- The A3144 is an integrated Hall effect non-latching sensor.
- Holding a magnet near the sensor will cause the output pin to toggle.
- This makes for a robust presence sensor. A reed sensor also works nicely, but can be limited by the glass encapsulation and size.
- A hall effect sensor is much smaller, but can handle less current than a reed switch.
- The device includes an on-chip Hall voltage generator for magnetic sensing, a comparator that amplifies the Hall voltage, and a Schmitt trigger to provide switching hysteresis for noise rejection, and open-collector output.
- An internal bandgap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range.
- If a magnetic flux density larger than threshold Bop, the output is turned on (low). The output state is held until a magnetic flux density reversal falls below Brp causing the output to be turned off (high)
- Superior Temp. Stability for Automotive or Industrial Applications
- 4.5 V to 24 V operation, works with most unregulated supplies
- Open-Collector 25 mA output, compatible with digital logic
- Reverse Battery Protection
- Activate with Small, Commercially Available Permanent Magnets
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