Allegro MicroSystems Magnetic Field Sensors 271

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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)

A1128LUATS-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

MATTE TIN

e3

A1315LUA-5-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG VOLTAGE

RECTANGULAR

1.635-1.665V

PLASTIC/EPOXY

3.63 V

BICMOS

4.09 mm

1.52 inch

3 ohm

SIP3,.8,50

3.02 mm

3 V

150 Cel

-40 Cel

4.85 mV/G

SOLDER

10 mA

INVERTING

A1302ELHLX-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

DIGITAL VOLTAGE

RECTANGULAR

0.25-4.65V

PLASTIC/EPOXY

6 V

CMOS

UNIPOLAR

2.98 mm

1.91 inch

2 ohm

TO-236

1

2.5

1 mm

4.5 V

85 Cel

-40 Cel

1.3 mV/G

SOLDER

11 mA

NON-INVERTING

MAGNETIC SENSITIVITY

A1302KLHLX-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

DIGITAL VOLTAGE

RECTANGULAR

0.25-4.65V

PLASTIC/EPOXY

6 V

CMOS

UNIPOLAR

2.98 mm

1.91 inch

2 ohm

TO-236

1

2.5

1 mm

4.5 V

125 Cel

-40 Cel

1.3 mV/G

SOLDER

11 mA

NON-INVERTING

MAGNETIC SENSITIVITY

A1308KUATN-1-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG VOLTAGE

RECTANGULAR

5.5 V

BICMOS

4.09 mm

1.52 inch

3 ohm

SIP3,.03,50

4.12 mm

4.5 V

125 Cel

-40 Cel

1.3 mV/G

SOLDER

11.5 mA

IT HAS SENSITIVITY OF 1.3 MV/G

A1262LLHLT-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

VOLTAGE OUTPUT

RECTANGULAR

-4 mT

24 V

20 A

4 mT

3.4 mT

2.98 mm

1.91 inch

1 mm

4 V

150 Cel

-40 Cel

SOLDER

7.5 mA

A3295KLHLT-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-60mA

.5 mT

24 V

60 A

7.5 mT

7 mT

2.98 mm

1.91 inch

1 mm

4.2 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

8 mA

e3

APS11760LLHALT-0PL

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

DIGITAL VOLTAGE

RECTANGULAR

PLASTIC

.5 mT

24 V

AEC-Q100; ISO-26262

OMNIPOLAR

7 mT

1.75 mT

2.98 mm

1.91 inch

TO-236

1 mm

3.3 V

150 Cel

-40 Cel

SOLDER

5 mA

SHORT CIRCUIT PROTECTION

ACS70310LKTATN-010B5-C

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

4

ANALOG VOLTAGE

RECTANGULAR

0.50-4.50V

5.5 V

BICMOS

AEC-Q100

5.21 mm

1 inch

4 ohm

3.43 mm

4.5 V

150 Cel

-40 Cel

10 mV/G

PIN

3-WIRE INTERFACE

PUSH-PULL

15 mA

REVERSE BATTERY PROTECTION

PLASTIC

A1212LUA-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG VOLTAGE

RECTANGULAR

400mV

PLASTIC/EPOXY

-17.5 mT

24 V

BICMOS

UNIPOLAR

17.5 mT

22.5 mT

4.105 mm

1.52 inch

3.8/24

SIP3,.03,50

Other Sensors/Transducers

5.2 mm

3.8 V

150 Cel

-40 Cel

Matte Tin (Sn)

