Brian,
One challenge to add to this is that the referenced device is sensitive to the field which is in the X direction due to having been built with TMR. To truly be P2P with this device, our device would need to be sensitive to the field in this direction as well. Currently, we only offer TMAG5123 with this sensitivity direction in a SOT23-3 package.
This device samples at 10 kHz, but the highest sensitivity option (TMAG5123B) has a typical threshold at 4.1 mT (41 G). The temperature range matches, but operating supply current on this device is 3.5 mA, which is due to the difference in sample rate and sensor type (Hall vs. TMR). The other drawback is that the output type on this sensor is open-drain.
If the direction of sensitivity can be flexible, then TMAG5231C1G has a typical threshold at 3 mT, push-pull outputs, and samples at 216 Hz. The average current for this device is 16 uA.
Thanks,
Scott
