Magn Tek MT6701CT-ACD

MT6701 is a next-generation angle position sensor IC based on the differential horizontal Hall magnetic sensing principle. The chip integrates two pairs of differential Hall Wheatstone bridges arranged at 90° to each other, which sense the Z-axis magnetic field component of a rotating magnet in the chip's X-Y plane. As the magnetic field angle α varies, two sinusoidal voltage signals are output, which are then amplified, compensated, and processed by dedicated internal circuitry to derive the angle value α.

MT6701 provides incremental ABZ output interface as a replacement for traditional optical encoders, with a maximum incremental output resolution of 1024 pulses/revolution or 4096 steps/revolution. It also provides incremental UVW signals as a replacement for Hall commutation switches, with programmable 1~16 pole pairs.

MT6701 supports standard I²C or SSI interfaces for reading the chip's internal 14-bit absolute angle value by a host controller or MCU. In addition, single-wire PWM or analog signal output provides absolute angle data with 12-bit resolution.

Furthermore, the PUSH pin can indicate rapid changes in the gap between the magnet and the chip, enabling contactless push-knob applications. Alternatively, pressing actions can be detected by reading the internal magnetic field strength value to determine distance variations of the magnet along the Z-axis.

MT6701 integrates an internal EEPROM; VDD voltage must be >4.5V during programming, and the parameters support repeated erase/write cycles.

• Hall-effect technology, 0~360° absolute angular position sensing
• 3.3V~5.0V supply voltage, built-in EEPROM (VDD>4.5V required during programming)
• Independent output interfaces: I²C, SSI, ABZ, UVW, analog voltage, PWM, and Z-axis push detection
• Maximum speed up to 55,000 RPM
• Angular output system latency <5μs
• Incremental ABZ output: 1~1024 pulses/revolution, customer-programmable arbitrary integer resolution
• Incremental UVW output: 1~16 pole pairs, customer-programmable arbitrary integer pole pairs
• Excellent stray magnetic field immunity
• RoHS 2011/65/EU compliant
• SOP-8 and QFN3x3-16L packages

• Absolute angular position sensor
• Closed-loop stepper, BLDC control
• Robotic joint control
• Non-contact knob, button
• Non-contact potentiometer