Current sensor, also known asMagnetic sensorMany magnetic sensors are used in our daily lives, such as computer hard drives, compasses, household appliances, smart grids, electric vehicles, wind turbines, and so on.

And ordinary devicesmeasureThe current passing through the device is very simple because the current level is relatively high, in the milliampere or even ampere range. With the popularity of mobile smart devices, the application of the Internet of Things, and the development of biotechnology, today's devices have working currents as low as microamperes or even lower, requiring more complex equipment for measurement.

Current Sensor Based on TMR (Tunnel Magnetoresistance) Effect

TMR magnetic induction technology was first applied in the field of computer hard drives in 2004, which led to a qualitative leap in the storage density of hard drives. Single disc TB level storage hard drives entered the civilian market. After nearly 10 years of development, TMR technology is still full of vitality.

TMR magnetic induction effect can be considered as the fourth generation magnetic induction technology. Sensitivity, resolution, power consumption, and temperature characteristics have all been improved by more than 10 times. Full chip level process control provides reliable quality and reasonable prices.

Current sensors manufactured based on TMR chips have excellent performance in high sensitivity, temperature stability, anti-interference, miniaturization, integration, intelligence, and low power consumption.

TMR current sensors have the following characteristics:

1. High sensitivity. The strength of the detected signal is getting weaker and weaker, which requires magnetismsensorThe sensitivity has been greatly improved. Applications include current sensors, angle sensors, gear sensors, and space environment measurement.

2. Temperature stability. More and more application fields require sensors to work in increasingly harsh environments, which requires magnetic sensors to have good temperature stability. Industry applications include the automotive electronics industry.

3. Anti interference capability. In many fields, there is no evaluation of the usage environment of sensors, which requires sensors to have good anti-interference properties. Including automotive electronics, water meters, and so on.

4. Miniaturization, integration, and intelligence. To achieve the above requirements, chip level integration, module level integration, and product level integration are required.

5. High frequency characteristics. With the promotion of application fields, the working frequency of sensors is required to be higher and higher, including water meters, automotive electronics industry, and information recording industry.

6. Low power consumption. Many fields require sensors to have extremely low power consumption to extend their lifespan. Applied to implanted magnetic biochips, compasses, and other devices in the body.

Comparison of Technical Parameters of Hall Elements, AMR Elements, GMR Elements, and TMR Elements

Multidimensional Technology launches industry's first microampere TMR current sensor

World leading magnetic sensor manufacturer Jiangsu Multidimensional Technology Co., Ltd. (Mul)tiDimensionTeTechnology (MDT) recently launched the industry's first microampere TMR current sensor, TMR-MAC005.

Micro ampere TMR current sensor TMR-MAC005

This product adopts high-sensitivity TMR sensor technology and anti external magnetic interference design, with built-in integrated coils. It has performance characteristics such as wide range (± 10 mA), ultra-high resolution (150 nA), and ultra wide working temperature range (-40 ℃ to+125 ℃).

TMR-MAC005 adopts the standard SOP8 packaging form.

TMR-MAC005 meets the application requirements of various weak current detection, biological current detection, industrial sensors, and instrument equipment.

MDT is the first bulk supplier of TMR sensors, available in multiple product lines including TMR magnetic switches, TMR/AMR linear magnetic field sensors, TMR/AMR angle sensors, TMR gear sensors, TMR magnetic image sensorsUSBMagnetometer, TMR rotationencoderTheTemperature sensorWait. MDT also provides comprehensive service options, including TMR/GMR/AMR sensor wafer customization and foundry, TMR/GMR/AMR sensor chip customization and mass production, sensor module customization, and application solutions.

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