AAH002-02 - NVE Corporation - Datasheet.Directory

AA and AB-Series Analog Sensors

- 12 -

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AA and AB-Series Analog Sensors

NVE’s AA and AB-Series analog GMR sensors offer unique and unparalleled magnetic sensing

capabilities. These sensors are characterized by high sensitivity to applied magnetic fields, excellent

temperature stability, low power consumption, and small size. These characteristics make them

suitable for use in a wide variety of applications from rugged industrial and automotive position,

speed, and current sensors, to low-voltage, battery-powered sensors for use in hand-held

instrumentation and implantable medical devices. The unmatched versatility of these basic magnetic

sensors makes them an excellent choice for a wide range of analog sensing applications.

The AA-Series sensors use NVE’s patented GMR materials and on-chip flux concentrators to provide

a directionally sensitive output signal. These sensors are sensitive in one direction in the plane of the

IC, with a cosine-scaled falloff in sen sitivity as the sensor is rotated away from the sensitive direction.

Also, these devices provide the same output for magnetic fields in the positive or negative direction

along the axis of sensitivity (omnipolar output). All sensors are designed in a Wheatstone bridge

configuration to provide temperature compensation. Two packages are offered, an SOIC8 and an

MSOP8. These sensors are also availa ble in die form on a special-order basis.

There are three families of NVE’s basic AA-Series sensors: the standard AA-Series, the AAH-Series,

and the AAL-Series. Each of these sensor families uses a different GMR material, with its own

characteristics. The comparison table below summarizes the different characteristics of the GMR

materials:

Parameter AA Series AAH Series AAL Series

Sensitivity to Applied Fields High Very High High

Field Range of Operation High Low Medium

Hysteresis Medium High Low

Temperature Range High Very High Very High

The AB-Series sensors are differential sensor devices, or gradiometers, which take advantage of the

high output characteristics of NVE’s GMR materials. Two families of AB sensors are offered, the

standard AB-Series and the ABH-Series. They have operational characteristics similar to the AA and

AAH sensors described in the table above but with the bipolar linear output characteristics of a

differential sensor.

Within these different sensor families, customers can find an excellent match to their analog sensor

requirements.

AA and AB-Series Analog Sensors

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Quick Reference: AA and AB-Series

For comparison and product selection purposes, the following table lists all available AA and AB-

Series an alog sensors, with some of their key characteristics:

Magnetometers:

Part

Number

Linear

Range

(|Oe1|) Sensitivity

(mV/V-Oe1)

Maximum

Non-

linearity

(% Uni.2)

Maximum

Hyster-

esis

(% Uni.2)

Maximum

Operating

Temp

(°C)

Typical

Resis-

tance

(Ohms) Package

Min Max Min Max

AA002-02 1.5 10.5 3.0 4.2 2 4 125 5K SOIC8

AA003-02 2.0 14 2 3.2 2 4 125 5K SOIC8

AA004-00 5.0 35 0.9 1.3 2 4 125 5K MSOP8

AA004-02 5.0 35 0.9 1.3 2 4 125 5K SOIC8

AA005-02 10.0 70 0.45 0.65 2 4 125 5K SOIC8

AA006-00 5.0 35 0.9 1.3 2 4 125 30K MSOP8

AA006-02 5.0 35 0.9 1.3 2 4 125 30K SOIC8

AAH002-02 0.6 3.0 11.0 18.0 6 15 150 2K SOIC8

AAH004-00 1.5 7.5 3.2 4.8 4 15 150 2K MSOP8

AAL002-02 1.5 10.5 3.0 4.2 2 2 150 5.5K SOIC8

Gradiometers:

Part

Number

Linear

Range

(|Oe1|)

Resistor

Spacing

(mm)

Maximum

Non-

linearity

(% Uni.2)

Maximum

Hyster-

esis

(% Uni.2)

Maximum

Operating

Temp

(°C)