SOLDER

7.5 mA

NON-INVERTING

BICMOS COMPATIBLE, REVERSE BATTERY PROTECTION

e3

A1223LLHLX-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-60mA

-18 mT

24 V

60 A

18 mT

30 mT

2.98 mm

1.91 inch

1 mm

3 V

150 Cel

-40 Cel

SOLDER

4 mA

AEC-Q100; ISO 26262 COMPLIANT; SHORT-CIRCUIT PROTECTION

A1308KUATN-2-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG VOLTAGE

RECTANGULAR

5.5 V

BICMOS

4.09 mm

1.52 inch

3 ohm

SIP3,.03,50

4.12 mm

4.5 V

125 Cel

-40 Cel

2.5 mV/G

SOLDER

11.5 mA

IT HAS SENSITIVITY OF 2.5 MV/G

A1308KUATN-3-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG VOLTAGE

RECTANGULAR

5.5 V

BICMOS

4.09 mm

1.52 inch

3 ohm

SIP3,.03,50

4.12 mm

4.5 V

125 Cel

-40 Cel

3.125 mV/G

SOLDER

11.5 mA

IT HAS SENSITIVITY OF 3.125 MV/G

A1308KUATN-5-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG VOLTAGE

RECTANGULAR

5.5 V

BICMOS

4.09 mm

1.52 inch

3 ohm

SIP3,.03,50

4.12 mm

4.5 V

125 Cel

-40 Cel

5 mV/G

SOLDER

11.5 mA

IT HAS SENSITIVITY OF 5 MV/G

A1308LLHLT-5-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

A1325LLHLT-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

ANALOG VOLTAGE

RECTANGULAR

5.5 V

2.98 mm

1.91 inch

1 ohm

1 mm

4.5 V

150 Cel

-40 Cel

SOLDER

9 mA

IT HAS SENSITIVITY OF 3.125 MV/G

A1377LUCLU-TC1-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

ACS70310LKTATN-2P5B5-C

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

4

ANALOG VOLTAGE

RECTANGULAR

0.50-4.50V

5.5 V

BICMOS

AEC-Q100

5.21 mm

1 inch

4 ohm

3.43 mm

4.5 V

150 Cel

-40 Cel

2.5 mV/G

PIN

3-WIRE INTERFACE

PUSH-PULL

15 mA

REVERSE BATTERY PROTECTION

PLASTIC

ACS716KLATR-12CB-NL-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

16

ANALOG VOLTAGE

RECTANGULAR

PLASTIC/EPOXY

3.6 V

BICMOS

10.3 mm

7.5 inch

SOP16,.4

0.75

2.65 mm

3 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

11 mA

IT HAS A SENSITIVITY OF 37.1 MV/A

e3

ACS724LMATR-30AU-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

16

VOLTAGE OUTPUT

RECTANGULAR

0.5-4.5V

PLASTIC/EPOXY

5.5 V

BICMOS

AEC-Q100

10.3 mm

7.5 inch

SINGLE-ENDED

SOP16,.4

1

2.65 mm

4.5 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

14 mA

AEC-Q100; IT HAVE SENSITIVITY OF 132 MV/A

e3

A1122LUA-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

CURRENT OUTPUT

RECTANGULAR

30-60mA

PLASTIC/EPOXY

11 mT

24 V

60 A

BICMOS

AEC-Q100

UNIPOLAR

20 mT

2.5 mT

4.09 mm

1.52 inch

TRANSISTOR

SIP3,.02,50

4.12 mm

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

OPEN-DRAIN

4 mA

AEC-Q100; SHORT CIRCUIT PROTECTION

PLASTIC

e3

A1214LUA-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG VOLTAGE

RECTANGULAR

400mV

PLASTIC/EPOXY

-30 mT

24 V

BICMOS

UNIPOLAR

30 mT

44 mT

4.105 mm

1.52 inch

3.8/24

SIP3,.03,50

Other Sensors/Transducers

5.2 mm

3.8 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

7.5 mA

NON-INVERTING

BICMOS COMPATIBLE, REVERSE BATTERY PROTECTION

e3

A1250LUA-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

CURRENT OUTPUT

RECTANGULAR

30-60mA

PLASTIC/EPOXY

-2.5 mT

24 V

60 A

BICMOS

AEC-Q100; ISO-26262

BIPOLAR(LATCHED)

2.5 mT

10 mT

4.09 mm

1.52 inch

SIP3,.03,50

5.26 mm

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

OPEN-DRAIN

4 mA

NON-INVERTING

SHORT CIRCUIT PROTECTION

e3

A3423EK-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

4

ANALOG VOLTAGE

RECTANGULAR

500mV

PLASTIC/EPOXY

-5.5 mT

24 V

30 A

5.5 mT

3 mT

5.21 mm

1.55 inch

3.8/24

SINGLE-ENDED

SIP4,.04,50

Other Sensors/Transducers

3.43 mm

3.8 V

85 Cel

-40 Cel

Matte Tin (Sn)

