I am interested in using the hall-effect current sensor for my design, but I was curious about the noise that can be expected at the Vout pin. I am currently using a GO-10-SME/SP3 hall sensor from LEM and I was seeing significant noise at the output of my sensor (~0.45A). I found that the noise was coming from Uo pin (~27mV) and was getting amplified by my output op amp with a gain of 16.67 V/V giving me a total noise at the output of ~0.45A. When I asked LEM about this, they said this was a trade off of the hall sensor. They said the mechanism (chopping and dechopping stage in the image shown below) that is responsible for reducing error also creates broadband noise. The noise can easily be tamed with a large capacitor, but I feel the noise is too large even without a large capacitor.
I am curious if this can also be expected from your hall sensor. I have also attached a detailed power point if needed. Thank you so much.