Typical

Resis-

tance

(Ohms) Package

Min Max

AB001-02 20 200 0.5 2 4 125 2.5K SOIC8

AB001-00 20 200 0.5 2 4 125 2.5K MSOP8

ABH001-00 5 40 0.5 4 15 150 1.2K MSOP8

Notes:

1. Oersted (Oe) = 1 Gauss in air.

2. Unipolar operation means exposure to magnetic fields of one polarity, for example 0 to +30 Gauss, or -2 to -50 Gauss.

Bipolar operation (for example, -5 to +10 Gauss) will increase nonlinearity and hysteresis

AA Sensors

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AA Sensors

Features:

• Excellent Sensitivity to Applied Magnetic Fields

• Wheat stone Bridge A nalo g O utp ut

• Operating Temperature to 125°C Continuous

• Wide Linear Range of Operation

• Near-Zero Voltage Operation

• DC to >1MHz Frequency Response

• Small, Low-Profile Surface Mount Packages

Applications:

• General Motion, Speed, and Position Sensing

• Low Power, Low Voltage Applications

• Low Field Sensing for Magnetic Media Detection

• C ur rent Sensing

Description:

The basic AA-Series GMR sensors are general-p urpo se magnetometers for use in a wide variet y of

applications. They exh ibit excellent linearity, a large output signal with applied magnetic field s , stable

and linear temperature characteristics, and a purely ratiometric output.

Magnetic Characteristics :

Part

Number Saturation

Field (Oe1)

Linear

Range

(|Oe1|) Sensitivity

(mV/V-Oe1) Resistance

(Ohms) Package2 Die Size3

(µm)

Min Max Min Max

AA002-02 15 1.5 10.5 3.0 4.2 5K ±20% SOIC8 436x3370

AA003-02 20 2.0 14 2 3.2 5K ±20% SOIC8 436x3370

AA004-00 50 5 35 0.9 1.3 5K ±20% MSOP8 411x1458

AA004-02 50 5 35 0.9 1.3 5K ±20% SOIC8 411x1458

AA005-02 100 10 70 0.45 0.65 5K ±20% SOIC8 411x1458

AA006-00 50 5 35 0.9 1.3 30K ±20% MSOP8 836x1986

AA006-02 50 5 35 0.9 1.3 30K ±20% SOIC8 836x1986

GMR pin 5, OUT+

Functi onal Block Diagram

shield

pin 1, OUT-

pin 4, V-

(ground)

pin 8,

V+(supply)

Orientation

chamfer OUT - V- (ground)

OUT+V+ (supply)

Pin-out

NVE

AAxxx

-02

Axis of Sensitivity

NVE

AAXXX-02

Pin 1

AA Sensors

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General Characteristics:

Parameter Min Typical Max Unit

Input Voltage Range <14 244 Volts

Operating Frequency DC >1 MHz

Operating Temperature Range -50 125 °C

Bridge Electrical Offset -4 +4 mV/V

Signal Output at Max. Field 60 mV/V

Nonlinearity 2 % (unipolar)5

Hysteresis 4 % (unipolar)5

TCR +0.14

% / °C6

TCOI +0.03

% / °C6

TCOV -0.1

% / °C6

Off Axis Characteristic Cos β7

ESD Tolerance 400 V pin-to-pin HBM

Notes:

1. 1 Oersted (Oe) = 1 Gauss in air.

2. See the Appendix for package dimensions and tolerances.

3. Sensors can be provided in die form by special request.

4. GMR AA-Series sensors are pure ratiometric devices meaning that they will operate properly at extremely low supply

voltages. The output signal will be proportional to the supply voltage. Maximum voltage range is limited by the power

dissipation in the package and the maximum operating temperature of the sensor.

5. Unipolar operation means exposure to magnetic fields of one polarity, e.g., 0 to 30 Gauss, or 2 to -50 Gauss, but not -20 to

+30 Gauss (bipolar operation). Bipolar operation will increase nonlinearity and hysteresis.

