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AA and AB-Series Analog Sensors

NVE’s AA and AB-Series analog GMR and TMR sensors have high sensitivity, excellent temperature stability, low power consumption, and small size. Their unmatched versatility make them an excellent choice for a wide range of analog sensing applications from rugged industrial and automotive position, speed, and current sensors to low voltage, battery-powered sensors for handheld instrumentation, and implantable medical devices.

AA-Series sensors use NVE's patented spintronic materials to provide a directionally-sensitive output. These sensors are sensitive in one direction in the plane of the IC. These devices provide omnipolar output, that is the same output for magnetic fields in the positive or negative direction along the axis of sensitivity. All sensors use a temperature compensating Wheatstone bridge configuration. Five AA-Series families are available: the standard AA-Series; the AAH-Series; AAL-Series; the AAT-Series, and the AAV-Series. Their key characteristics are summarized in the following table:

AA-Series
AAH-Series
AAL-Series
AAT-Series
AAV-Series
Field Sensitivity 
High
Very High
High
Very, Very High
High
Operating Field Range
High
Low
Medium
Low
Low
Hysteresis 
Medium
High
Low
Very Low
Very Low
Max. Temperature 
High
Very High
Very High
High
Medium

AB-Series sensors are differential devices, or gradiometers. Two families of AB sensors are offered: the standard AB-Series and the high-sensitivity ABH-Series. They have operational characteristics similar to the AA and AAH sensors described above, but with the bipolar linear output characteristics of a differential sensor.

AAV-Series sensors are used as current sensors because of their very low hysteresis. AAT-Series sensors are run in saturation as angle sensors because of their very low hysteresis and high sensitivity.

NVE Technical Video AA-Series GMR Analog
Sensor Demonstration
NVE Technical Video Sensing Current Through
a Circuit Board Trace
NVE Technical Video High-Sensitivity
Magnetic Sensor Demo


Our analog sensors include magnetometers, gradiometers, angle sensors, and current sensors:

Magnetometers
 Part Number 
Linear Range
(|Oe|)
 Saturation 
(|Oe|)
Sensitivity
(mV/V/Oe)
Max.
 Non-Linearity 
(% Uni.)
Maximum
 Hysteresis 
(% Uni.)
Max.
 Op. Temp. 
(C)
Typical
 Resistance 
 Package 
Min.
Max.
Min.
Max.
1.5
10.5
15
3.0
4.2
2
4
125
5 kΩ
SOIC8
2.0
14
20
2
3.2
2
4
125
5 kΩ
SOIC8
5.0
35
50
0.9
1.3
2
4
125
5 kΩ
MSOP8
5.0
35
50
0.9
1.3
2
4
125
5 kΩ
SOIC8
10.0
70
100
0.45
0.65
2
4
125
5 kΩ
SOIC8
5.0
35
50
0.9
1.3
2
4
125
30 kΩ
MSOP8
5.0
35
50
0.9
1.3
2
4
125
30 kΩ
SOIC8
0.6
3.0
6
11
18
4
15
150
2 kΩ
SOIC8
1.5
7.5
15
3.2
4.8
4
15
150
2 kΩ
MSOP8
1.5
10.5
15
3.0
4.2
2
2
150
5.5 kΩ
SOIC8
1.5
10.5
15
3.0
4.2
2
2
125
2.2 kΩ
TDFN6

Gradiometers
Part
Number
Linear Range (|Oe|)  Saturation 
(|Oe|)
 Element 
Spacing
(mm)
 Max. Non- 
Linearity
(% Uni.)
Maximum
 Hysteresis 
(% Uni.)
 Max. Op. 
Temp.
(C)
Typical
 Resistance 
 Package 
Min.
Max.
20
200
250
0.5
2
4
125
2.5 kΩ
SOIC8
20
200
250
0.5
2
4
125
2.5 kΩ
MSOP8
5
40
70
0.5
4
15
150
1.2 kΩ
MSOP8

Angle Sensors
Part
Number
 Typ. p-p 
Signal
(mV/V)
 Min. Applied 
Field (Oe)
Max. Angular
Measurement
 Error (const. field) 
 Max. Op. 
Temp.
(C)
Typical
Device
  Resistance 
 Package 
200
30
0.5
125
1.25 MΩ
TDFN6
200
30
0.5
125
40 kΩ
TDFN6
200
15
0.5
125
1.25 MΩ
TDFN6
200
30
0.5
125
6 MΩ
TDFN6

Current Sensors
Part
Number
Current
Measurement Range (mA)
Sensitivity
 (mV/V/mA) 
 Max. Non- 
Linearity
 Max. Op. 
Temp.
(C)
Typical
 Resistance 
 Package 
Min.
Max.
-80
80
0.08
1%
85
7 kΩ
TDFN6

Sensor Reference Designs

Sensor output vs. magnet distance calculator

 Analog sensor datasheets

 AAV-Series current sensor data sheet

 AAT-Series angle sensor data sheet

Short-Form Sensor Catalog Short-Form
Sensor Catalog

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