MT6815CT-AJD

MT6815 Magnetic Angle Position Encoder Sensor Features and Benefits ￭ Based on advanced AMR Sensing Technology with 0°~360° Full Range Angle Sensing ￭ Contactless Angle Measurement ￭ Independent Output Interface: I2C, SPI, Analog， ABZ, PWM and UVW ￭ Incremental ABZ programmable binary and decimal pulse-counts: 32, 48, 64, 128, 256, 512, 1024, 2048, 100, 200, 500, 1000, 2000, 2500 pulses per cycle ￭ 14 bit Core Resolution ￭ 12 bit DAC/PWM Resolution ￭ User Programmable Resolution & Zero Index Position ￭ RoHS Compliant 2011/65/EU ￭ SOP-8 or QFN-16 Package General Description The MagnTek rotary position sensor MT6815 is an IC based on advanced AMR magnetic sensing technology. A rotating magnetic field in the x-y sensor plane delivers two sinusoidal output signals indicating the angle (α) between the sensor and the magnetic field direction. Within a homogeneous field in the x-y plane, the output signals are relatively independent of the physical placement in the z direction. The sensor is only sensitive to the magnetic field direction as the sensing element output is specially designed to be independent from the magnet field strength. This allows the device to be less sensitive to magnet variations, stray magnetic fields, air gap changes and off-axis misalignment. Applications ￭ Absolute Linear Position Sensor ￭ BLDC Motor Control ￭ Robotics Control ￭ Contactless Potentiometer ￭ Power Tools www.magntek.com.cn | Magnetic Tech Makes Magic Change The incremental ABZ output mode is available in this sensor series, making the chip suitable to replace various optical encoders. The maximum resolution is 2048 pulse/8192 steps per revolution in binary mode and 2500 pulse/10000 steps per revolution in decimal mode. A standard I2C or SPI (3-Wire or 4-Wrie) interface allows a host microcontroller to read the 14-bit absolute angle position data from MT6815. The absolute angle position is also provided as PWM output or linear analog signal proportional to VDD from a 12 bit DAC. 1 Rev 3.0 2019.11 MT6815 Magnetic Angle Position Encoder Sensor Table of Contents Features and Benefits………….……………..……………...…………………………………….…….………1 Applications……………………………….……….…………………………………………………………….…….1 General Description……..………………..…………………………………….…………………………………1 1 Pin Configuration…………………………..…………………..……………………………..……….…….3 1.1 SOP-8 Package……...…………………….…………………...………………………………………………3 1.2 QFN-16 Package…….…………….…………………………………………………………………………….4 2 Function Diagram………….………………………………………………………….………………………5 3 Absolute Maximum Ratings……………………………………………………………………………..5 4 Electrical Characteristics…………………………………….……………………………………...……..6 5 Magnetic Input Specifications..………………………….……………………………………...……..7 6 Output Mode……………………………………………………………………………..…………..………….8 6.1 I/O Pin Configuration……..…………….…….…………………...……………………….…………….…8 6.2 Step, Direction and Index Output Signal (SDI Mode).…………………………..……..…..10 6.3 Quadrature A,B and Zero-Position Output Signal (ABZ Mode) …….…..…..10 6.4 UVW Output Mode……………………….………………………...……………………..……..….12 6.5 Analog Output Mode…………………….……………….………...……..…….……………..……..….13 6.6 Pulse Width Modulation (PWM) Output Mode………...………………………………….…15 6.7 I2C Interface………………..……………….……………………………...…….………………………….…16 6.7.1 I2C Timing Diagram……………..…..…...…….……………..…………………..…………..….16 6.7.2 I2C Read Angle Registers….….…………………………...………………………………….…17 6.7.3 I2C Burst Read………………….….…………………………...………………………………….…18 6.7.4 I2C Write………………………..….….…………………………...………………………………….…18 6.8 SPI Interface…………….……………………..……..………………………………………………….19 6.8.1 SPI Timing Diagram…………………….………………..…….…………………………………….20 6.8.2 4-Wire SPI………...………..………….…………………………...………………………………….…21 6.8.3 3-Wire SPI............………………………….………………..…….…………………………………….21 6.8.4 SPI Read Angle Register…………..………………………...………………………………….…22 7 Magnet Placement…………………..……..………….…………………………………………………………….24 8 Mechanical Angle Direction….……….….…….…………………………………….……………………….25 9 Package Information……..……………..….…….………………….……………………………………...