6. TCR is resistance change with temperature with no applied field. TCOI is the output cha n ge with tempe rat ure using a

constant current source to power the sensor. TCOV is the output change with temperature using a constant voltage source

to power the sensor. See the graphs below.

7. Beta (β) is any angle deviation from the sensitive axis.

AA002 Te mper ature Performa nce,

1mA Curr e n t S u p p ly

-0.05

0.05

0.1

0.15

0.2

0.25

0.3

0.35

-20-15-10-5 0 5 101520

Applied Magnetic Field (Oe)

Output Voltage (V)

-40C

25C

85C

125C

AA 0 02 Te mp er at u re Pe rf o rm anc e, 5V Sup p l y

-0.05

0.05

0.1

0.15

0.2

0.25

0.3

0.35

-20 -15 -10 -5 0 5 10 15 20

Applied Magnetic Field (Oe)

Output Voltage (V)

-40C

25C

85C

125C

AAH Sensors

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AAH Sensors

Features:

• Extremely High Sensitivity to Applied Magnetic Fields

• Wheat stone Bridge A nalo g O utp ut

• Temperature Tolerance to 150°C Continuous

• Near-Zero Voltage Operation

• DC to >1MHz Frequency Response

• Small, Low-Profile Surface Mount Packages

Applications:

• Lo w Vol t a ge , Hi g h Te mpe rat ure Applicati ons

• Low Field Sensing for Magnetic Media Detection

• Earth’s Magnetic Field Detection

• C ur rent Sensing

Description:

The AAH-Series GMR sensors are manufactured with a high sensitivity GMR material, making them

ideally suited for any low magnetic field application. They are also extremely temperature tolerant, to

+150°C operating temperatures.

Magnetic Characteristics :

Part

Number Saturation

Field (Oe1)

Linear

Range

(|Oe1|) Sensitivity

(mV/V-Oe1) Resistance

(Ohms) Package2 Die Size3

(µm)

Min Max Min Max

AAH002-02 6 0.6 3.0 11.0 18.0 2K ±20% SOIC8 436x3370

AAH004-00 15 1.5 7.5 3.2 4.8 2K ±20% MSOP 411x1458

GMR pin 5, OUT+

Functi onal Block Diagram

shield

pin 1, OUT-

pin 4, V-

(ground)

pin 8,

V+(supply)

Orientation

chamfer OUT - V- (ground)

OUT+V+ (supply)

Pin-out

NVE

AAxxx

-02

Axis of Sensitivity

NVE

AAXXX-02

Pin 1

AAH Sensors

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General Characteristics:

Parameter Min Typical Max Unit

Input Voltage Range <14 ±124 Volts

Operating Frequency DC >1 MHz

Operating Temperature Range -50 150 °C

Bridge Electrical Offset -5 +5 mV/V

Signal Output at Max. Field 40 mV/V

Nonlinearity 4 % (unipolar)5

Hysteresis 15 % (unipolar)5

TCR +0.11

% / °C6

TCOI +0.10

% / °C6

TCOV 0.0

% / °C6

Off Axis Characteristic Cos β7

ESD Tolerance 400 V pin-to-pin HBM

Notes:

1. 1 Oersted (Oe) = 1 Gauss in air.

2. See the Appendix for package dimensions and tolerances.

3. Sensors can be provided in die form by special request.

4. GMR AAH-Series sensors are pure ratiometric devices meaning that they will operate properly at extremely low supply

voltages. The output signal will be proportional to the supply voltage. Maximum voltage range is limited by the power

dissipation in the package and the maximum operating temperature of the sensor.

5. Unipolar operation means exposure to magnetic fields of one polarity, e.g. 0 to 30 Gauss, or -2 to -50 Gauss, but not -20 to

+30 Gauss (bipolar operation). Bipolar operation will increase nonlinearity and hysteresis.

6. TCR is resistance change with temperature with no applied field. TCOI is the output cha n ge with tempe rat ure using a

constant current source to power the sensor. TCOV is the output change with temperature using a constant voltage source

to power the sensor.

