Fully-integrated precision fluxgate magnetic field sensor

This post is sponsored by Texas Instruments. The Texas Instruments (TI) DRV425 is designed for single-axis magnetic field-sensing applications and enables electrically-isolated, high-sensitivity, and precise DC- and AC-field measurements. The device provides the company's proprietary, integrated fluxgate sensor (IFG) with an internal compensation coil to support a high-accuracy sensing range of ±2mT with a measurement bandwidth of up to 47kHz. The low offset, offset drift, and noise of the sensor, combined with the precise gain, low gain drift, and very low nonlinearity provided by the internal compensation coil, result in unrivalled magnetic field measurement precision, says the company. The output of the DRV425 is an analog signal proportional to the sensed magnetic field. The device offers a complete set of features, including an internal difference amplifier, on-chip precision reference, and diagnostic functions to minimize component count and system-level cost. The DRV425 is available in a thermally-enhanced, non-magnetic, thin WQFN package with a PowerPAD for optimized heat dissipation, and is specified for operation over the extended industrial temperature range of –40C to +125C.