New 3D Hall-Effect Position Sensor with SPI Bus Interface provides Ultra-High Precision for Faster Real-Time Control

Published  October 13, 2021   0
TMAG5170 3D Hall Effect Sensor from Texas Instruments

Texas Instruments has introduced new 3D Hall-effect position sensor TMAG5170 that provides integrated functions and diagnostics to maximize design flexibility and system safety, while using at least 70% less power than comparable devices. With the new TMAG5170 sensor, engineers can achieve uncalibrated ultra-high precision at speeds up to 20 kSPS for faster and more accurate real-time control in factory automation and motor-drive applications. Moreover, this device increases safety with a unique set of smart diagnostic capabilities such as checks for communication, continuity and internal signal path along with configurable diagnostics for the external power supply, magnetic field and system temperature.

This new 3D Hall-effect position sensor features drift of 3% total error which enable the device to deliver higher accuracy, eliminating the need for end-of-line calibration and off-chip error compensation. The sensor’s integrated computation functions also reduce the system’s processor load by as much as 25%, enabling engineers to use general-purpose microcontrollers.

Key Features of TMAG5170 Sensor

  • 10-MHz serial peripheral interface (SPI) with cyclic redundancy check (CRC)
  • Built-in temperature sensor with < ±2°C error
  • Independently selectable X, Y, and Z magnetic ranges
  • 5-nA (typical) deep sleep mode current
  • Autonomous wake-up and sleep mode for threshold detection consuming only 1.5 µA
  • ALERT function to initiate sensor conversion or indicate conversion complete
  • Integrated diagnostics for fault detection
  • Integrated angle CORDIC calculation with gain and offset adjustment
  • 2.3-V to 5.5-V supply voltage range
  • Operating temperature range: –40°C to +150°C

The TMAG5170 sensor is now available from in an eight-pin, 4.9-mm-by-3-mm very thin shrink small-outline package and pricing starts at US$1.139 in 1,000-unit quantities.