iC-MHM

iC-MHM: 14-bit Magnetic BiSS/SSI Encoder iC with Multiturn Interface.

iC-MHM is an absolute angle encoder, with a single-chip integrating Hall sensors, high resolution real-time sine-to-digital conversion, serial interface, multiturn interface as well as RS422 and LVDS transceivers, all integrated in a 5x5 mm QFN28 package. The main features of iC-MHM are:

• 14-bit sine-to-digital conversion (0.02° angular resolution per 360° revolution)

• Integrated RS422 transceivers for BiSS/SSI communication up to 10 MHz

• Analog Sin/Cos 1 Vpp differential output

• Up to 46-bit resolution (32-bit multiturn + 14-bit singleturn)

• Error signalling

iC-MHM can operate safely at 80,000 RPM with 12-bit singleturn resolution, and includes safety features like CRC proof output (up to 16-bit CRC), lifecounter and error messages in case of hall sensor errors, multiturn synchronisation problems, etc. The iC operated with 4.5 to 5.5 V power supply at a temperature range from -40 to +125 °C. The iC configuration data can be loaded from an EEPROM or through a microcontroller with SPI interface.