MMA243F MULTIDIMENSION | Alldatasheet
Document overview
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Technical content
MultiDimension Technology Co., Ltd. Page 1 of 4 Website: www.dowaytech.com, Email: info@dowaytech.com MDT MMA243F No.7 Guangdong Road, Zhangjiagang Free Trade Zone, Jiangsu, 215634, P.R.China Ver. 1.0 TMR Angle Sensor MMA243F MMA243F TMR Angle Sensor Features and Benefits Tunneling Magnetoresistance (TMR) Technology Large Output Signal Without Amplification Compatible with Wide Range of Supply V oltages High Resistance for Low Power Consumption Wide Airgap Tolerance Excellent Thermal Stability Very Low Hysteresis Ultrasmall Package
Applications
Rotary Position Sensors Rotary Encoders Contactless Potentiometers Valve Position Sensors Knob Position Sensors General Description The output voltage of the MMA243F TMR angle sensor is proportional to the sine or cosine of the angle of a magnetic field applied parallel to the surface of the sensor, which can be provided by a small magnet positioned above the device. The MMA243F includes two Wheatstone bridges, which can be configured to output sine and cosine functions respectively. Each bridge includes four TMR sensor elements in a push -pull arrangement to produce a best-in-class peak-to-peak signal as large as 80% of the supply voltage , eliminating the need f or amplification in many applications . Additionally, the unique TMR Wheatstone bridge technology accurately compensates the output against changes in ambient temperature. This sensor is assembled in an ultra small LGA8 package of 3.0 mm 3.0 mm 0.75 mm. Operation A small magnet , placed above the MMA243F, can be used to provide a magnetic field in any desired orientation parallel to the plane of the MMA243F package. The magnetic field is detected by TMR sensors in the MMA243F that are composed of two ma gnetic layers. One layer of the TMR sensors is a “pinned layer” that is not affected by the magnetic field, and the other is “free layer,” which has a magnetization that aligns parallel to the applied magnetic field. Because the TMR effect produces a resistance that is proportional to the sine or cosine of the relative difference between the free and pinned layer magnetization orientations, the sensor output voltage is sinusoidally dependent on the angle of the applied magnetic field , thereby providing a me asure of the orientation of the magnet.
MultiDimension Technology Co., Ltd. Page 2 of 4 Website: www.dowaytech.com, Email: info@dowaytech.com MDT MMA243F No.7 Guangdong Road, Zhangjiagang Free Trade Zone, Jiangsu, 215634, P.R.China Ver. 1.0 The following chart show a typical sensor output as a function of the angle of the applied magnetic field using a 6 mm diameter, 2.5 mm thick magnet and a 1 V supply. V oltage output vs. Angle
MultiDimension Technology Co., Ltd. Page 3 of 4 Website: www.dowaytech.com, Email: info@dowaytech.com MDT MMA243F No.7 Guangdong Road, Zhangjiagang Free Trade Zone, Jiangsu, 215634, P.R.China Ver. 1.0 Pinout (Top view) Pin# Pin Name Function
1 GNDX Ground(direction X)
2 X- Analog Differential Output2(direction X)
3 X+ Analog Differential Output1(direction X)
4 GNDY Ground(direction Y)
5 Y+ Analog Differential Output1(direction Y)
6 Y- Analog Differential Output2(direction Y)
7 VccX Supply V oltage(direction X)
8 VccY Supply V oltage(direction Y)
Parameter Symbol Limit Unit Supply V oltage VCC 6 V Storage Temperature Tstg -50 ~ 150 °C Magnetic Field B 2000 Oe1 ESD Level 4 kV Specification (Differential Output) Parameter Symbol Conditions Min Typ Max Unit Supply V oltage VCC TA = 25 °C 1 5 V Supply Current ICC TA = 25 °C 14 μA Resistance R TA = 25 °C 702 kOhm Output Range VO TA = 25 °C 800 mV/V Offset V oltage3 VOQ TA = 25 °C ±5 mV/V TCOV4 Operating -0.1 %/° C Magnetic Field B Operating 60 400 Oe1 Angular Error E Operating 1 Degree Operation Temperature TA Operating -40 125 °C Notes: (1) 1 Oe (Oersted) = 1 Gauss in air = 0.1 millitesla = 79.8 A/m. (2) Custom sensor resistance may be available upon request. Please contact MultiDimension Technology for more details. (3) Offset voltage is output voltage when angle = 0 degrees. (4) TCOV is the percent change in voltage output signal over temperature with a constant supply voltage.
MultiDimension Technology Co., Ltd. Page 4 of 4 Website: www.dowaytech.com, Email: info@dowaytech.com MDT MMA243F No.7 Guangdong Road, Zhangjiagang Free Trade Zone, Jiangsu, 215634, P.R.China Ver. 1.0
Package Information
Unit: mm The information provided herein by MultiDimension Technology Co. , Ltd. (hereinafter MultiDimension) is believed to be accurate and reliable. Publication neither conveys nor implies any license under patent or other industrial or intellectual property rights. MultiDimension reserves the right to make changes to product specifications for the purpose of improving product quality, reliability, and functionality. MultiDimension does not assume any liability arising out of the application and use of its products. MultiDimension’s customers using or selling this product for use in appliances, devices, or systems where malfunction can reasonably be expected to result in personal injury do so at their own risk and agree to fully indemnify MultiDimension for any damages resulting from such application.