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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. Six AA-Series families are available: the standard AA-Series; the AAH-Series; AAL-Series; the AAK; the AAT-Series, and the AAV-Series. Their key characteristics are summarized in the following table:

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

Video AA-Series GMR Analog
Sensor Demonstration
Video Sensing Current Through
a Circuit Board Trace
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|)
Typical
Sensitivity
(mV/V/Oe)
Max.
 Non-Linearity 
(% Uni.)
Maximum
 Hysteresis 
(% Uni.)
Max.
 Op. Temp. 
(C)
Typical
 Resistance 
 Package 
Min.
Max.
1.5
10.5
15
3.6
2
4
125
5 kΩ
SOIC8
2.0
14
20
2.6
2
4
125
5 kΩ
SOIC8
5.0
35
50
1
2
4
125
5 kΩ
MSOP8
5.0
35
50
1
2
4
125
5 kΩ
SOIC8
10.0
70
100
0.5
2
4
125
5 kΩ
SOIC8
5.0
35
50
1
2
4
125
30 kΩ
MSOP8
5.0
35
50
1
2
4
125
30 kΩ
SOIC8
50
450
500
0.1
2
4
125
5 kΩ
MSOP8
0.6
3.0
6
15
4
15
150
2 kΩ
SOIC8
1.5
7.5
15
4
4
15
150
2 kΩ
MSOP8
1.5
10.5
15
3.5
2
2
150
5.5 kΩ
SOIC8
1.5
10.5
15
3.5
2
2
125
2.2 kΩ
TDFN6
AAL024-10
1.5
10.5
15
3.5
2
2
125
2.2 kΩ
TDFN6
(Cross-axis sensitivity)
400
2500
4000
0.0033
2
4
85
3.5 kΩ
ULLGA4

Click on a magnetometer part type for more information:
 
Magnetometer Sensors


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
 Config- 
 uration  
 Required 
Field
 Max. Op. 
Temp-
erature
Typical
Device
 Resistance 
 Package 
 200 mV/V 
 Half bridge 
30 Oe
125C
1.25 MΩ
TDFN6
200 mV/V
Half bridge
30 Oe
125C
40 kΩ
TDFN6
200 mV/V
Half bridge
15 Oe
125C
1.25 MΩ
TDFN6
200 mV/V
Half bridge
30 Oe
125C
6 MΩ
TDFN6
400 mV/V
Full bridge
30 Oe
125C
625 kΩ
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

 AAT001/AAT009 angle sensor data sheet

Short-Form Sensor Catalog Short-Form
Sensor Catalog

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