How to get analog reading from an A3144 Hall sensor?

Question

I once had a Joy-IT KY-024 sensor board that uses the A3141 Hall sensor to output analog and digital signals. I lost that sensor and then bought the Joy-IT KY-003 because I don't need the digital output anyways and the whole board is smaller. The KY-003 uses the A3144 which, according to the data sheet, only has a different trigger point.

The four basic devices (3141, 3142, 3143, and 3144) are identical except for magnetic switch points.

But with the KY-003 I only get an digital output which confuses me because the KY-024 has an analog output that according to the data sheet is a

Direct measurement of the sensor unit

Even if this wouldn't be true, the only components on that board are some resistors and a comparator.

So how can I get an analog reading from the A3144, if it is possible at all?

Answer 1

You can’t modify the switch to become analog, so get the right part. But if you were to apply a coil with a triangular current of +/- 50 gauss at say 1kHz on the sensor...then. You might get a PWM output that may be LPF’d to create an analog signal.

So get the right part. You can’t make a pig “moo”.