7. Beta (β) is any angle deviation from the sensitive axis.

AAH002 Temperature Performance,

2.28 mA Current Source

-0.05

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

-20-15-10-5 0 5101520

A pplied Magnetic Field (Oe)

Out pu t Voltage (V)

-40C

25C

85C

125C

AAH002 Temperature Performance, 5V Supply

-0.05

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

-20 -15 -10 -5 0 5 10 15 20

Applied Magnetic Field (O e)

Volta ge Output (V )

-40C

25C

85C

125C

AAL Sensors

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AAL Sensors

Features:

• Excellent Sensitivity to Applied Magnetic Fields

• Wheat stone Bridge A nalo g O utp ut

• Temperature Tolerance to 150°C Continuous

• Very Low Magnetic Hysteresis

• Near-Zero Voltage Operation

• DC to >1MHz Frequency Response

• Small, Low-Profile Surface Mount Packages

Applications:

• General Motion, Speed, and Position Sensing

• Lo w Vol t a ge , Hi g h Te mpe rat ure Applicati ons

• Low Field Sensing for Magnetic Media Detection

• C ur rent Sensing

Description:

The AAL-Series GMR sensors are manufactured with a low hysteresis GMR material, for use in

magnetometer applications where minimum hysteresis is important. They are also extremely

temperature tolerant, to +150°C operating temperatures.

Magnetic Characteristics :

Part

Number Saturation

Field (Oe1)

Linear

Range

(|Oe1|) Sensitivity

(mV/V-Oe1) Resistance

(Ohms) Package2 Die Size3

(µm)

Min Max Min Max

AAL002-02 15 1.5 10.5 3.0 4.2 5.5K ±20% SOIC8 436x3370

GMR pin 5, OUT+

Functi onal Block Diagram

shield

pin 1, OUT-

pin 4, V-

(ground)

pin 8,

V+(supply)

Orientation

chamfer OUT - V- (ground)

OUT+V+ (supply)

Pin-out

NVE

AAxxx

-02

Axis of Sensitivity

NVE

AAXXX-02

Pin 1

AAL Sensors

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General Characteristics:

Parameter Min Typical Max Unit

Input Voltage Range <14 ±254 Volts

Operating Frequency DC >1 MHz

Operating Temperature Range -50 150 °C

Bridge Electrical Offset -4 +4 mV/V

Signal Output at Max. Field 45 mV/V

Nonlinearity 2 % (unipolar)5

Hysteresis 4 % (unipolar)5

TCR +0.11

% / °C6

TCOI -0.28

% / °C6

TCOV -0.40

% / °C6

Off Axis Characteristic Cos β7

ESD Tolerance 400 V pin-to-pin HBM

Notes:

1. 1 Oersted (Oe) = 1 Gauss in air.

2. See the Appendix for package dimensions and tolerances.

3. Sensors can be provided in die form by special request.

4. GMR AAL-Series sensors are pure ratiometric devices meani n g that they will operate properly at extremely low supply

voltages. The output signal will be proportional to the supply voltage. Maximum voltage range is limited by the power

dissipation in the package and the maximum operating temperature of the sensor.

5. Unipolar operation means exposure to magnetic fields of one polarity, e.g. 0 to 30 Gauss, or -2 to -50 Gauss, but not -20 to

+30 Gauss (bipolar operation). Bipolar operation will increase nonlinearity and hysteresis.

6. TCR is resistance change with temperature with no applied field. TCOI is the output cha n ge with tempe rat ure using a

constant current source to power the sensor. TCOV is the output change with temperature using a constant voltage source

to power the sensor.

