TMAG517x High-Precision Linear 3D Hall Effect Sensor with SPI Bus Interface

Texas Instruments' highly integrated sensor offers flexibility and accuracy for a variety of position sensing systems

Image of Texas Instruments' TMAG517x High-Precision Linear 3D Hall-Effect SensorTexas Instruments' TMAG5170 is a high-precision linear 3D Hall effect sensor designed for a wide range of industrial and personal electronics applications. The high level of integration offers flexibility and accuracy in a variety of position sensing systems. This device features three independent Hall sensors at the X, Y, and Z axes. A precision signal chain along with an integrated 12-bit ADC enables high-accuracy and low-drift magnetic field measurements while supporting a sampling of up to 20 ksps. On-chip temperature sensor data is available for system-level drift compensation.

The integrated angle calculation engine (CORDIC) provides full 360° angular position information for the on-axis and off-axis angle measurement topologies. The angle calculation is performed using two user-selected magnetic axes. The device features magnetic gain and offset correction to mitigate the impact of system mechanical error sources. The TMAG5170 can be configured through the serial peripheral interface (SPI) to enable any combination of magnetic axes and temperature measurements. There are multiple sensor conversion schemes and SPI read frames to optimize throughput and accuracy. A dedicated ALERT pin can act as a system interrupt during low power wake-up and sleep mode and can be used by a microcontroller to trigger a new sensor conversion.

The TMAG5170 offers multiple diagnostics features to detect and report system and device-level failures. The SPI communication features a user-enabled cyclic redundancy check to enhance the data integrity. The device is offered in two different versions to support wide magnetic fields range from ±25 mT to ±300 mT. The sensor offers an ambient temperature range of -40°C to +150°C.

Features
  • High-precision linear 3D Hall effect sensor to optimize position sensing speed and accuracy:
    • Linear measurement total error: ±2.6% (max. at +25°C)
    • Sensitivity temperature drift: ±2.8% (max.)
    • Conversion rate: 20 ksps for single axis
  • 10 MHz SPI with cyclic redundancy check (CRC)
  • Built-in temperature sensor with <±2°C error
  • Independently selectable X, Y, and Z magnetic ranges:
    • TMAG5170A1: ±25 mT, ±50 mT, and ±100 mT
    • TMAG5170A2: ±75 mT, ±150 mT, and ±300 mT
  • Deep sleep mode current: 5 nA (typ.)
  • Autonomous wakeup and sleep mode for threshold detection consuming 1.5 µA
  • ALERT function to initiate sensor conversion or indicate conversion completion
  • Integrated diagnostics for fault detection
  • Integrated angle CORDIC calculation with gain and offset adjustment
  • Supply voltage range: 2.3 V to 5.5 V
  • Operating temperature range: -40°C to +150°C
Applications
  • Robotic-arm sensors
  • Mobile robot motor controls
  • Proximity sensors
  • Linear motor position sensors
  • Servo drive position sensors
  • Actuators
  • Robotic lawnmowers
  • Vacuum robots
  • Washers and dryers
  • Door and window sensors

TMAG517x High-Precision Linear 3D Hall-Effect Sensors

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
AUTOMOTIVE, HIGH-PRECISION, LINETMAG5170A2EDGKRQ1AUTOMOTIVE, HIGH-PRECISION, LINE0View Details
AUTOMOTIVE, HIGH-PRECISION, LINETMAG5170A1EDGKRQ1AUTOMOTIVE, HIGH-PRECISION, LINE0View Details
HIGH-PRECISION, 3D LINEAR HALL-ETMAG5170A1QDGKRHIGH-PRECISION, 3D LINEAR HALL-E0View Details
HIGH-PRECISION, 3D LINEAR HALL-ETMAG5170A1QDGKTHIGH-PRECISION, 3D LINEAR HALL-E0View Details
HIGH-PRECISION, LINEAR 3D HALL-ETMAG5170A2QDGKTHIGH-PRECISION, LINEAR 3D HALL-E0View Details
HIGH-PRECISION, LINEAR 3D HALL-ETMAG5170A2QDGKRHIGH-PRECISION, LINEAR 3D HALL-E0View Details

Evaluation Board

ImageManufacturer Part NumberDescriptionSensor TypeSensing RangeInterfaceAvailable QuantityView Details
EVAL BOARD FOR TMAG5170TMAG5170UEVMEVAL BOARD FOR TMAG5170Hall Effect±25mT, ±50mT, ±75mT, ±100mT, ±150mT, ±300mTSPI17 - ImmediateView Details
Published: 2022-02-22