A3144 Hall Sensor On Breakout Board. 4,5V To 24V Operation. 25MA Open-collector Output
The A3144 is an Hall effect latched sensor. That's nice but what does it do? 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 the threshold, DO is turned on (low). The output state is held until a magnetic flux density reversal falls below Brp causing DO to be turned off (high).
- Superior temperature resilience. Suitable for automotive or industrial applications
- 4.5 V to 24 V Operation
- Open-Collector 25mA output
- Reverse battery protection
- Activate with small, commercially available permanent magnets
- Solid-State reliability
- Small size
- Resistant to physical stress
The Hall Magnetic Sensor consists of a 3144EUA-S sensitive Hall-effect switch for high-temperature operation, a 680O resistor and a LED. Compatible with popular electronics platforms like Arduino and Raspberry Pi.