The DRV5057-Q1 is a linear Hall effect sensor that responds
proportionally to magnetic flux density. The device can be used for accurate position sensing in a
wide range of applications.
The device operates from 3.3-V or 5-V power supplies. When no magnetic field is present,
the output produces a clock with a 50% duty cycle. The output duty cycle changes linearly with the
applied magnetic flux density, and four sensitivity options maximize the output dynamic range based
on the required sensing range. North and south magnetic poles produce unique outputs. The typical
pulse-width modulation (PWM) carrier frequency is 2 kHz.
Magnetic flux perpendicular to the top of the package is sensed, and the two package
options provide different sensing directions.
Because the PWM signal is based on edge-to-edge timing, signal integrity is maintained
in the presence of voltage noise or ground potential mismatch. This signal is suitable for distance
transmission in noisy environments, and the always-present clock allows the system controller to
confirm there are good interconnects. Additionally, the device features magnet temperature
compensation to counteract how magnets drift for linear performance across a wide –40°C to
+150°C temperature range.