PDF《MTR611》

magntek.

de | Magnetic Tech Makes Magic Change Rev Magnetic Angle Position Sensor MTR611 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 1.2 2019.03

1 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. Applications ? High Accuracy Angular Position Sensing ? Rotary Speed and Direction Detection ? Contactless Angle Detection ? Motor Control ? Robotics Control Pin Definition Num. 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 magntek.de | Magnetic Tech Makes Magic Change Rev Magnetic Angle Position Sensor MTR611 1.2 2019.03

2 80 60 40 20

0 20

40 60

80 0

15 30

45 60

75 90

105 120

135 150

165 180 Output?voltage ( mV ) 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 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

2 cos 2α V α V

2 sin 2α magntek.de | Magnetic Tech Makes Magic Change Rev Magnetic Angle Position Sensor MTR611 1.2 2019.03

3 Figure 3: Typical Arrangement of MTR611 and Magnet Block Diagram Figure 4: Block Diagram Vs Vs B+ B- A+ A- magntek.de | Magnetic Tech Makes Magic Change Rev Magnetic Angle Position Sensor MTR611 1.2 2019.03

4 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 Symbol Parameter Conditions/Notes Min. Typ. Max. Unit Vs Supply Voltage - 5.0 12.0 V ROUT Bridge Resistance 0.8 1.0 1.2 KΩ Is Supply Current - 5.0 - mA S Sensitivity S=Vamp*π/180 1.66 2.00 2.36 mV/° Vamp Output Amplitude (peak to peak)

95 115

135 mV Vos Offset Voltage -2.0 - 2.0 mV/V K Synchronism (VampA/VampB)*100

97 -

103 % OE Orthogonality Error -1.0 - 1.0 ° TCA Temperature Coefficient for Output Amplitude -3300 ppm/℃ TCR Temperature Coefficient for Bridge Resistance

2800 ppm/℃ Vampd Output Amplitude Temperature Drift TA=-40℃~125℃ -45

33 % Vosd Offset Voltage Temperature Drift TA=-40℃~125℃ -300

300 uV/V Electrical and Magnetic Characteristics At Vs=5.0V and TA=25℃ (Unless other specified) magntek.de | Magnetic Tech Makes Magic Change Rev Magnetic Angle Position Sensor MTR611 1.2 2019.03

5 Application Circuit Figure 5: MTR611 Followed by Differential-to-Single-End Amplification Circuit Figure 6: MTR611 with Optional Offset Trimming Circuits VCC 5.0V Gnd Bridge A U1 MTR611 A- A+ 10.0k 10.0k 249k Vref - + AMP .01uf 249k U2A B- B+ 10.0k 10.0k 249k Vref - + AMP .01uf 249k U2B AN0 AN1 Microcontroller U2 Vs Bridge B magntek.de | Magnetic Tech Makes Magic Change Rev Magnetic Angle Position Sensor MTR611 1.2 2019.03

6 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?