……..26 9.1 SOP-8 Package………………….…..…………………………...……………………………………………26 9.2 QFN-16 Package…………..….…..………….……………………………………………………….……. 27 10 Copy Rights and Disclaimer…….……………………………………………………………….……...……..28 www.magntek.com.cn | Magnetic Tech Makes Magic Change 2 Rev 3.0 2019.11 MT6815 Magnetic Angle Position Encoder Sensor 1. Pin Configuration 1. 1 SOP-8 Package Figure 1: Pin Configuration for SOP-8 Package Pin List Name # Type Description CSN 1 Digital Input SPI/I2C Selection HVPP 2 Analog Input OTP Programming Supply or SPI/I2C Selection OUT 3 Analog/Digital Output Analog or PWM Output VDD 4 Power Supply 3.3~5.0V Supply A/U 5 Digital Input/output Incremental Signal A/U or Speed or SPI MOSI, SDAT or I2C Data B/V 6 Digital Input/output Incremental Signal B/V or Direction or SPI MISO Z/W 7 Digital Input Incremental Signal Z/W or Index or SPI Clock or I2C Clock GND 8 Ground Ground Family Members Part Number Description MT6815CT SOP-8 Package, Tube Pack (100pcs/Tube) or Tape & Reel Pack (3000pcs/Reel) *SOP-8 Reflow Sensitivity Classification: MSL-3 www.magntek.com.cn | Magnetic Tech Makes Magic Change 3 Rev 3.0 2019.11 MT6815 Magnetic Angle Position Encoder Sensor 1. 2 QFN-16 Package Figure 2: Pin Configuration for QFN-16 Package Pin List Name # Type Description A 1 Digital Input/output Incremental Signal A or Speed or SPI MOSI, SDAT or I2C Data B 2 Digital Input/output Incremental Signal B or Direction or SPI MISO Z 3 Digital Input Incremental Signal Z or Index or SPI Clock or I2C Clock GND 4 Ground Ground CSN 5 Digital Input SPI/I2C Selection NC 6 - - NC 7 - - NC 8 NC 9 - - NC 10 - - OUT 11 Analog/Digital Output Analog or PWM Output HVPP 12 Analog Input OTP Programming Supply or SPI/I2C Selection W 13 - Incremental Output W V 14 - Incremental Output V or –B U 15 - Incremental Output U or –A VDD 16 Power Supply 3.3~5.0V Supply - Family Members Part Number Description MT6815QT QFN-16 Package, Reel Pack (3000pcs/Reel) *QFN-16 Reflow Sensitivity Classification: MSL-1 www.magntek.com.cn | Magnetic Tech Makes Magic Change 4 Rev 3.0 2019.11 MT6815 Magnetic Angle Position Encoder Sensor 2. Functional Diagram The MT6815 is manufactured in a CMOS standard process and uses advanced magnet sensing technology to sense the magnetic field distribution across the surface of the chip. The integrated magnetic sensing element array is placed around the center of the device and delivers a voltage representation of the magnetic field at the surface of the IC. Figure 3: Block Diagram Figure 3 shows a simplified block diagram of the chip, consisting of the magnetic sensing element modeled by two interleaved Wheatstone bridges to generate cosine and sine signals, gain stages, analog-to-digital converters (ADC) for signal conditioning, and a digital signal processing (DSP) unit for encoding. Other supporting blocks such as LDO, etc. are also included. 3. Absolute Maximum Ratings (Non-Operating) Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated under “Operating Conditions” is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Name Min. Max. Unit DC Voltage at Pin VDD -0.5 7 V DC Voltage at Pin HVPP -0.5 8 V Storage Temperature -55 150 ℃ Operating Temperature -40 125 ℃ Electrostatic Discharge (HBM) - ±3.0 KV Electrostatic Discharge (CDM) - ±1.5 KV www.magntek.com.cn | Magnetic Tech Makes Magic Change 5 Rev 3.0 2019.11 MT6815 Magnetic Angle Position Encoder Sensor 4. Electrical Characteristics Operation conditions: Ta=-40 to 125℃, VDD=3.0~5.5V unless otherwise noted. Symbol Parameter Conditions/Notes Min. Typ. Max. Unit VDD Supply Voltage - 3.0 3.3~5.0 5.5 V HVPP Supply Voltage - 6.75 7.0 7.25 V Idd Supply Current - - 6.0 9.0 mA LSB Resolution (ABZ or SDI Mode) N Steps per Cycle INL Integral Non-Linearity Note (1) - ±1 ±1.5 ° DNL Differential Non-Linearity (ABZ or SDI Mode), Figure 4 ≤10 bit - - ±0.1 LSB >10bit - - ±0.03 ° TN Transition Noise (ABZ or SDI Mode) 25℃ - - 0.011 °rms Hyst Hysteresis (ABZ Mode) ≤12bit - 0.5 - LSB >12bit - 0.176 - ° TPwrUp Power-Up Time VDD Ramp