Low-power linear 3D Hall-effect sensor with I²C interface

The TMAG5273 is a

low-power linear 3D Hall-effect sensor designed for a wide range of industrial and

personal electronics applications. This device integrates three independent

Hall-effect sensors in the X, Y, and Z axes. A precision analog signal-chain along

with an integrated 12-bit ADC digitizes the measured analog magnetic field values.

The I2C interface, while supporting multiple operating VCC

ranges, provides seamless data communication with low-voltage microcontrollers. The

device has an integrated temperature sensor available for multiple system functions,

such as thermal budget check or temperature compensation calculation for a given

magnetic field.

The TMAG5273 can be

configured through the I2C interface to enable any combination of

magnetic axes and temperature measurements. Additionally, the device can be

configured to various power options (including wake-up and sleep mode) allowing

designers to optimize system power consumption based on system-level needs. Multiple

sensor conversion schemes and I2C read frames help optimize throughput

and accuracy. A dedicated INT pin can act as a system interrupt

during low power wake-up and sleep mode, and can also be used by a microcontroller

to trigger a new sensor conversion.

An integrated angle calculation engine

(CORDIC) provides full 360° angular position information for both 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 TMAG5273 is

offered in four different factory-programmed I2C addresses. The device

also supports additional I2C addresses through the modification of a

user-configurable I2C address register. Each orderable part can be

configured to select one of two magnetic field ranges that suits the magnet strength

and component placement during system calibration.

The device performs consistently

across a wide ambient temperature range of –40°C to +125°C.