Omnipolar Hall Effect Switches
AH9249

HIGH SENSITIVITY MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH

Product Overview Specs

Data
Sheet
Output Type Description Operating Voltage
(V)
Average Supply Current (µA) Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Min) Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Typ) Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Max) Release Point Brp (Brps +ve/Brpn -ve) Gauss (Min) Release Point Brp (Brps +ve/Brpn -ve) Gauss (Typ) Release Point Brp (Brps +ve/Brpn -ve) Gauss (Max) Operating Ambient Temperature Range
(°C)
Package Outlines
Single Internal Pull-up Resistor Active Low
High Sensitivity Micropower Omnipolar Hall Effect Switch
2.5 to 5.5
10
-
-55
30
-30
- - 20
-20
- -5
-40 to +85

Features

  • Micropower Operation
  • 2.5 to 5.5V Power Supply
  • Switching for Both Poles of a Magnet (Omnipolar)
  • Stabilized Chopper
  • Superior Temperature Stability
  • Digital Output Signal
  • Built-in Pull-up Resistor
  • ESD Rating: 4000V (Human Body Model) 600V (Machine Model)

    Description

    The AH9249 is an ultra-sensitive Hall-effect switch with digital latched output, mainly designed for battery-operation, hand-held equipments. Special CMOS process is used for low-voltage and low-power requirement. A chopper stabilized amplifier improves stability of magnetic switch points. A sleep-awake logic controls the IC in sleep ime or awake time. This function will reduce the verage operating current of the IC. During the wake time, the output is changed with the magnetic lux density. During the sleep time, the output is atched in its previous state and the current consumption will reduce to some μA. The IC switching behaviour is omnipolar, either north or south pole sufficient strength will turn the output on. If the magnetic flux density is larger than operating point(BOP), the output will be turned on; if it is less than releasing point(BRP), the output will be turned off.

    Applications

  • Cover Switch in Notebook PC/PDA
  • Handheld Wireless Application Awake Switch
  • Magnet Switch in Low Duty Cycle Applications

    Downloads


  • Package Outline Information

    • SOT23

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