The Timken Multiplying Encoder ASIC, or MPS160, combines a direction-sensing Hall effect encoder with an integrated index pulse and a high accuracy resolution speed and position sensor system, all on one compact chip. The ASIC produces and processes Hall effect signals to create high-resolution quadrature output signals at speeds up to 250 k Hz/channel and offers a low power mode operation for lower speed applications.
The robust design operates reliably at higher temperatures, shock loads and vibration levels, and is more tolerant of sensor-to-target variations (up to 2mm air gap) than competing solutions. And, it's not as vulnerable to particulate, liquid or solid contaminates between the sensor and magnetic target.
The encoder ASIC offers flexibility for motor control circuitry in its ability to interface with external Hall sensors for commutation. When used with the external commutation Hall devices, it provides absolute position over SPI interface.
When used with special magnetized targets, a digital index signal is output by the chip and synchronized with the high resolution circuit signal.
As a multiplying encoder, the programmable output signal is up to 160 times the resolution of the pole pair count on the sensor’s multi-pole magnetic target. This creates the high decimal or binary resolution normally associated with optical encoders.
Design Attributes
- Complete system packaged in a compact 8mm x 6 mm chip.
- Fully integrated on-chip Hall sensor generates digital high resolution and synchronized index pulse signals.
- Design provides high shock and vibration resistance and high temperature operating capabilities.
- Operable even with liquid or solid particulate in the gap between the sensor and target.
- True zero-speed operation.
- High resolution with large air gaps.
- Absolute position capability when used with external or commutation Hall devices.
- SPI diagnostics for air gap and internal errors.
- Low power mode for low speed applications.
- Uses polymer bonded multi-pole magnets as rotary or linear targets.
- Index pulse and temperature outputs available.
- EMI resistant.
- Available as individual ASICS or as part of integrated assemblies.
Applications
- Encoders
- Brushless DC motors
- Rotary and linear positioning
- General purpose motion control
- Automotive electric power assisted steering
- AC and DC motor internal speed control
- Motion control and sensing in industrial equipment
- Electric motor feedback in automotive accessories
- E-Pass applications for automotive
Case Studies
Sensor Technology Provides Breakthrough Performance for Bobcat
Timken technologies contribute to all-wheel steering capabilities for skid-steer loaders and utility work machines.