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Omnipolar Micropower Hall Effect Sensor AH3662
  • Omnipolar Micropower Hall Effect Sensor AH3662
  • Omnipolar Micropower Hall Effect Sensor AH3662
Omnipolar Micropower Hall Effect Sensor AH3662 Omnipolar Micropower Hall Effect Sensor AH3662

Omnipolar Micropower Hall Effect Sensor AH3662

    Features

    Micropowr designing;

    Rated working voltage 2.4V ~ 5.5V,

    Work under Omnipolar, the excitation field regardless of N or S pole, high magnetic sensitivity, highly symmetric of positive and negative magnetic switching points;

    Built-in dynamic offset voltage compensation circuit, high temperature stability, small drift switching point, resistance to mechanical stress and thermal stress;

    Ultra small power consumption, it’s only 8μW when the power supply is 2.75V

    Built-in pulling resistance

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


PRODUCTS DETAILS

Outline

AH3662 is an Omnipolar micro-power high sensitivity Hall effect sensor, special designed circuit make it owns omnipolar(regardless S pole or N pole) magnetic field excitation function, excellent symmetry of the positive and negative magnetic switch, and very small average current consumption characteristics.  

When the magnet(regardless S pole or N pole)  is closed to sensor(︱B︱≥︱Bop︱),the sensor outputs low level; When the magnet is far away with the sensor(︱B︱≤︱Brp︱), the sensor outputs high level. Stable hysteresis (Bhx =︱Bopx--Brpx︱)enables the sensors stable switch state. The sensors' magnetic and electric transfer characteristic curve is shown as the figure: 

Omnipolar Micropower Hall Effect Sensor AH3662

Block Diagram

Omnipolar Micropower Hall Effect Sensor AH3662

The sensor chip integrated with voltage regulator, Hall effect voltage generator, dynamic offset compensated, temperature compensator, wake / sleep controller, differential amplifier, Schmitt trigger, logic controller, built-in pulling resistance (R=100kΩ)as well as open-drain output driver and other circuit unit.

Sleep cycle

The product chip is with built-in awake/sleep clock control circuit, its awake/sleep cycle time is shown as the figure:

Omnipolar Micropower Hall Effect Sensor

Limit  Parameter

Parameter

Symbol

Min.

Max.

Unit

Storage temp.

Ts

-55

150

Supply voltage

VCC

2.4

7

V

Admitting power loss

pd

300

mW

Magnetic strength

B

unlimited

unlimited

mT

Output current

IO

5

mA

Electrostatic grade

Under human being mode, it’s larger than ±6kV (Electrostatic pressure resistance)

Operating Condition

Parameter

Symbol

Min

Max

Unit

Supply voltage

VCC

2.4

5.5

V

Operating Temp.

Ta

-40

85

Output current

IO

5

mA

Electrical characteristic

Prameter

Symbol

Test Condition

Typ.

Max

Unit

Output low level

VOL

VCC1= VCC2=2.75V, IO=1mA, BBOP

0.1

0.25

V

Awake supply current

IAWK

Awake,VCC1=2.75V,Vo open circuit

3

5

mA

Sleep supply current

ISLP

Sleep,VCC1=2.75V,Voopen circuit

2

4

μA

Average Current

IAVG

VCC1=2.75V,Vo open circuit

6

9

μA

Awake time

tAWV

VCC1= 4V,RL=200Ω,Voopen circuit

125

150

μs

Cycle

tP

VCC1= 4V,RL=200Ω,Voopen circuit

60

80

ms

Duty factor

fd

VCC1= 4V,RL=200Ω,Vo open circuit

0.1

%

Magnetic Characteristic

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

     Prameter

    Symbol

Min.

Typ.

Max

S Pole Operating Point

BOPS

3

4

N Pole Operating Point

BOPN

-4

-3

Spole Release Point

BRPS

0.5

1.5

Npole Release Point

BRPN

-1.5

-0.5

   Hysteresis︱BOPX - BRP︱

BHX

1

2

Note1: Unit is mT,1mT (mT)=10(Gs)

Note 2:  Pole S is vertical to the mark surface of the product, the field defined into B>0。

Package outline 

Omnipolar Micropower Hall Effect Sensor AH3662

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

1534837519651848.jpg

Note: In the package outline figure, Pin 1 is Vcc, Pin 2 is GND, Pin 3 is output

Mark

Mark XX or AHXX means abbreviated parts No., the second line XXXX means product lot No.

Pin configuration

a)M Type: It faces product mark, and two pins are downward, towards the left, clockwise, the pin No. is 1、2、3 in turn.

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