Design a low power circuit to detect an spinning magnet using a hall effect sensor

I need to detect the number of rotations of a spinning magnet. I have measured the magnetic field strength oscillating around += 0.9 Gauss (see attachment). Most hall effect sensors with built in amplifiers and comparators don't have operating points in this range so I need to design one using an analog output hall effect sensor and op amp. However, I'm open to other design suggestions.

Requirements:
- Digital output indicating a rotation of the magnet
- Low power (~50 uA @ 3.3v)
- Minimal part count
- Low cost part selection
- SPICE simulation or some kind of verification of design

Example design:

Analog hall sensor (e.g. DRV5053) -> Amplifier -> Comparator with hysteresis (e.g. TLV320x) -> Digital output