Three-axis linear Hall-effect sensor with I²C and programmable switch in wafer chip-scale package

The TMAG3001 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, allows seamless data communication with low-voltage microcontrollers.

The TMAG3001 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 their 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. The device also features a configurable low

power switch mode for magnetic or angle measurements.

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 TMAG3001 features an ADDR pin

that can be used to have four different I2C addresses. Each orderable

part can be configured to select one of two magnetic field ranges that corresponds

to 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.