2 Overview

The TMAG5124 is a family of 2-wire Hall Effect sensors designed for system challenges where current is needed as an operating signal in place of voltage. This is most commonly found in applications where the Hall sensor is located some distance from the microcontroller or processor that acts on the signal, and signal integrity is of concern.

When the applied magnetic flux density exceeds the magnetic operating point (B_OP) threshold, the device output drives into a high or low current state, based on the device in use. When the magnetic flux density returns to a value below the magnetic release point (B_RP), the device output returns itself into a high or low current state, based on the device in use. Table 2-1 lists device options.

This evaluation module is populated with four Z-axis oriented, north pole sensitive, active low devices. Each device exhibits a different sensitivity, allowing each of the sensitivities to be tested for use in an application. These devices produce an active low signal of 5 mA – 6.9 mA when the B_OP threshold is crossed, and a high signal of 12 mA – 15 mA when no magnet is present.

The device operates from a VCC range of 2.5V to 38V, and is available in a standard SOT-23 package.