The MT6521 is a new generation of magnetic angle and position detection sensor chip based on the principle of horizontal Hall and Magnetic Concentrate (IMC) technology launched by MagnTek Microelectronics. The chip contains two pairs of horizontal Hall arrays and concentrator sheets placed at 90° to each other, which can realize the magnetic field change detection of XY, XZ and YZ planes according to different model configurations, and output two voltage signals of sine and cosine, and then obtain the angle value (α) after amplification, compensation and calculation of subsequent special circuits.
The MT6521's OUT output pin provides programmable choice of analog, PWM, and SENT outputs. In addition, these three outputs can be programmed to any 8-point or 17-point (16-segment) equal parts of the output curve.
The MT6521 also provides two communication interfaces, output single-wire (OWI) and 3-wire SPI, allowing users to read 16-bit absolute angular data and read and write other internal registers. Users can also use SPI and OWI interfaces to program the EEPROM inside the chip.
For some special applications, the MT6521 also provides a separate switching output (SWO) in an angular position, and the parameters of the switching point and switching hysteresis window are user-programmable.
As a chip mainly for automotive applications, the MT6521 is designed with a series of functional safety mechanisms such as self-test and diagnosis, which can support the functional safety requirements of single-channel chip ASIL-B and dual-channel chip ASIL-B (D).
