Adafruit
Adafruit TMAG5273 A2 3D Hall Effect Magnetometer Breakout
· MPN: ADA6490
This breakout carries the TMAG5273 A2, a low-power linear 3D Hall-effect sensor for measuring magnetic fields across the X, Y and Z axes. Its built-in 12-bit...
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This breakout carries the TMAG5273 A2, a low-power linear 3D Hall-effect sensor for measuring magnetic fields across the X, Y and Z axes. Its built-in 12-bit ADC provides axis readings over I2C, and there is also an integrated thermometer for basic temperature measurement.
The sensor includes an angle calculation engine (CORDIC) for full 360° angular position information, using two user-selected magnetic axes over I2C. It is well suited to rotation and motion sensing with an embedded magnet, such as magnetic rotary encoders and joysticks without mechanical switches.
Adafruit has added the support circuitry needed for use with 3.3V boards such as Feather and Raspberry Pi, or 5V boards such as Arduino and Metro328. STEMMA QT connectors make solder-free I2C wiring possible with compatible cables, while the standard header is included for breadboard or perfboard use.
The board is fully assembled and tested, with CircuitPython/Python and Arduino drivers available for getting magnetic measurements quickly. Four 2.5mm (0.1") mounting holes are included for easy attachment.
Specifications:
- Configurable power modes: including
- Active mode current: 2.3mA
- Wake-up and sleep mode current: 1µA
- Sleep mode current: 5nA
- Selectable linear magnetic range at X, Y, or Z axis: selectable
- TMAG5273x1: ±40mT, ±80mT
- TMAG5273x2: ±133mT, ±266mT
- Interrupt signal: from user-defined magnetic and temperature threshold cross
- Sensitivity drift: 5% (typical)
- Angle calculation: Integrated angle CORDIC calculation with gain and offset adjustment
- Single axis conversion rate: 20kSPS
- Averaging: Configurable averaging up to 32x for noise reduction
- Conversion trigger: by I2C or dedicated INT pin
- I2C interface: Optimized I2C interface with cyclic redundancy check (CRC)
- Maximum I2C clock speed: Maximum 1-MHz I2C clock speed
- I2C frame reads: Special I2C frame reads for improved throughput
- I2C addresses: Factory-programmed and user-configurable I2C addresses (must be re-written on every reset)
- Temperature compensation: Integrated temperature compensation for multiple magnet types
- Temperature sensor: Built-in temperature sensor
- Product Dimensions: 25.5mm x 17.7mm x 4.6mm / 1.0" x 0.7" x 0.2"
- Product Weight: 1.7g / 0.1oz
This A2 version is intended for stronger ferric or rare-earth magnets, rather than measuring the Earth’s magnetic field.
Jargon buster
Plain-language definitions for the technical terms used above.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- CircuitPython
- A beginner-friendly version of Python designed to run directly on microcontroller boards. If a product supports CircuitPython, you can often program it by copying code files onto the board rather than setting up a more complex toolchain.
- Hall-effect sensor
- A magnetic sensor that changes its output when it detects a magnetic field. It matters for projects that need to sense magnets, wheel rotation, position, or current without physical contact.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- STEMMA QT
- A small plug-in connector system for I2C boards that lets you connect compatible sensors and controllers without soldering. It matters because it can make wiring faster and less error-prone, especially when adding several small modules to a project.
- Temperature compensation
- Temperature compensation means the sensor adjusts its readings to reduce errors caused by changes in water temperature. This matters for field monitoring because ponds, rivers, and tanks can vary in temperature throughout the day and across seasons.
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Sensors & Input
Supplier page — adafruit.com
Supplier Description · 1.2 MB · Click any page to view full size
TMAG5273 Breakout Guide PDF
User Guide · 1.7 MB · Click any page to view full size
