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):
±40 mT
±80 mT
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 µA
Operating temperature: –40°C to +125°C
🔹 Communication Interface
Protocol: I2C (digital)
Max I2C speed: up to 1 MHz
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
🔹 Key Technical Features
True 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 sensing solution 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