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Analog Sensors

NVE 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.

All sensors use a temperature compensating Wheatstone bridge configuration. Five analog product families are available: the low tempco AA-Series; the high-sensitivity AAH-Series; the low-hysteresis AAL-Series; high-output ALT-Series, and AAT-Series angle sensors. Their key characteristics are summarized in the following table:

Analog Sensors
Parameter
AA/AB-Series
Magnetometers/Gradiometers
AAH-Series Magnetometers
AAL-Series Magnetometers
 ALT-Series Magnetometers
AAT-Series Angle Sensors
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
Temperature Coefficient Very, Very Low Low Low Low Low
Max. Temperature 
High
Very High
Very High
 High
High


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.



Video AA-Series GMR Analog Sensor Demonstration


Video Ultralow Temperature Coefficient


Video Sensing Current Through a Circuit Board Trace


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

Magnetometers
 Part Number 
Linear Range
(|mT|)
  Saturation 
(|mT|)
Typical
Sensitivity
(mV/V/mT)
 Max.
 Non-Linearity 
(% Uni.)		 Maximum
 Hysteresis 
(% Uni.)		 Max.
 Op. Temp. 
(°C)		 Typical
Bridge
 Resistance 		  Package 
Min.
Max.
0.15
1.05
1.5
36
2
4
125
5 kΩ
SOIC8
0.2
1.4
2
26
2
4
125
5 kΩ
SOIC8
0.05
3.5
5
10
2
4
125
5 kΩ
MSOP8
0.5
3.5
5
10
2
4
125
5 kΩ
SOIC8
1
7
10
5
2
4
125
5 kΩ
SOIC8
0.5
3.5
5
10
2
4
125
30 kΩ
MSOP8
0.5
3.5
5
10
2
4
125
30 kΩ
SOIC8
5
45
50
1
2
4
125
5 kΩ
MSOP8
0.06
0.3
0.6
150
4
15
150
2 kΩ
SOIC8
0.15
0.75
1.5
40
4
15
150
2 kΩ
MSOP8
0.15
0.75
1.5
35
2
2
125
5.5 kΩ
SOIC8
0.15
0.75
1.5
35
2
2
125
2.2 kΩ
DFN6
AAL024-10
0.15
1.05
1.5
35
2
2
125
2.2 kΩ
DFN6
ALT022-20
-0.25
+0.25
0.5
200
3
10
125
20 kΩ
WLCSP
ALT002-14
-0.25
+0.25
0.5
200
3
10
125
20 kΩ
DFN4
ALT021-10
-0.25
+0.25
0.5
500
3
10
125
20 kΩ
DFN6
ALT023-10
-1
+1
1.5
200
0.1
5
125
20 kΩ
DFN6
ALT024-10
-2
+2
3
120
0.1
1
125
20 kΩ
DFN6
ALT025-10
-10
+10
30
20
0.1
1
125
20 kΩ
DFN6
50
800
1500
0.05
2
4
85
1 MΩ
DFN4

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


Gradiometers
Part
Number		 Linear Range (|mT|)  Saturation 
(|mT|)		  Element 
Spacing
(mm)		  Max. Non- 
Linearity
(% Uni.) 		Maximum
 Hysteresis 
(% Uni.)		  Max. Op. 
Temp.
(°C)		 Typical
 Resistance 		  Package 
Min.
Max.
2
20
25
0.5
2
4
125
2.5 kΩ
SOIC8
2
20
25
0.5
2
4
125
2.5 kΩ
MSOP8
0.5
4
7
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 
3 mT
125°C
1.25 MΩ
TDFN6
Half bridge
3 mT
40 kΩ
Half bridge
1.5 mT
1.25 MΩ
Half bridge
3 mT
6 MΩ
400 mV/V
Full bridge
3 mT
625 kΩ
680 mV/V
Half bridge
0.1 mT
2 MΩ

Current Sensors
Part
Number
Current
Measurement Range (mA)
 Sensitivity
 (mV/V/mA) 		  Max. Non- 
Linearity		  Max. Op. 
Temp.
(°C)		 Typical
 Resistance 		  Package 
Min.
Max.
-500
500
0.04
1%
150
7 kΩ
TDFN6

Sensor Reference Designs

Sensor output vs. magnet distance calculator

 GMR analog sensor datasheet

 ALT-Series TMR analog sensor datasheet

 AAV-Series current sensor datasheet

 AAT001/AAT009 angle sensor datasheet