Other Parts Discussed in Thread: DRV5055
Tool/software:
I am working on a product (call it "A") that is using the DRV5056Z1QDBZR sensor, with Vcc=5V. The sensor senses a magnet in a mating product (call it "B"). When "B" is not mated, the sensor output is about 0.6V as expected. When "B" is mated the sensor output is about 0.9V, corresponding to about 1.5mT of flux density. Unfortunately, it turns out that the assembly SOP of "B" did not control for the magnet polarity. What I see is that when some units of "B" are mated, the sensor output is about 0.3V. I have not verified but I assume the flux density seen at the sensor for the reverse polarity units is "-1.5mT" (or 1.5mT in the "NORTH" polarity). I would like to be able to rely on the output voltage of any mated unit of "B" to be either 0.9V or 0.3V. I see that the datasheet for DRV5056Z1QDBZR says that any output below Vq~=0.6 results in non-linear behavior. This is fine as long as it is repeatable. I am hoping someone from TI can confirm the repeatability of DRV5056Z1QDBZR when there is a NORTH field present and Vout is about 0.3V.
I know that the DRV5055 offers bipolar linearity. However, the DRV5056Z1's sensitivity of 200mV/mT is important for this application. So, I would like to stick with the DRV5056Z1.