7. Beta (β) is any deviation angle from the sensitive axis.

AAL002 Temperat ure Performance,

1mA Current Supply

-0.05

0.05

0.1

0.15

0.2

0.25

0.3

0.35

-30 -20 -10 0 10 20 30

Applied Magnetic Field (Oe)

Output Voltage (V)

-40C

25C

85C

125C

AAL002 Temperature Performance, 5V S upply

-0.05

0.05

0.1

0.15

0.2

0.25

0.3

0.35

-30 -20 -100102030

Applied Mag netic Fie ld (O e )

Output Voltage (V)

-40C

25C

85C

125C

AAV Sensors

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AAV Sensors

Features:

• Operates in Magnetic Saturation, 30 to 200 Gauss

• Half-Bridge or Individual Resistor Configurations

• Sine and Cosine Outputs Available

• Utilizes Spin Valve GMR Material

• Precise Detection of Magnetic Field

• Ultra-Small PLLP Package

• Cannot Be Damaged by Large External Magnetic Fields

Description:

The AAV001-11 and AAV002-11 are arrays of four GMR resistors rotated at 90-degree intervals in

the package. The AAV001-11 features independent resistors that can be wired together to form two

half-bridges, or used as independent resistors. The AAV002-11 has the bridge connections made

internally to the package. For either part, the output can be configured to represent the sine and cosine

function of the magnetic field being applied to the sensor. Each resistor is 1.5 kΩ nominal resistance

and output of each half-bridge is ratiometric with the power supply voltage. The part features NVE’s

PLLP6 housing, which is a 3.0 mm x 3.0 mm x 0.9 mm thick surface mount package.

Operation:

The sensor elements contain two magnetic layers: a pinned, or fixed-direction layer, and a movable or

free layer. The diagram below illustrates the configuration with arrows representing the two layers:

Pinned Layer

Free Layer

Angle Between Pinned

and Free Layers

Determines Electrical

Resistance of Sensor

Applied Magnetic Field

(30 to 200 Gauss)

Free Layer Aligns

with the Applied

Magnetic Field

AAV Sensors

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The end user must apply a saturating magnetic field (30 to 200 Oersteds) in the plane of the sensor in

order for the sensor to operate. The movable layer will align with the applied magnetic field. As the

applied field changes direction the angle between the movable layer and the pinned layer changes,

resulting in a change of resistance in the device. A grap h of the device resistance vs. the an gle between

the pinned layer and the movable layer is shown below:

Four individual sensor resistors are supplied in the package, each with the pinned layer rotated 90º with

respect to that of the previous sensor. These resistors can be connected in two half-bridge

configurations to provide a sine and cosine output or monitored individually to provide an absolute

indication of the angle between the pinned layer and the movable layer.

Resistance Change of Spin V alve

Sensor Element

1420

1430

1440

1450

1460

1470

1480

1490

1500

1510

1520

090180270360

Angle Between Pinned and Movabl e Layers

Resistance (Ohms)

AAV Sensors

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A drawing showing the ICs position in the package is given below. On each IC there is an arrow

indicating the direction of the pinned layer.

Functional Block Diagram, Marking, and Pinout, AAV001-11:

BBP

R3 (Cosine)

R1 (Sine)

R2 (Sine)

R4 (Cosine)

VCC

GND

Sine Output

Cosine Output

AAV Sensors

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Functional Block Diagram, Marking, and Pinout, AAV002-11:

Specifications:

Parameter Test

Condition Min Typ Max Units

Nominal Resistance of Each Resistor 25°C 1200 1500 1800 Ohms

Maximum Resistance Decrease with Field

Change Operating at

25°C 4.5% 5.2% 7%

Required Strength of Applied Magnetic Field Operating 30 200 Oersted2

Measurement Error Operating 2 Degrees

Supply Voltage Operating 12 Volts

Offset Voltage Operating at

25°C -10 10 mV/V

Temperature Range of Operation Operating -40 150 °C

Storage Temperature -40 170 °C

Temperature Coefficient of Re sistance Operating +0.3

%/°C

TCOV3 Operating -0.24 %/°C

TCOI3 Operating -0.16

%/°C

Notes:

1. Large Magnetic Fields WILL NOT cause damage to NVE GMR Sensors.

2. 1 Oe (Oersted) = 1 Gauss in air = 0.1 mTesla = 79.8 Amps/meter.

