Ultra-low-power omnipolar Hall switch for battery-operated position sensing
The Texas Instruments DRV5032FADMRR is a digital omnipolar Hall-effect switch that responds to either magnetic pole, with a ±4.8 mT typical operate point and ±0.5 mT release hysteresis. The open-drain or push-pull output (selected by the FA variant) interfaces directly to a GPIO without an external pull-up resistor, saving one BOM line per channel. The 5 mA max output current is sufficient to drive a logic input or a small LED indicator, but not a relay coil — plan a buffer for inductive loads.
Package and board-fit for space-constrained assemblies
Housed in a 4-pin XFDFN with exposed pad (1.1 mm × 1.4 mm X2SON footprint per the supplier device package), the DRV5032FADMRR sits in the same land pattern as other DRV5032 variants — a single PCB footprint covers the full sensitivity range. The magnetic operate point shifts with temperature (typically -0.06%/°C for the Hall element), so a 4.8 mT threshold at 25°C becomes roughly 4.4 mT at 85°C — account for this in the magnet air-gap budget if the assembly sees wide thermal swings.
Tape & Reel packaging (TR) is the standard production format; Cut Tape (CT) is available for prototyping.