Hall Effect Sensor Manufacturer-Nanjing AH Electronic Science & Technology Co., Ltd.

Unipolar Hall IC
Unipolar Hall Sensor AH441
  • Unipolar Hall Sensor AH441
  • Unipolar Hall Sensor AH441
  • Unipolar Hall Sensor AH441
Unipolar Hall Sensor AH441Unipolar Hall Sensor AH441Unipolar Hall Sensor AH441

Unipolar Hall Sensor AH441

    ◆ Features 

    Rated working voltage 4.5 V ~ 24 V, the limit voltages as low as 3.5 V;

    Operating temperature range: -40℃ ~ 150℃;

    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.


◆ Outline

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 Hysteresis((BH= |BOP- BRP|)ensure the stable sensor’s switch status. The magnet and electric transfer characteristic curve of AH441 is shown as the figure:


◆ Block Diagram


Hall sensor AH441 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 drives 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.

◆ Limit Parameter

Storage Temp.Ts-55175
Supply VoltageVCC3.528V
Output Cut-off VoltageVO(off)25V
Magnetic InductionBunlimitedunlimitedmT
Output CurrentIO50mA

◆ Electrostatic Grade

Under human being mode, the Electrostatic compression is large than ±6kV.

◆ Operating Condition

Supply VoltageVCC4.524V
Operating Temp.Ta-40150
Output CurrentIO5mA

◆ Electrical Characteristc 

ParamaterSymbolTest    ConditionTyp.MaxUnit
Output Low LevelVOLVCC1=4.5, VCC2=24V, IO=25mA,BBOP0.20.4V
Output High LevelVOHVCC1=4.5, VCC2=24V, IO=25mA,BBRP23.524V
Output Leakage currentIOHVCC2=24V,VCC1Open    Circuit0.110μA
Supply CurrentICCVCC1=24V,Vo Open    Circuit3.58mA
Output    Rise Edge TimetRVCC1=VCC2=12V,
     RL=1.2kΩ,    CL=20pF
Output Fall    Edge timetF6080ns

◆ Magnetic Characteristic

 Test Condition: VCC1 = VCC2 =24V,IO = 50mA

Operate PointBOP1012
Release PointBRP47
     ∣Operate point-Release point∣

Note 1: Unit is mT, 1mT=10Gs .

Note 2:  When the “S”Pole of the magnetic field is vertical to the front mark of product, we call the magnetic field B>0.

Note 3: For M type ( SOT23-3L) product, the operating magnetic field is subject to “N” pole. 

◆ Package Outline

SOT23-3L(M type)Package figure(Unit: mm)


SOT89-3L(S type)Package figure(Unit: mm)


TO-92UA/TO-92S(UA type)package figure(Unit: mm)


Note: In the above package outline figure, Pin 1: Vcc, Pin2: GND, Pin 3: Output terminal.


Mark “XX” or “AHXX” are abbreviation form of the parts No., the second line”XXXX”means product lot No.

Contact Us
  • Tel.: +86 25 8467 0370 / +86 25 8460 9021
  • E-mail: nianrong@ahest.com
  • Fax: +86 25 8467 0370
  • Add.: Building 3, Huaye Park, Qidi City, 8, Zhineng Road, Qilin Science and Technology Innovation Park, Nanjing, China.
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