3. TCOV is the percent change in o utput signal over temperature with a constant volta ge s ource po wering the part and TCOI

is the percent change in output ov er temperature with a constant current source.

BBQ

R3 (Cosine)

R4 (Cosine)

R2 (Sine )

R1 (Sine )

VCC

Cos

GND

Sin

Cosin e Ou tpu t S ine Output

AB Sensors

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AB Sensors

Features:

• Excellent Sensitivity to Applied Magnetic Fields

• Wheatstone Bri dge A nalo g O ut put

• Temperature Toler ance to 125°C Continuous

• Wide Linear Range of Operation

• Near-Zero Voltage Operation

• DC to >1MHz Frequency Response

• Small, Low-Profile Surface Mount Packages

Applications:

• General Differential Field Sensing

• Gear Tooth and Encoder Speed and Position Sensing

• Low Power, Low Vo ltage Applications

Description:

The AB-Series GMR se nsors are general- pu r po se gradiometers for use i n a wide va ri et y of

applications. Two pairs of unshielded GMR sensor elements provide for directional sensing of small

gradients in large and small magnetic fields. The ability to detect only magnetic gradients allows low

sensitivity to external sources of uniform magnetic field allowing these sensors to work successfully in

high magnetic noise environments such as near electric motors or current carrying wires.

V- (ground)

OUT B

Pin 1 OUT A

V+ (supply)Pinout

NVE

ABxxx-02

Axis of Sensitivity

GMR

pin 5, OUT B

Functional Block diagram

pin 1, OUT A

pin 4, V-

(ground)

pin 8, V+(supply)

Magnetic Characteristics :

Part

Number Saturation

Field (Oe1)

Linear

Range

(|Oe1|)

Resistor

Sensitivity

(%R / Oe1) Resistance

(Ohms) Package2 Die Size3

(µm)

Min Max Min Max

AB001-02 250 10 175 0.02 0.03 2.5K ±20% SOIC8 651x1231

AB001-00 250 10 175 0.02 0.03 2.5K ±20% MSOP8 651x1231

AB Sensors

- 25 -

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General Characteristics:

Parameter Min Typical Max Unit

Input Voltage Range <14 ±12.54 Volts

Operating Frequency DC >1 MHz

Operating Temperature Range -50 125 °C

Bridge Electrical Offset -4 +4 mV/V

Signal Output at Max. Field 120 mV/V

Nonlinearity 2 % (unipolar)5

Hysteresis 4 % (unipolar)5

TCR +0.14

% / °C6

TCOI +0.03

% / °C6

TCOV -0.1

% / °C6

Off Axis Characteristic Cos β7

ESD Tolerance 400 V pin-to-pin HBM

Notes:

1. 1 Oersted (Oe) = 1 Gauss in air.

2. See the Appendix for package dimensions and tolerances.

3. Sensors can be provided in die form by special request.

4. GMR AB-Series sensors are pure ratiometric devices, meaning that they will operate properly at extremely low supply

voltages. The output signal will be proportional to the supply voltage. Maximum voltage range is limited by the power

dissipation in the package and the maximum operating temperature of the sensor.

5. Unipolar operation means exposure to magnetic fields of one polarity, e.g., 0 to 30 Gauss, or -2 to -50 Gauss, but not -20

to +30 Gauss (bipolar operation). Bipolar operation will increase nonlinearity and hysteresis.

6. TCR is resistance change with temperature with no applied field. TCOI is the output cha n ge with tempe rat ure using a

constant current source to power the sensor. TCOV is the output change with temperature using a constant voltage source

to power the sensor.

7. Beta (β) is any angle deviation from the sensitive axis.

The Figure at left is a

simulated output from an

NVE Gradiomet er. The

output / gradient

correlation shown

assumes one pair of

resistors is held at zero

field. Note the bipolar

output.

