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/ALT-Series, and the AAV-Series. Their key characteristics are summarized in the following table:
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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- and ALT-Series sensors are Tunneling Magnetoresistance sensors with very
high sensitivity.
AA-Series GMR Analog Sensor Demonstration
Sensing Current Through a Circuit Board Trace
High-Sensitivity Magnetic Sensor Demo
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
|
TDFN6
|
|
| AAL024-10 |
0.15
|
1.05
|
1.5
|
35
|
2
|
2
|
125
|
2.2 kΩ
|
TDFN6
(Cross-axis sensitivity) |
| ALT021-10 |
-0.25
|
+0.25
|
0.5
|
500
|
3
|
10
|
125
|
20 kΩ
|
TDFN6
(Cross-axis sensitivity) |
| ALT023-10 |
-1
|
+1
|
1.5
|
200
|
0.1
|
5
|
125
|
20 kΩ
|
TDFN6
(Cross-axis sensitivity) |
| ALT025-10 |
-10
|
+10
|
30
|
20
|
0.1
|
1
|
125
|
20 kΩ
|
TDFN6
(Cross-axis sensitivity) |
|
40
|
250
|
400
|
0.033
|
2
|
4
|
85
|
3.5 kΩ
|
DFN4 (ULLGA)
|
|
|
50
|
800
|
1500
|
0.05
|
2
|
4
|
85
|
1 MΩ
|
DFN4 (ULLGA)
|
|
Click on a magnetometer part type for more information:
| 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
|
|
| 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
GMR
analog sensor datasheet ALT-Series
TMR analog sensor datasheet AAV-Series
current sensor datasheet AAT001/AAT009
angle sensor datasheet