Hall Effect Sensor - US1881

Our Price: CAD $2.40

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MFG Part #: SF-COM-09312
SPARKFUN
Estimated Weight:
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Availability:
Available for immediate shipping
*Lead times are approximate
Qty Breaks: 5-9 10+
Our Price: CAD $2.28 CAD $2.16
The US1881 is an integrated 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 threshold Bop, 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).
 
Features:
  • Input Voltage: 3.5V to 24V DC
  • Low current consumption
  • Temperature compensation
  • Wide operating voltage range
  • Open-Collector pre-driver
  • 50mA maximum sinking output current
  • Reverse polarity protection
  • Lead Free Package: TO-92