Micropower Omnipolar Hall Sensor AH3661
  • Micropower Omnipolar Hall Sensor AH3661
  • Micropower Omnipolar Hall Sensor AH3661
Micropower Omnipolar Hall Sensor AH3661 Micropower Omnipolar Hall Sensor AH3661

Micropower Omnipolar Hall Sensor AH3661

    ◆ Features

    Micropower designing;

    Rated supply voltage  2.4 V ~ 5.5 V;

    Omnipolar operating, no “N” or “S” pole in excitation magnetic field, high magnetic sensitivity, highly symmetry in positive and negative magnetic switch point;

    Built-in dynamic imbalance voltage compensition circuit, high temperature stability, Small temperature drift in switch point, resistant to mechanical stress and thermal stress, the power consumption is only 8μW, when the power supply is 2.75V;

    Products meet the EU RoHS instruction 2011/65 / EU and REACH regulations 1907/2006 / EU requirements.。


◆ Outline

AH3661 is a kind of high sensitivity omnipolar micropower Hall sensor. The special designing circuit enable the sensor has omnipolar (no “S” or “N” pole) magnetic field excitation function, excellent positive and negative switch symmetry, and bitty average power consumption current. When the magnet (no “S” or “N” pole) is closed to sensor(∣B∣≥∣Bop∣),the sensor outputs low level; when the magnet is far away from sensor ∣B∣≤∣Brp∣), the sensor outputs high level. Stable Hysteresis(Bhx =∣Bopx- Brpx∣)ensure the sensor’s stable switch status, the sensor’s magnetic and electric transfer characteristic curve is shown as the figure:


◆ Block Diagram


The sensor chip has voltage regulators, Hall-voltage generator, dynamic imbalance voltage compensator, awake/sleep controller, difference amplifier, Schmitt trigger, logic controler and open collector output driver circuit unit etc.

◆ Sleep Period

The chip has built-in awake/sleep clock control circuit, and its awake/sleep period time is shown in the figure:


◆ Limit Parameter

Storage Temp.Ts-55150
Supply VoltageVCC2.47V
Permitted Power Consumtionpd300mW
Magnetic InductionBunllimitedunlimitedmT
Output CurrentIO5mA

◆ Electrostatic Grade

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

◆ Operating Condition

Supply VoltageVCC2.45.5V
Operating Temp.Ta-4085
Output CurrentIO5mA

◆ Electrical Characteristc

ParamaterSymbolTest    ConditionTyp.MaxUnit
Output Low LevelVOLVCC1= VCC2=2.75V, IO=1mA,BBOP0.10.25V
Awake power consumptinn currentIAWKAwake,VCC1=2.75V,Vo    open circuit35mA
Sleep power powr consumption    currentISLPSleep,VCC1=2.75V,Vo open circuit24μA
Average Power Consumption    CurrentIAVGVCC1=2.75V,Vo open circuit35μA
Awake TimetAWVVCC1= 4V,RL=200Ω,Vo open circuit125150μs
PeriodtPVCC1=    4VRL=200ΩVoopen circuit60180ms
Duty FactorfdVCC1= 4V,RL=200Ω,Vo Open circuit0.05%

◆ Magnetic Characteristic

Test condition :VCC1 = VCC2 =2.75V,IO = 1 mA

S pole Operate PointBOPS34
N Pole Operate PointBOPN-4-3
S Pole Release PointBRPS0.51.5
N Pole Release PointBRPN-1.5-0.5

     ∣BOPX    - BRPX∣


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.

◆ Package Outline


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


Note: In the above package outline figure, Pin 1: Vcc, Pin 2: GND, Pin 3: Output terminal.


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

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