MTR611CT

MTR611 Magnetic Angle Position Sensor Features and Benefits ￭ Based on AMR Sensing Technology ￭ Contactless Angle Measurement ￭ Wide Voltage Range up to 12V ￭ Wide Operation Temperature Range from -40℃ ~125℃ ￭ RoHS Compliant 2011/65/EU Applications ￭ High Accuracy Angular Position Sensing ￭ Rotary Speed and Direction Detection ￭ Contactless Angle Detection ￭ Motor Control ￭ Robotics Control Pin Definition General Description The MTR611 is a magnetic field sensor IC based on advanced Anisotropic Magneto Resistor (AMR) technology. It creates an analog output voltage that varies with the direction of the magnetic flux passing over the sensor surface. It contains dual whetstones bridges operating in saturation mode and generating quadrature (sine and cosine) signals to perform angular measurement up to 180 degrees. It can operate under a wide supply voltage range and a wide temperature range. Combined with appropriate signal conditioning circuit, MTR611 is ideal for use in position sensing, rotary speed and direction detection systems. Num. magntek.de | Magnetic Tech Makes Magic Change 1 Name Description 1 B- Negative output of Bridge B 2 A- Negative output of Bridge A 3 NC Not Connected 4 Vs Bridge Supply Voltage 5 B+ Positive Output Bridge B 6 A+ Positive Output Bridge A 7 NC Not Connected 8 Gnd Ground Rev 1.2 2019.03 MTR611 Magnetic Angle Position Sensor Figure 1 and 2 shows the basic operation of the sensor. When an external magnetic field rotates clockwise, output A and B produce cosine and sine waveforms respectively, as also shown in the expressions below. V α V α 45 60 V 2 V 2 cos 2α sin 2α 80 60 Output voltage（mV） 40 20 0 0 15 30 75 90 105 120 135 150 165 180 ‐20 ‐40 ‐60 ‐80 angle (deg） Figure 1: Typical Transfer Curve of MTR611 at room Temperature and the Magnet is Rotating in the Clockwise Direction from a Top-down View. (Bridge A Output=Red curve; Bridge B Output=Black Curve) Figure 2: Magnetic Field Rotation Direction and the Definition of Zero Degree Position magntek.de | Magnetic Tech Makes Magic Change 2 Rev 1.2 2019.03 MTR611 Magnetic Angle Position Sensor Figure 3: Typical Arrangement of MTR611 and Magnet Block Diagram Vs B+ B- Vs A+ A- Figure 4: Block Diagram magntek.de | Magnetic Tech Makes Magic Change 3 Rev 1.2 2019.03 MTR611 Magnetic Angle Position Sensor Absolute Maximum Rating Absolute maximum ratings are limiting values to be applied individually, and beyond which the serviceability of the circuit may be impaired. Functional operability is not necessarily implied. Exposure to absolute maximum rating conditions for an extended period of time may affect device reliability. Absolute maximum ratings: all voltages listed are referenced to GND. Symbol Paramters Min. Max. Unit Vs Supply Voltage -12 12 V Pd Power Dissipation 200 mW TA Operation Temperature -40 125 ℃ B Magnetic Flux 200 10000 Guass ESD (HBM) Electro-Static Discharge ±1000 V Electrical and Magnetic Characteristics At Vs=5.0V and TA=25℃ (Unless other specified) Symbol Parameter Conditions/Notes Vs Supply Voltage - ROUT Bridge Resistance Is Supply Current S Sensitivity Vamp Output Amplitude (peak to peak) Vos Offset Voltage K Synchronism OE Orthogonality Error TCA TCR Vampd Vosd S=Vamp*π/180 (VampA/VampB)*100 Min. Typ. Max. 5.0 12.0 V 0.8 1.0 1.2 KΩ - 5.0 - mA 1.66 2.00 2.36 mV/° 95 115 135 mV -2.0 - 2.0 mV/V 97 - 103 % -1.0 - 1.0 ° Temperature Coefficient for Output Amplitude Temperature Coefficient for Bridge Resistance Output Amplitude Temperature Drift Offset Voltage Temperature Drift Unit -3300 ppm/℃ 2800 ppm/℃ TA=-40℃~125℃ -45 33 % TA=-40℃~125℃ -300 300 uV/V magntek.de | Magnetic Tech Makes Magic Change 4 Rev 1.2 2019.03 MTR611 Magnetic Angle Position Sensor Application Circuit U1 VCC 5.0V Vs U2 .01uf Bridge A AA+ 249k 10.0k + 10.0k AMP AN0 U2A Microcontroller 249k Vref MTR611 .01uf Bridge B BB+ Gnd 249k 10.0k + 10.0k AMP AN1 U2B 249k Vref Figure 5: MTR611 Followed by Differential-to-Single-End Amplification Circuit Figure 6: MTR611 with Optional Offset Trimming Circuits magntek.de | Magnetic Tech Makes Magic Change 5 Rev 1.2 2019.03 MTR611 Magnetic Angle Position Sensor Package Information (SOP-8) Symbol Dimensions in Millimeters Dimensions in Inches Min. Max. Min. Max A 1.350 1.750 0.053 0.069 A1 0.100 0.250 0.004 0.010 A2 1.350 1.550 0.053 0.061 b 0.330 0.510 0.013 0.020 c 0.170 0.250 0.007 0.010 D 4.700 5.100 0.185 0.201 E 5.800 6.200 0.228 0.244 E1 3.800 4.000 0.150 0.157 e 1.270(BSC) 0.050(BSC) L 0.400 0.800 0.016 0.031 θ 0˚ 8˚ 0˚ 8˚ magntek.de | Magnetic Tech Makes Magic Change 6 Rev 1.2 2019.03