SOLDER

SINGLE-ENDED

14 mA

SHORT CIRCUIT PROTECTION

e3

ACS724LMATR-50AU-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

16

VOLTAGE OUTPUT

RECTANGULAR

0.5-4.5V

PLASTIC/EPOXY

5.5 V

BICMOS

AEC-Q100

10.3 mm

7.5 inch

SINGLE-ENDED

SOP16,.4

1

2.65 mm

4.5 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

14 mA

AEC-Q100; IT HAVE SENSITIVITY OF 80 MV/A

e3

ALS31300EEJASR-JOY

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

APS12200LLHALX

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

CURRENT OUTPUT

RECTANGULAR

-3.5 mT

24 V

3.5 mT

4 mT

2.98 mm

1.91 inch

1 mm

2.8 V

150 Cel

-40 Cel

SOLDER

3-WIRE INTERFACE

3 mA

AEC-Q100; ISO 26262; SHORT CIRCUIT PROTECTION

A1106LLHLT-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

VOLTAGE OUTPUT

RECTANGULAR

16 mT

24 V

BICMOS

AEC-Q100

43 mT

10.5 mT

2.98 mm

1.91 inch

TO-236

.95 mm

3.8 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

7.5 mA

REVERSE BATTERY PROTECTION

A1126LUA-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

DIGITAL CURRENT

RECTANGULAR

30-60mA

PLASTIC/EPOXY

.5 mT

24 V

60 A

BICMOS

UNIPOLAR

5.5 mT

3 mT

4.09 mm

1.52 inch

3/24

SIP3,.03,50

Other Sensors/Transducers

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

OPEN-DRAIN

4 mA

INVERTING

e3

A3423LLTR-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

8

ANALOG VOLTAGE

RECTANGULAR

500mV

PLASTIC/EPOXY

-5.5 mT

24 V

30 A

5.5 mT

3 mT

4.9 mm

3.9 inch

3.8/24

SINGLE-ENDED

SOP8,.25

Other Sensors/Transducers

1.75 mm

3.8 V

150 Cel

-40 Cel

Matte Tin (Sn)

SOLDER

SINGLE-ENDED

14 mA

SHORT CIRCUIT PROTECTION

PLASTIC

e3

APS11205LLHALT

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

VOLTAGE OUTPUT

RECTANGULAR

.5 mT

5.5 V

BICMOS

AEC-Q100

UNIPOLAR

5 mT

1 mT

2.975 mm

1.91 inch

TO-236

.95 mm

2.8 V

150 Cel

-40 Cel

TIN

SOLDER

OPEN-DRAIN

4 mA

SHORT CIRCUIT PROTECTION

PLASTIC

e3

APS12205LUAA

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

TIN

e3

A1250LLHLT-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

CURRENT OUTPUT

RECTANGULAR

30-60mA

PLASTIC/EPOXY

-2.5 mT

24 V

60 A

BICMOS

AEC-Q100; ISO-26262

BIPOLAR(LATCHED)

2.5 mT

10 mT

2.98 mm

1.91 inch

TO-236

1 mm

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

OPEN-DRAIN

4 mA

NON-INVERTING

SHORT CIRCUIT PROTECTION

e3

A1250LLHLX-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

CURRENT OUTPUT

RECTANGULAR

30-60mA

PLASTIC/EPOXY

-2.5 mT

24 V

60 A

BICMOS

AEC-Q100; ISO-26262

BIPOLAR(LATCHED)

2.5 mT

10 mT

2.98 mm

1.91 inch

TO-236

1 mm

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

OPEN-DRAIN

4 mA

NON-INVERTING

SHORT CIRCUIT PROTECTION

e3

A1321LUA-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

DIGITAL VOLTAGE

RECTANGULAR

0.20-4.70V

PLASTIC/EPOXY

5.5 V

10 A

BICMOS

4.09 mm

1.52 inch

5

1.5 ohm

SIP3,.03,50

Other Sensors

1.5

3.02 mm

4.5 V

150 Cel

-40 Cel

5 mV/G

Matte Tin (Sn)

