Water Heater Sensor, Zero Power Consumption, Wiegand Sensor, Heater

Product Description

• 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
• Outline
• When the "N" pole of magnet faces the mark surface of the sensor and is closed to sensor (B≤Bop),the sensor outputs low level; When the magnet is far away from sensor(B≥B_RP), the sensor outputs high level. When the "S" pole faces the mark surface of sensor,the sensor is no response. Stable Hyteresis((B_H= |B_OP- B_RP|)ensures stable switch status of sensor. The magnet and electric transfer characteristic curve is shown as the figure:
• Hall sensor AH3144N 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 etc. 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

  Parameter	symbol	Min.	Max.	Unit
  Storage Temp.	Ts	-55	175	ºC
  Supply Voltage	VCC	3.5	28	V
  Output Cut-off Voltage	VO(off)	-	25	V
  Magnetic Induction	B	unlimited	unlimited	mT
  Output Current	IO	-	50	mA

   
   
• Electrostatic Grade
• Under human being mode, the Electrostatic compression is large than ±6kV.
  
   
   
• Operating Condition

• Parameter	Symbol	Min.	Max.	Unit
  Supply Voltage	VCC	4.5	24	V
  Operating Temp.	Ta	-40	150	ºC
  Output Current	IO	-	5	mA

   
• Electrical Characteristc

• Paramater	Symbol	Test Condition	Typ.	Max	Unit
  Output Low Level	VOL	VCC1=4.5, VCC2=24V, IO=25mA,B≥BOP	0.2	0.4	V
  Output High Level	VOH	VCC1=4.5, VCC2=24V, IO=25mA,B≤BRP	23.5	24	V
  Output Leakage Current	IOH	VCC2=24V,VCC1 open circuit	0.1	10	μA
  Supply Current	ICC	VCC1=24V,Vo open circuit	3.5	8	mA
  Output Rise Edge Time	tR	VCC1=VCC2=12V, RL=1.2kΩ,    CL=20pF	125	150	ns
  Output Fall Edge Time	tF		60	80	ns

   
  
   
  Magnetic Characteristic
  Test condition:V_CC1 = V_CC2 =24V,I_O = 50mA

  Parameter	Symbol	Min.	Typ.	Max.
  Operate Point	BOP	-25	-	-
  Release Point	BRP	-	-	-3
  Hysteresis ∣Operate point-Release point∣	BH ∣BOP-BRP∣	2	-	6

   
   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.