1 Overview
The TMAG5328 is a resistor-adjustable device where the internal magnetic threshold sensitivity (B
OP
) varies
with the value of the external resistor connected to the “ADJ” pin of the device. When the applied magnetic flux
density exceeds the B
OP
threshold, the device outputs a low voltage. The output stays low until the flux density
decreases to less than the release point (B
RP
), then the output drives a high voltage. The B
OP
is selectable to be
anywhere between the 2-mT to 15-mT range. This device allows designing a platform of systems with multiple
sensitives with only one Hall sensor, thereby reducing device inventory management and facilitating prototyping
by enabling B
OP
adjustment after assembly. As an alternative to setting the B
OP
directly with a resistor, the B
OP
can also be set by directly applying a voltage on the ADJ pin, assuming that the voltage source can properly sink
the current generated internally on the ADJ pin.
The TMAG5328EVM is an easy-to-use platform for evaluating the performance of the TMAG5328. This EVM
supports adjusting the B
OP
using four options: a fixed resistor, a potentiometer for creating an adjustable
resistance, the DAC43701 DAC for creating an adjustable voltage, or an external voltage source.
shows the EVM.
Figure 1-1. TMAG5328 Evaluation Module
The EVM is intended to provide basic functional evaluation of the devices. The layout is not intended to be a
model for the target circuit, nor is it laid out for electromagnetic compatibility (EMC) testing. The EVM consists of
two PCBs. The smaller PCB is referred to as the EVM, and has the TMAG5328 device installed. The larger PCB
is referred to as the Sensor Control Board (SCB), and is used to interface the EVM with the GUI.
Overview
2
TMAG5328 Evaluation Module
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