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Play Sensor Demo Video Video  GMR Switch Sensor
Demonstration (02:14)
 
GMR Switch™ Precision Digital Sensors
Unmatched Sensitivity and Precision

GMR Switches integrate GMR sensor elements with digital signal processing electronics. These sensors are more precise than other magnetic switches, and their magnetic operate points are stable over voltage and temperature extremes.

GMR Switches can operate over a wide range of magnetic fields, are available in a variety of supply ranges, and come in SOIC8, MSOP8, 2.5 mm x 2.5 mm TDFN6 packages, and 1.1 x 1.1 mm ULLGA packages.

NVE offers six series of magnetic switch sensors, as summarized below:
 
 Switch Series 
 Packages 
Supply
 Voltage 
 Min. 
 Operate Point 
  Response  
Output
 Current 
Duty-Cycled
   Versions? 
  
Operating
 Temperature 
DFN/MSOP
4.5 – 30 V
1 mT
Normal
(Omnipolar)
20 mA
N
–40 – 125C
DFN
0.4 mT
Bipolar
TDFN/MSOP
0.9 – 5.5 V
 (4 ranges) 
0.4 mT
Normal
(Omnipolar)
100 µA
–20 – 85C
 1.1 mm x 1.1 mm 
ULLGA
2.4 – 4.2 V
2 mT
Y (for ultralow power) –40 – 125C
0.9 – 2.4 V
1 mT
–40 – 85C
ADT-Series 2.4 – 4.2 V 1.5 mT N (ultralow power
without duty-cycling)
–40 – 85C
0.9 – 1.8V 1.5 mT

Typical magnetic operate points range from 0.4 to 8 mT as shown in the following chart:

Operate and Release Points

AD-Series Precision GMR Digital Sensors are the industry standard for sensitivity and precision. Models available in a wide variety of magnetic operate points, output configurations, and package types. Parts have 20 mA output drive capability. AD8xx and AD9xx versions also have Short-Circuit Protection (SCP) circuitry. The most popular models are listed below:

AD-Series TDFN/MSOP Digital Sensors (4.5 V – 30 V; 20 mA outputs)
 Part Number 
 Typical Magnetic Operate Point 
Typical Magnetic Release Point 
Magnetic
 Orientation 
  Output Type  
Max. Operating Temperature 
 Package 
2 mT
1 mT
Standard
Sink
125C
MSOP8
4 mT
2.5 mT
Standard
Sink
MSOP8
8 mT
5 mT
Standard
Sink
MSOP8
2 mT
1 mT
Cross-axis
Sink
MSOP8
4 mT
2.5 mT
Cross-axis
Sink
MSOP8
2.8 mT
1.4 mT
Cross-axis
Sink
MSOP8
2.8 mT
1.4 mT
Cross-axis
Sink
TDFN6
8 mT
5 mT
Cross-axis
Sink
MSOP8
AD621-00E
2 mT
1 mT
Cross-axis
Sink+Source
MSOP8
AD824-00E
2.8 mT
1.4 mT
Cross-axis
2 Sinks + SCP
MSOP8
1 mT
0.5 mT
Standard
Sink
150C
MSOP8

 AD‑Series data sheet (.pdf)

 AD‑Series Sensor Evaluation Kit


The ADV001-00E is a GMR Digital Switch using a bipolar output GMR material. This material allows the sensor to maintain an operate point with the application of a negative (south) magnetic field, and a release point with the application of a positive (north) magnetic field. The part is ideal for use with magnetic encoders that have alternating north/south poles, or in any other application where one polarity of field is required to turn the part on, and the opposite polarity is required to turn it off. Available in RoHS-compliant MSOP8 or 2.5 mm x 2.5 mm DFN packages.

Summary specifications are as follows:

ADV001-Series Bipolar TDFN Digital Sensors
Parameter
Min.
Typ.
Max.
Units
Magnetic Operate Point
–1
–0.4
0
mT
Magnetic Release Point
0
0.4
1
Operate/Release Differential
0.2
1.2
Operating Supply Voltage
4.5
30
Volts
Quiescent Supply Current (Vcc = 12V)
2.5
4.5
mA
Output Drive Current
0
20
mA
VOL at 20 mA Output Drive Current    
0.4
Volts
Frequency Response
100
 
kHz
Temperature Range of Operation
–40
125
C

 ADV001‑Series data sheet (.pdf)

Video   ADV001 Demonstration Video  
 Buy ADV001-00E Online


AFL-Series Low-Voltage GMR Digital Sensors are available in a wide variety of voltages, output types, magnetic operate points, and package types. Operating voltages are as low as 0.9 volts for single-cell operation, and magnetic operate points are as low as 0.4 mT (the world’s most sensitive magnetic switches). The most popular part types are summarized below:
 
AFL-Series TDFN/MSOP Digital Sensors
Part Number
 Voltage Range
Output Type
Magnetic Operate Point
Package
0.9 V 2 V
Normally Off,
Current Sink
1 mT
TDFN6
0.9 V 2 V
Normally Off,
Current Sink
0.4 mT
TDFN6
AFL000-01
0.9 V 2 V
Normally Off,
Current Sink
1 mT
 Die (IC only) 
AFL002-10E
0.9 V 2 V
Normally Off,
Current Sink
2.8 mT
TDFN6
AFL020-00E
0.9 V 2 V
Normally On,
Current Source
1 mT
MSOP8
AFL030-00E
0.9 V 2 V
Normally Off,
Current Source
1 mT
MSOP8
AFL100-00E
1.8 V 2.5 V
Normally Off,
Current Sink
1 mT
MSOP8
AFL100-10E
1.8 V 2.5 V
Normally Off,
Current Sink
1 mT
TDFN6
AFL103-01
1.8 V 2.5 V
Normally Off,
Current Sink
4 mT
Die (IC only)
2.7 V 3.6 V
Normally Off,
Current Sink
1 mT
MSOP8
AFL300-00E
4.5 V 5.5 V
Normally Off,
Current Sink
1 mT
MSOP8

