

-40 Cel

SOLDER

3-WIRE INTERFACE

5 mA

SS494B-S

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG CURRENT

CYLINDRICAL

PLASTIC/EPOXY

-42 mT

10.5 V

1.5 A

42 mT

4.064 mm

1.57 inch

5

SINGLE-ENDED

SMSIP3H,.21,50

Other Sensors

-1.5

2.99 mm

4.5 V

150 Cel

-40 Cel

5.4 mV/G

SOLDER

3-WIRE INTERFACE

SINGLE-ENDED

8.7 mA

SS494B-T2

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG CURRENT

RECTANGULAR

PLASTIC/EPOXY

-42 mT

10.5 V

42 mT

4.06 mm

1.57 inch

5

TRANSISTOR

SIP3,.1,50

Other Sensors

-1.5

3 mm

4.5 V

150 Cel

-40 Cel

5 mV/G

PIN

OPEN-COLLECTOR

8.7 mA

SS494B-T3

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG CURRENT

RECTANGULAR

PLASTIC/EPOXY

-42 mT

10.5 V

42 mT

4.06 mm

1.57 inch

5

TRANSISTOR

SIP3,.1,50

Other Sensors

-1.5

3 mm

4.5 V

150 Cel

-40 Cel

5 mV/G

PIN

OPEN-COLLECTOR

8.7 mA

HMC1051ZL

Honeywell

MAGNETIC FIELD SENSOR,MAGNETORESISTIVE

SURFACE MOUNT

ANALOG VOLTAGE

RECTANGULAR

-.6 mT

20 V

-.6 mT

6.52 mm

1.72 inch

1000 ohm

1.80

2.03 mm

1.8 V

125 Cel

-40 Cel

1 mV/G

Tin/Lead (Sn/Pb)

SOLDER

10 mA

RESOLUTION 120 MICRO GAUSS

e0

SS495A-T3

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG CURRENT

RECTANGULAR

-67 mT

10.5 V

67 mT

4.06 mm

1.57 inch

TRANSISTOR

SIP3,.1,50

1.5

3 mm

4.5 V

150 Cel

-40 Cel

3.125 mV/G

PIN

OPEN-COLLECTOR

8.7 mA

SS495A1-T3

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG CURRENT

RECTANGULAR

-67 mT

10.5 V

67 mT

4.06 mm

1.57 inch

TRANSISTOR

SIP3,.1,50

1.5

3 mm

4.5 V

150 Cel

-40 Cel

3.125 mV/G

PIN

OPEN-COLLECTOR

8.7 mA

SS495A2-SP

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

ANALOG CURRENT

RECTANGULAR

-67 mT

10.5 V

67 mT

4.06 mm

3 inch

TRANSISTOR

SMSIP3,.25,50

1.5

1.57 mm

4.5 V

150 Cel

-40 Cel

3.125 mV/G

SOLDER

OPEN-COLLECTOR

8.7 mA

SS411A-R

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

DIGITAL CURRENT

RECTANGULAR

PLASTIC/EPOXY

-6 mT

30 V

20 A

BIPOLAR

BIPOLAR

6 mT

4.06 mm

1.57 inch

3.8/30

SIP3,.03,50

Other Sensors

3 mm

3.8 V

150 Cel

-40 Cel

SOLDER

OPEN-COLLECTOR

10 mA

INVERTING

PLASTIC

SS441A-T3

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

DIGITAL CURRENT

RECTANGULAR

PLASTIC/EPOXY

2 mT

30 V

20 A

BIPOLAR

UNIPOLAR

11.5 mT

4.06 mm

1.57 inch

3.8/30

SMSIP3H,.21,50

Other Sensors

3 mm

3.8 V

150 Cel

-40 Cel

SOLDER

OPEN-COLLECTOR

10 mA

INVERTING

PLASTIC

SS461A-T2

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

DIGITAL CURRENT

RECTANGULAR

PLASTIC/EPOXY

5 mT

30 V

20 A

BIPOLAR

BIPOLAR(LATCHED)

8.5 mT

4.06 mm

1.57 inch

3.8/30

SIP3,.03,50

Other Sensors

3 mm

3.8 V

150 Cel

-40 Cel

Tin/Silver/Copper (Sn/Ag/Cu)

SOLDER

OPEN-COLLECTOR

10 mA

INVERTING

PLASTIC

e1

SS461A-T3

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

DIGITAL CURRENT

RECTANGULAR

PLASTIC/EPOXY

5 mT

30 V

20 A

BIPOLAR

BIPOLAR(LATCHED)

8.5 mT

4.06 mm

1.57 inch

3.8/30

SIP3,.03,50

Other Sensors

3 mm

3.8 V

150 Cel

-40 Cel

Tin/Silver/Copper (Sn/Ag/Cu)

