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MT6835 is a new generation high-speed and high-precision angle encoder chip based on advanced anisotropic magnetoresistance (AMR) technology launched by Megaron Microelectronics. The chip integrates sensitive components consisting of two pairs of AMR Wheatstone bridges arranged in a 4-5 ^ { circle} configuration, as well as high-performance dedicated signal processing circuits. Due to the fact that AMR devices operate in the saturation region (with a saturation magnetic field of 300 Gauss) when used for angle measurement applications, in actual operation, the chip only responds to changes in the direction of the magnetic field parallel to the chip surface, regardless of the magnetic field strength. Therefore, during the use of MT6835, the requirements for the machining error of the magnet itself and the installation distance error between the magnet and the chip are relatively low.
MT6835 provides an incremental ABZ output interface to replace traditional photoelectric encoders, with a maximum resolution of 16384 pulses per cycle or 65536 steps per cycle for incremental output; At the same time, MT6835 also provides incremental UVW output with a resolution support of 1-16 pairs of poles per circle.
MT6835 provides a 4-wire SPI interface for the upper computer or MCU to read the 21 bit absolute angle value inside the chip. At the same time, PWM with single line output can also provide absolute angle data with a resolution of 12 bits.
The core performance improvement of MT6835 lies in providing a convenient self calibration mode for the client, which can compensate for various nonlinearities caused by imperfect magnets and structural installation deviations, thereby greatly enhancing the INL characteristics.



Features and advantages
Based on advanced AMR anisotropic magnetoresistance technology, (0~360 ° absolute angle position detection)
21 bit core angle resolution, supporting speeds up to 120000 revolutions per minute
Angle output delay of 2 microseconds to 10 microseconds
Provide automatic non-linear calibration mode for the client, without data interaction and automatic compensation calculation, achieving<± 0 INL of 0 7 ^ { circle}
-Can work within the temperature range of 40-125 ℃
Can simultaneously support incremental ABZ, incremental UVW, PWM absolute value, and 4-wire SPI bus output
Incremental ABZ output supports 1-16384 pulses per cycle, with any integer resolution that customers can program
Incremental UVW output supports 1 to 16 poles, any integer pole, customer programmable
Built in EEPROM that can be programmed from 3.3V to 5.0V



application
Absolute angle position sensor
DC brushless motor control
Servo motor control
Closed loop stepper motor control
Application of replacing some photoelectric encoders