7Semi TMAG5273 4Pin 3D Hall-effect Sensor Breakout Module

Overview

The 7Semi TMAG5273 4-Pin Breakout Module is a high-precision 3D Hall-effect magnetic sensor based on the TMAG5273 IC from Texas Instruments.

• Measures magnetic field in X, Y, and Z axes

• Provides digital output via I2C

• Designed for position sensing, angle measurement, and magnetic field detection

Working Principle

• Uses Hall-effect sensing to detect magnetic fields

• Measures flux density in three axes (Bx, By, Bz)

• Internal ADC converts signals digital data output

• Built-in processing computes:

  • Magnetic magnitude

  • Angle (via internal CORDIC engine)

   

Measurement Characteristics

• Axes: 3-axis (X, Y, Z)

• Magnetic Range (Selectable):

Some variants support extended ranges:

• 133 mT / 266 mT

Sensitivity:

• 820 LSB/mT (40 mT mode)

• 410 LSB/mT (80 mT mode)

Accuracy & Performance

• Angular accuracy: ~0.5

• Magnetic drift: ~5% typical

• Sampling rate: up to ~20 kSPS (single-axis)

• Supports averaging (up to 32x) for noise reduction

Electrical Characteristics

• Operating voltage: ~1.7V to 3.6V

• Typical supply (breakout): 3.3V

• Power consumption:

  • Active: ~2.3 mA

  • Sleep: ~1 A

• Operating temperature: 40C to +125C

Communication Interface

• Protocol: I2C (digitastrong>Default I2C address: 0x35 (configurable)

Pin Configuration (4-Pin Version)

Typical 4-pin connector includes:

• VCC Power supply

• GND Ground

• SCL I2C clock

• SDA I2C data

(Some advanced boards may also expose INT/Enable pins separately)

Internal Features

• Integrated CORDIC engine (angle calculation)

• Built-in temperature sensor & compensation

• CRC support for reliable communication

• Configurable:

  • Data rate

  • Threshold interrupts

  • Gain and offset

   

Functional Capabilities

• Magnetic field vector measurement

• Angle and rotation detection

• Magnetic proximity sensing

• Threshold-based interrupt triggering

g>3D magnetic sensing (X, Y, Z)

High precision with digital output Built-in angle computation (no external math required) Ultra-low power modes High-speed I2C communication Noise reduction via averaging

Functional Behavior

• Continuously measures magnetic field in 3 axes

• Outputs:

  • Raw magnetic data

  • Calculated angle (if configured)

   

• Can generate interrupts when:

  • Magnetic threshold exceeded

  • Temperature condition met

   

Limitations

• Requires external magnet for operation

• Accuracy depends on:

  • Magnet alignment

  • Distance from sensor

   

• Sensitive to external magnetic interference

• Needs calibration for precise angle measurements

Technical Summary

This module is a high-end magnetic s compared to basic Hall sensors because it:

• Measures 3-axis magnetic fields (not just presence)

• Provides digital, processed output

• Includes built-in angle calculation hardware

• Offers high speed + low power operation