SOLDER

8 mA

RATIOMETRIC OUTPUT, RAIL-TO-RAIL OUTPUT, SENSITIVITY IS 5 MVPERGAUSS

PLASTIC

e3

ALS31313KLEATR-JOY

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

ATS128LSETN-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-90mA

24 V

90 A

7 inch

3 V

150 Cel

-40 Cel

SOLDER

5.5 mA

SHORT CIRCUIT PROTECTION, REVERSE BATTERY PROTECTION

A1220LLHLT-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-60mA

-4 mT

24 V

60 A

4 mT

4.5 mT

2.98 mm

1.91 inch

1 mm

3 V

150 Cel

-40 Cel

SOLDER

4 mA

AEC-Q100; ISO 26262 COMPLIANT; SHORT-CIRCUIT PROTECTION

A1308KUA-2-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG VOLTAGE

RECTANGULAR

5.5 V

BICMOS

4.09 mm

1.52 inch

3 ohm

SIP3,.03,50

4.12 mm

4.5 V

125 Cel

-40 Cel

2.5 mV/G

Matte Tin (Sn)

SOLDER

11.5 mA

IT HAS SENSITIVITY OF 2.5 MILLIVOLT PER GAUSS

e3

A1220ELHLT-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-60mA

-4 mT

24 V

60 A

4 mT

4.5 mT

2.98 mm

1.91 inch

1 mm

3 V

85 Cel

-40 Cel

SOLDER

4 mA

AEC-Q100; ISO 26262 COMPLIANT; SHORT-CIRCUIT PROTECTION

A1104LLHLT-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

VOLTAGE OUTPUT

RECTANGULAR

2.5 mT

24 V

BICMOS

AEC-Q100

45 mT

5.5 mT

2.98 mm

1.91 inch

TO-236

.95 mm

3.8 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

7.5 mA

REVERSE BATTERY PROTECTION

A1106EUA-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

VOLTAGE OUTPUT

RECTANGULAR

16 mT

24 V

BICMOS

AEC-Q100

43 mT

10.5 mT

4.09 mm

1.52 inch

SIP3,.8,50

3.02 mm

3.8 V

85 Cel

-40 Cel

MATTE TIN

SOLDER

7.5 mA

REVERSE BATTERY PROTECTION

A1106LUA-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

VOLTAGE OUTPUT

RECTANGULAR

16 mT

24 V

BICMOS

AEC-Q100

43 mT

10.5 mT

4.09 mm

1.52 inch

SIP3,.8,50

3.02 mm

3.8 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

7.5 mA

REVERSE BATTERY PROTECTION

A1125LUA-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

CURRENT OUTPUT

RECTANGULAR

30-60mA

PLASTIC/EPOXY

.5 mT

24 V

60 A

BICMOS

AEC-Q100

UNIPOLAR

5 mT

1 mT

4.09 mm

1.52 inch

TRANSISTOR

SIP3,.02,50

4.12 mm

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

OPEN-DRAIN

4 mA

AEC-Q100; SHORT CIRCUIT PROTECTION

PLASTIC

e3

A1122ELHLT-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

CURRENT OUTPUT

RECTANGULAR

30-60mA

PLASTIC/EPOXY

11 mT

24 V

60 A

BICMOS

AEC-Q100

UNIPOLAR

20 mT

2.5 mT

2.98 mm

1.91 inch

TRANSISTOR

TO-236

1 mm

3 V

85 Cel

-40 Cel

MATTE TIN

SOLDER

OPEN-DRAIN

4 mA

AEC-Q100; SHORT CIRCUIT PROTECTION

PLASTIC

e3

A1308LLHLX-2-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

ANALOG VOLTAGE

RECTANGULAR

5.5 V

BICMOS

2.98 mm

1.91 inch

3 ohm

TO-236

1 mm

4.5 V

150 Cel

-40 Cel

2.5 mV/G

SOLDER

11.5 mA

IT HAS SENSITIVITY OF 2.5 MILLIVOLT PER GAUSS

A3211ELHLT-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

DIGITAL CURRENT

RECTANGULAR

1 mT

3.5 V

CMOS

AEC-Q100

5.5 mT

.59 mT

2.975 mm

1.91 inch

TO-236

.95 mm

2.5 V

85 Cel

-40 Cel

MATTE TIN

SOLDER

2 mA

INVERTING

A1389LLHLT-9-T

Allegro MicroSystems

MAGNETIC FIELD SENSOR,HALL EFFECT

MATTE TIN

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.