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Micropower Hall Sensor AH3662

◆ 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;

Built-in pull-up resistor;

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

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ДЕТАЛИ ПРОДУКТА

◆ Outline

AH3662 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:

微功耗霍尔传感器AH3662

◆ Block Diagram

The sensor chip has voltage regulators, Hall-voltage generator, dynamic imbalance voltage compensator, temperature compensator, awake/sleep controller, difference amplifier, Schmitt trigger, logic controler , built-in pull-up resistor (R= 100 kΩ）, 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

Parameter	symbol	Min.	Max.	Unit
Storage Temp.	Ts	-55	150	℃
Supply Voltage	VCC	2.4	7	V
Permitted Power Consumption	pd	—	300	mW
Magnetic Induction	B	unlimited	unlimited	mT
Output Current	IO	—	5	mA

◆ Electrostatic Grade

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

◆ 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 Characteristc

Paramater	Symbol	Test Condition	Typ.	Max	Unit
Output Low Level	VOL	VCC1= VCC2=2.75V， IO=1mA，B≥BOP	0.1	0.25	V
Awake power consumptinn current	IAWK	Awake，VCC1=2.75V，VoOpen circuit	3	5	mA
Sleep Power Consumption current	ISLP	Sleep，VCC1=2.75V，Vo Open circuit	2	4	μA
Averaage Power Consumption Current	IAVG	VCC1=2.75V，Vo Open circuit	6	9	μA
Awake Time	tAWV	VCC1= 4V，RL=200Ω，Vo Open circuit	125	150	μs
Period	tP	VCC1= 4V，RL=200Ω，VoOpen Circuit	60	80	ms
Duty Factor	fd	VCC1= 4V，RL=200Ω，VoOpen Circuit	0.1	—	%

◆ Magnetic Characteristic

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

Parameter	Symbol	Min.	Typ.	Max.
S pole Operate Point	BOPS	—	3	4
N Pole Operate Point	BOPN	－4	-3	—
S Pole Release Point	BRPS	0.5	1.5	—
N Pole Release Point	BRPN	—	-1.5	－0.5
Hysteresis ︱BOPX － BRPX︱	BHX	—	1	2

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

◆ Package Outline

微功耗霍尔传感器AH3662