 AFL‑Series data sheet (.pdf)


ADL-Series are ultaminiature sensors designed for 3.3V supplies or single lithium cells. Internally duty cycled versions conserve power. Continuously-operating versions (the ADL9xx Series) are available, with a frequency response of 250 kHz. Two different duty-cycle frequencies are available (ADL0xx and ADL1xx Series), offering a trade-off between power consumption and update frequency. Integrated make the outputs continuously available for duty-cycled versions.

Key ADL-Series specifications are:
  • 1.1 mm x 1.1 mm x 0.45 mm ULLGA package
  • 2.4 – 3.6 V supply voltage
  • Typ. power consumption as low as 72 nW at 2.4 V
  • 2, 2.8, or 4 mT operate points
  • 100 µA current-sinking output
  • –40°C to 125°C temperature range

Play Video Video  ADL-Series Nanopower Magnetic Sensor Demonstration  
Play Video Video  Sensors run forever
on a watch battery
 
Play Video Video  ADL-Series Sensor
Evaluation Kit
 


ADL-Series 1.1 mm x 1.1 mm Digital Sensors (2.4 – 3.6 V)
Part
Number
 Typ. Magnetic 
Operate Point
Max. Quiescent
 Current at 2.4 V 
Max. Quiescent
 Current at 3.6 V 
 Typ. Update 
Frequency
Package
2 mT
0.16 A
0.305 A
55 Hz
1.1 mm x 1.1 mm
ULLGA
ADL022-14E
4 mT
2.8 mT
2 mT
0.06 A
0.16 A
30 Hz
ADL122-14E
4 mT
2.8 mT
2 mT
50 A
120 A
Continuous
ADL922-14E
4 mT
2.8 mT

 ADL‑Series data sheet (.pdf)

ADT Evaluation Kit
Evaluation Kit

 ADL021 Evaluation Boards


AHL-Series sensors are ultraminiature magnetic switches designed to run on 1.5V batteries with extremely low power. Continuously-operating versions (the AHL9xx Series) have a wide frequency response. Internally duty cycled versions (the AHL0xx Series) provide nanowatt power consumption. AHL-Series sensors are ideal for battery-powered devices such as gas and water meters, or portable instruments.

Key AHL-Series specifications are:
  • 1.1 mm x 1.1 mm x 0.45 mm ULLGA package
  • 0.9 – 2.4 V supply voltage
  • Power consumption <1 W (duty-cycled vesrions)
  • 1, 2, or 2.8 mT operate points
  • Current-sinking output up to 100 A
  • –40C to +85C temperature range
Standard part types are listed below (bare die and custom parts are also available):

AHL-Series 1.1 x 1.1 mm Low-Voltage (0.9 V – 2.4 V) Digital Sensors
Part
Number
Typ. Magnetic 
Operate Point
Typ. Quiescent
 Current at 1.4 V 
Max. Quiescent
 Current at 2.4 V
Operating Mode
Package
AHL021-14E
2 mT
0.095 A
0.65 A
Duty Cycled
1.1 mm x 1.1 mm ULLGA
AHL024-14E
2.8 mT
AHL025-14E
1 mT
AHL921-14E
2 mT
35 A
110 A
Continuous
AHL924-14E
2.8 mT
AHL925-14E
1 mT

 AHL‑Series data sheet (.pdf)


AHT-Series and AHT-Series sensors are nanopower TMR magnetic switches without duty cycling; designed to run on 1.5V batteries. Becasue they are inherently low power without duty cycling, they can respond much faster than duty cycled sensors.

Key AHT/ADT specifications are:
  • 1.1 mm x 1.1 mm x 0.45 mm ULLGA package
  • 0.9 – 1.8 V (AHT-Series for single alkaline cell) or 2.4 – 4.2 V (ADT-Series for lithium batteries)
  • Inherently low power
  • High switching speeds
  • 1.5, 2.2, 3.2, or 4.5 mT operate points
  • Current-sinking output up to 100 A
  • –40C to +85C temperature range
Standard part types are listed below (bare die and custom parts are also available):

ADT- and AHT-Series 1.1 x 1.1 mm TMR Digital Sensors
   Part Type   
Typ.
 Magnetic 
Operate
Point
Supply
Voltage
 Quiescent 
Current
 Switching
Speed  
Package
ADT925-14E 1.5 mT  2.4 – 4.2 V 
1 A
20 kHz
1.1 mm x 1.1 mm
ULLGA
ADT924-14E 2.2 mT 2.4 – 4.2 V 20 kHz
ADT923-14E 3.2 mT 2.4 – 4.2 V 20 kHz
ADT922-14E 4.5 mT 2.4 – 4.2 V 20 kHz
AHT925-14E 1.5 mT 0.9 – 1.8 V 0.6 A 3 kHz
AHT924-14E 2.2 mT 0.9 – 1.8 V 3 kHz
AHT923-14E 3.2 mT 0.9 – 1.8 V 3 kHz
AHT922-14E 4.5 mT 0.9 – 1.8 V 3 kHz
 
 ADT‑Series data sheet (.pdf)


 AHT‑Series data sheet (.pdf)




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