A1421
Overview
The A1421, A1422, and A1423 are AC-coupled Hall-effect sensor ICs which include monolithic integrated circuits that switch in response to changing differential magnetic fields created by rotating ring magnets or, when coupled with a magnet, by ferrous targets. This family of devices also includes an integrated capacitor that provides the high accuracy of analog sensing without an external filter capacitor.
- Integrated tracking capacitor
- Used for sensing motion of ring magnet or ferrous targets
- Wide operating temperature range
- Operation with magnetic input signal frequency from 20 Hz to 30 kHz
- EMI/ESD-resistant
- Large effective air gaps
- 4.0 to 26.5 V supply operating range
- Output compatible with CMOS logic families
- Reverse battery protection
- Resistant to mechanical and thermal stress
