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Adafruit TMAG5273 (A1) 3D Hall Effect Magnetometer Breakout - ±40mT, ±80mT - STEMMA QT
The Adafruit TMAG5273 (A1) 3D Hall Effect Magnetometer Breakout is a low-power linear 3D Hall-effect sensor designed for a wide range of industrial and personal electronics applications. It integrates three independent Hall-effect magnetometer sensors in the X, Y, and Z axes for full 3D orientation detection. The built-in 12-bit ADC can read the signal from each axis for read-out over I2C, it even has a thermometer built in for basic temperature reading!
An integrated angle calculation engine (CORDIC) provides full 360° angular position information for both on-axis and off-axis angle measurements. The angle calculation is performed using two user-selected magnetic axes over I2C. The TMAG also features magnetic gain and offset correction - note you'll have to manage the values and write them into the chip on boot-up.
3D Hall effect sensors are great for sensing rotation or motion of an object nearby with a magnet embedded inside: often used for magnetic rotary encoders or joysticks that don't have mechanical switches and thus are more reliable and don't fail from wear.
This sensor comes in two flavors, the A1 type is ±40mT / ±80mT range (you can pick either range), and the A2 has a wider ±133mT / ±266mT range. Both use the exact same firmware and pinout - the firmware we've written can detect which one you have plugged in and automatically scale the readings as necessary. This isn't a great sensor for measuring the magnetic field of the earth, much better for magnets of the ferric or rare-earth persuasion.
User Manual / Datasheet / Example Codes Etc.
Specifications
- Configurable power modes including:
- 2.3mA active mode current
- 1µA wake-up and sleep mode current
- 5nA sleep mode current
- Selectable linear magnetic range at X, Y, or Z axis:
- TMAG5273x1: ±40mT, ±80mT
- Interrupt signal from user-defined magnetic and temperature threshold cross
- 5% (typical) sensitivity drift
- Integrated angle CORDIC calculation with gain and offset adjustment
- 20kSPS single axis conversion rate
- Configurable averaging up to 32x for noise reduction
- Conversion trigger by I2C or dedicated INT pin
- Optimized I2C interface with cyclic redundancy check (CRC):
- Maximum 1-MHz I2C clock speed
- Special I2C frame reads for improved throughput
- Factory-programmed and user-configurable I2C addresses (must be re-written on every reset)
- Integrated temperature compensation for multiple magnet types
- Built-in temperature sensor
- Product Dimensions: 25.3mm x 17.7mm x 4.6mm / 1.0" x 0.7" x 0.2"
- Product Weight: 1.7g / 0.1oz
Package Includes
- 1x Adafruit TMAG5273 (A1) 3D Hall Effect Magnetometer Breakout - ±40mT, ±80mT - STEMMA QT
