China Hall Effect Sensor AH443 Hall Switch Hall IC Hall Sensor Speedometer Water Meter Liquid Level Sensor

 Features
Rated working voltage 4.5 V ~ 24 V, the limit voltages as low as 3.5 V;
Operating temperature range: -40ºC ~ 150ºC;
 Rated output current(sink) : 25 mA, the maximum output current(sink): 50 mA
Switch response time is about 1μs, the operating frequency DC ~ 100 kHz;
Small temperature drift between operating point and release point;
There are variety of packages and out packing options;
No mechanical contact, no spark, switch signal stability, no shaking moment, high reliability and safety;
Products meet the EU RoHS instruction 2011/65 / EU and REACH regulations 1907/2006 / EU requirements

AH443
Hall-effect switch integrated circuits
These Hall-effect switches are monolithic integrated circuits with tighter magnetic specifications and highsensitivity, designed to operate continuously over extended temperatures to +150° And are more stable withC, both temperature and supply voltage changes. The unipolar switching characteristic makes these devices ideal foruse with a simple bar or rod magnet.
Each device includes a voltage regulator for operation with supply voltages of 4.5 to 24 volts, reverse batteryprotection diode, quadratic Hall-voltage generator, temperature compensation circuitry, small-signal amplifier, Schmitt trigger, and an open-collector output to sink up to 25 mA. With suitable output pull up, they can be usedwith bipolar or CMOS logic circuits.
 
 When the "S" pole of magnet faces the mark surface of the sensor and is closed to sensor (B≥Bop),the sensor outputs low level; When magnet is far away from sensor(B≤ BRP), the sensor outputs high level. When the "N" pole faces the mark surface,the sensor is no response. Stable Hyteresis((BH= |BOP- BRP|)ensure the Stable sensor's switch status. The magnet and electric transfer characteristic curve is shown as the figure:

  Hall sensor AH443 is one of unipolar excitation single-ended digital output Hall IC.  The sensor chip has built-in reverse voltage protection, voltage regulators, temperature compensation circuit, Hall-voltage generator, signal amplifier, Schmitt trigger and open collector output driver circuit unit. Excellent voltage regulator and temperature compensation circuit ensure the sensor stable operates over a wide voltage range and temperature range, and the reverse voltage protection circuit avoids the sensor to be damaged by reverse voltage.
Operating Condition  
Electrical Characteristc  
 
Magnetic Characteristic
Test Condition:VCC1 = VCC2 =24V,IO = 50mA Magnetic Characteristic
Test Condition:VCC1 = VCC2 =24V,IO = 50mA  
 Note 1: Unit is mT, 1mT=10Gs
 Note2:  When the "S"Pole of the magnetic field is vertical to the front mark of product, we call the magnetic field B>0.

 
 Note 1: Unit is mT, 1mT=10Gs
 Note2:  When the "S"Pole of the magnetic field is vertical to the front mark of product, we call the magnetic field B>0.