Description | |
The TMR3109 is a contactless, high-precision, and high-speed magnetic rotary encoder sensor, which integrated with tunneling magnetoresistance (TMR) sensors and CMOS digital signal processing circuitry. The TMR3109 senses the single pole-pair magnet rotation above the chip by TMR sensors, collects the rotating magnetic field signal, transmits it to the digital processing unit, and calculates the rotation angle. The TMR3109 supports 3-wire and 4-wire SPI working modes, allowing the client MCU to read 23-bit absolute position information through the SPI protocol. Auto-calibration is available for the TMR3109 to compensate non-linearities caused by imperfect installation. |  SOP8 |
Features and Benefits | |
 Tunneling magnetoresistance (TMR) technology | Supply voltage: 3.3 V to 5 V |
| Supports 0° to 360° absolute angle detection | Supply current: 10 mA (typical) |
| On and off axis measurements | Available in SPI interface |
| Angular output delay < 2 μs | Angular repeatability < ±0.05° |
| Speeds up to 40,000 RPM | Auto-calibration function |
| Integrated automatic gain calibration function | RoHS and REACH compliant |
Applications | |
| Contactless angular position measurement | Brushless motor position sensing |
| Rotary speed sensing | Close loop stepper system |
| Servo encoder | |
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