Typical Gradi ometer Transfer Function

-50

-40

-30

-20

-10

-400 -200 0 200 400

Magnetic Field Applied to Resistors

Differential Voltage Out of Sensor (mV)

Increasing field

on X resistors

Increasing field

on Y resistors

ABH Sensors

- 26 -

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ABH Sensors

Features:

• Extremely High Sensitivity to Applied Magnetic Fields

• Wheatstone Bri dge A nalo g O ut put

• Temperature Toler ance to 150°C Continuous

• Wide Linear Range of Operation

• Near-Zero Voltage Operation

• DC to >1MHz Frequency Response

• Small, Low-Profile Surface Mount Packages

Applications:

• General Differential Field Sensing

• Gear Tooth and Encoder Speed and Position Sensing

• Low Voltage, Hi g h Temperature Appli cat i ons

Description:

The ABH-Series GMR sensors are low field, high temperature gradiometers for use in a wide variety

of applications. Two pairs of unshielded GMR sensor elements provide for directional sensing of small

gradients in large and small magnetic fields. The ability to detect only magnetic gradients allows low

sensitivity to external sources of uniform magnetic field allowing these sensors to work successfully in

high magnetic noise environments such as near electric motors or current carrying wires.

V- (ground)

OUT B

Pin 1 OUT A

V+ (supply)Pinout

NVE

ABxxx-02

Axis of Sensitivity

GMR

pin 5, OUT B

Functional Block diagram

pin 1, OUT A

pin 4, V-

(ground)

pin 8, V+(supply)

Magnetic Characteristics :

Part

Number Saturation

Field (Oe1)

Linear

Range

(|Oe1|)

Resistor

Sensitivity

(%R / Oe1) Resistance

(Ohms) Package2 Die Size3

(µm)

Min Max Min Max

ABH001-00 70 5 40 0.06 0.12 1.2K ±20% MSOP8 651x1231

ABH Sensors

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General Characteristics:

Parameter Min Typical Max Unit

Input Voltage Range <14 ±64 Volts

Operating Frequency DC >1 MHz

Operating Temperature Range -50 150 °C

Bridge Electrical Offset -4 +4 mV/V

Signal Output at Max. Field 80 mV/V

Nonlinearity 4 % (unipolar)5

Hysteresis 15 % (unipolar)5

TCR +0.11

% / °C6

TCOI +0.10

% / °C6

TCOV 0.0

% / °C6

Off Axis Characteristic Cos β7

ESD Tolerance 400 V pin-to-pin HBM

Notes:

1. 1 Oersted (Oe) = 1 Gauss in air.

2. See the Appendix for package dimensions and tolerances.

3. Sensors can be provided in die form by special request.

4. GMR AB-Series sensors are pure ratiometric devices meaning that they will operate properly at extremely low supply

voltages. The output signal will be proportional to the supply voltage. Maximum voltage range is limited by the power

dissipation in the package and the maximum operating temperature of the sensor.

5. Unipolar operation means exposure to magnetic fields of one polarity, e.g., 0 to 30 Gauss, or -2 to -50 Gauss, but not -20 to

+30 Gauss (bipolar operation). Bipolar operation will increase nonlinearity and hysteresis.

6. TCR is resistance change with temperature with no applied field. TCOI is the output cha n ge with te mpe rat ure, using a

constant current source to run the sensor. TCOV is the output change with temperature, using a constant voltage source to

run the sensor.

7. Beta (β) is any angle deviation from the sensitive axis.

The Figure at left is a

simulated output from an

NVE Gradiomet er. The

output / gradient

correlation shown

assumes one pair of

resistors is held at zero

field. Note the bipolar

output.

Typical Gradiometer Transfer Functi on

-50

-40

-30

-20

-10

-400 -200 0 200 400

Magnetic Field Applied to Resistors

Differential Voltage Out of Sensor (mV)

Increasing field

on X resistors

Increasing field

on Y resistors