iC-Haus iC-MH8 Fast, Universal 12-bit Encoder IC for BLDC Motor Control

iC-MH8 is a large-scale integrated systems solution for magnetic sensor applications in fast motor control units. Combined with a diametrically magnetized permanent magnet, the tiny device (QFN28 5x5 package) can be used to create a robust, universal encoder for motor commutation and positioning. The chip includes a Hall sensor array with signal amplification control, two interpolators for incremental (ABZ, 12-bit) and commutation (UVW) signals, differential sine/cosine outputs (1 Vpp to 100 Ω), integrated RS422 line drivers, and a serial SSI/BiSS interface.

iC-MH8 is typically used in industrial, automotive, and medical applications, such as:

• As substitute resolvers or optical absolute encoders.
• As universal absolute encoders (with sine/cosine and SSI/BiSS options)
• Absolute detection/measurement of angles of rotation
• Speed control of up to 120,000 rpm at a 12-bit resolution
• Fast position control in robots with safety requirements
• Fast motor control with short sensor latencies

The angle resolution can be programmed in up to 4,096 steps per revolution. With an ABZ incremental signal output edge rate of 8 MHz, speeds of up to 120,000 rpm can be recorded. 360,000 rpm can be obtained with a resolution of 10 bits. 

UVW commutation is available for 2-pole, 4-pole, or 8-pole DC motors. For safety applications the differential sine/cosine outputs provide redundant capture and transmission of the angle position at 1 Vpp to 100 Ω. The sine/cosine, ABZ, and UVW outputs have been implemented as configurable RS422 line drivers, enabling the device to be perfectly adapted to suit various line lengths and transmission rates.

For additional iC-Haus product information or technical support, contact Symmetry Electronics, an authorized distributor of industry leading wireless, audio/video and embedded chips, modules and dev/eval tools. www.symmetryelectronics.com/contact or call (877) 466-9722.