MMA253F MULTIDIMENSION | Alldatasheet

Document overview

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Technical content

MultiDimension Technology Co., Ltd. Page 1 of 4 Website: www.dowaytech.com/en, Email: info@dowaytech.com MDT MMA253F No.7 Guangdong Road, Zhangjiagang Free Trade Zone, Jiangsu, 215634, P.R.China Ver. 1.1 TMR ANGLE SENSOR MMA253F MMA253F TMR Dual-Axis Angle Sensor Features and Benefits  Tunneling Magnetoresistance (TMR) Technology  Large Output Signal without Amplification  Dual-Axis 360° Angle Measurement  Compatible with Wide Range of Supply V oltages  High Resistance for Low Power Consumption  Wide Air-Gap Tolerance  Excellent Thermal Stability  Compact LGA Package

Applications

 Rotary Position Sensors  Rotary Encoders  Contactless Potentiometers  V alve Position Sensors  Knob Position Sensors General Description The dual-axis output voltages of the MMA253F TMR angle sensor are proportional to the sine and 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 MMA253F 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 100% of the supply voltage, eliminating the need for 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 a compact LGA8 package of 3.0 mm  3.0 mm  0.9 mm. Operation A small magnet , placed above the MMA253F, can be used to provide a magnetic field in any desired orientation parallel to the plane of the MMA253F package. The magnetic field is detected by TMR sensors in the MMA253F that are composed of two magnetic 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 measure of the orientation of the magnet.

MultiDimension Technology Co., Ltd. Page 2 of 4 Website: www.dowaytech.com/en, Email: info@dowaytech.com MDT MMA253F No.7 Guangdong Road, Zhangjiagang Free Trade Zone, Jiangsu, 215634, P.R.China Ver. 1.1 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. Pinout (Bottom View) (Top view) A253F Y WW X G X: lot code WW: week code Y: year code

MultiDimension Technology Co., Ltd. Page 3 of 4 Website: www.dowaytech.com/en, Email: info@dowaytech.com MDT MMA253F No.7 Guangdong Road, Zhangjiagang Free Trade Zone, Jiangsu, 215634, P.R.China Ver. 1.1 (Bridge Schematic) 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 7 V External Magnetic Field Hext 3000 Oe (1) ESD V oltage VESD 4000 V Operating Temperature TA -40 ~ 85 °C Storage Temperature Tstg -40 ~ 105 °C Specification (VCC=1.0V , TA=25 ° C, Differential Output) Parameter Symbol Conditions Min Typ Max Unit Supply V oltage VCC Operating 1 7 V Bridge Resistance R Operating 200 280 (2) 360 kOhm Peak V oltage Vpeak Operating 1030 mV/V Offset V oltage Voffset Angle = 0° -10 10 mV/V Magnetic Field H Operating 100 400 Oe Angular Error Δα Operating ± 2.5 ° Operation Coefficient of Peak V oltage TCVpeak TA in -40~85°C -970 PPM/°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.

MultiDimension Technology Co., Ltd. Page 4 of 4 Website: www.dowaytech.com/en, Email: info@dowaytech.com MDT MMA253F No.7 Guangdong Road, Zhangjiagang Free Trade Zone, Jiangsu, 215634, P.R.China Ver. 1.1

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 applica tion 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 applications.