SOLDER

OPEN-COLLECTOR

10 mA

INVERTING

PLASTIC

e1

SS49E-L

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

ANALOG CURRENT

RECTANGULAR

1-1.75V

-65 mT

6.5 V

1.5 A

4.1 mm

1.6 inch

-0.70

4.1 mm

2.7 V

100 Cel

-40 Cel

1.4 mV/G

SOLDER

10 mA

OUTPUT VOLTAGE 1 TO 1.75 MILLI VOLT PER GAUSSS

PLASTIC

SS49E-T2

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

ANALOG CURRENT

RECTANGULAR

1-1.75V

-65 mT

6.5 V

1.5 A

4.1 mm

1.6 inch

-0.70

4.1 mm

2.7 V

100 Cel

-40 Cel

1.4 mV/G

SOLDER

10 mA

OUTPUT VOLTAGE 1 TO 1.75 MILLI VOLT PER GAUSSS

PLASTIC

A3212EELLT-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

DIGITAL CURRENT

SQUARE

1 mT

3.5 V

CMOS

AEC-Q100

5.5 mT

.59 mT

2 mm

2 inch

.5 mm

2.5 V

85 Cel

-40 Cel

MATTE TIN

SOLDER

2 mA

2SS52M-T3

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,MAGNETORESISTIVE

THROUGH HOLE MOUNT

3

ANALOG CURRENT

RECTANGULAR

20mA

PLASTIC/EPOXY

.4 mT

20 A

2.5 mT

4.5 mm

1.6 inch

3.8/30

SINGLE-ENDED

SIP3,.03,50

Other Sensors

4.5 mm

150 Cel

-40 Cel

SOLDER

SINGLE-ENDED

11 mA

PLASTIC

103SR12A-4

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

ANALOG VOLTAGE

CYLINDRICAL

14.50

12 mT

24 V

20 A

49.5 mT

4 mT

25.4 mm

6 V

100 Cel

-40 Cel

WIRE

10 mA

517SS16

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

ANALOG VOLTAGE

RECTANGULAR

-14 mT

16 V

40 A

14 mT

2.3 mT

10.16 mm

3.683 inch

5.08 mm

6 V

150 Cel

-40 Cel

SOLDER

10 mA

55SS16

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

ANALOG VOLTAGE

RECTANGULAR

0.40V

14.8 mT

5.25 V

20 A

24.5 mT

9.7 mT

10.16 mm

3.683 inch

5.08 mm

4.75 V

100 Cel

-40 Cel

SOLDER

4 mA

SR4P3-A1

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

ANALOG VOLTAGE

CYLINDRICAL

0.40V

.5 mT

24 V

20 A

2.5 mT

.2 mT

12.44 mm

25.4 mm

6 V

85 Cel

-40 Cel

WIRE

11 mA

SS491B

Honeywell Sensing And Control

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

ANALOG VOLTAGE

RECTANGULAR

0.40-9.80V

-5 mT

10.5 V

1.5 A

6 mT

4.06 mm

1.57 inch

-1

2.99 mm

4.5 V

85 Cel

-40 Cel

SOLDER

30 mA

SENSITIVITY 50 MILLI VOLT PER GAUSS

AH180-WG-7-P

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

ANALOG VOLTAGE

RECTANGULAR

0.30V

-3 mT

5.5 V

6 mT

1.5 mT

3 mm

1.6 inch

1.15 mm

2.5 V

85 Cel

-40 Cel

Matte Tin (Sn)

SOLDER

9 mA

e3

A3230LLHLT-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-60mA

-2.5 mT

24 V

60 A

2.5 mT

1.5 mT

2.92 mm

1.975 inch

1.17 mm

3.6 V

150 Cel

-40 Cel

Matte Tin (Sn)

SOLDER

3.5 mA

SHORT CIRCUIT PROTECTION, REVERSE BATTERY PROTECTION

e3

AD22151YRZ

Analog Devices

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

8

ANALOG VOLTAGE

RECTANGULAR

0.45-5.40V

PLASTIC/EPOXY

-60 mT

BIPOLAR

60 mT

4.9 mm

3.9 inch

5

SINGLE-ENDED

SOP8,.25

Other Sensors

0.10

1.37 mm

150 Cel

-40 Cel

.4 mV/G

MATTE TIN

SOLDER

SINGLE-ENDED

10 mA

PLASTIC

e3

Magnetic Field Sensors

Magnetic field sensors are electronic devices that measure the strength and direction of magnetic fields and convert them into a measurable electrical signal. They are commonly used in a variety of applications, such as navigation, automotive, industrial, and medical.

Magnetic field sensors work by detecting the change in magnetic field strength or direction as a magnetic field interacts with a sensing element. The sensing element is typically a small piece of magnetic material, such as a magnetoresistive or Hall-effect sensor, which generates a measurable electrical signal proportional to the strength and direction of the magnetic field.

There are several types of magnetic field sensors, including Hall-effect sensors, magnetoresistive sensors, and fluxgate sensors. Hall-effect sensors work by measuring the change in voltage across a thin strip of semiconductor material as it is exposed to a magnetic field. Magnetoresistive sensors work by measuring the change in resistance of a thin film of magnetic material as it is exposed to a magnetic field. Fluxgate sensors work by using a coil to detect the magnetic field and a feedback circuit to measure the strength and direction of the field.