TMAG5124

GND

0.1 …F

Vcc

ECU

VCC

GND

TEST

0.1 …F

Vcc

GND

TMAG5124

ECU

TEST

VCC

GND

13

TMAG5124

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SLYS016 – JUNE 2020

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9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

The TMAG5124 is typically used in magnetic-field sensing applications to detect the proximity of a magnet. The

magnet is often attached to a movable component in the system.

The TMAG5124 is a Hall sensor that uses current as the signal of interest. Unlike voltage signals, current signals

are much more robust for common problems voltages face in electrical systems, such as voltage source

fluctuations and source impedance. A major factor that often leads to the choice of a current signal device is

immunity to loop impedance, meaning that the signal is capable of being transmitted long distances with ease,

simply requiring a termination resistor at the end of the path for interfacing the reconstructed voltage to an input,

such as a comparator. Also, diagnostic tools are easily implemented, as disconnects in the loop are easily

detected due to a lack of signal.

9.2 Typical Applications

9.2.1 High-Side and Low-Side Typical Application Diagrams

Figure 19. Typical High-Side Sensing Diagram

Figure 20. Typical Low-Side Sensing Diagram