AH1902-FA-7

The AH1902 is a high sensitivity micropower Omnipolar Hall effect switch IC with internal pull up and pull down capability. Designed for portable and battery powered consumer equipment such as cellular phones and portable PCs to office equipment, home appliances and industrial applications, the average supply current is only 4.3µA at 1.8V. To support potable equipment the AH1902 can operate over the supply range of 1.6V to 3.6V and uses a hibernating clocking system to minimize the power consumption. To minimize PCB space the AH1902 is available in small low profile X1-DFN1216-4, X2-DFN2015-6 and SOT553 packages.The output is activated with either a north or south pole of sufficient magnetic field strength. When the magnetic flux density (B) perpendicular to the package is larger than operate point (Bop), the output will be turned on (pulled low) and held until B is lower than release point (Brp).

• Omnipolar Operation (North or South Pole)
• Supply Voltage of 1.6V to 3.6V
• High Sensitivity
• Micropower Operation
• Chopper Stabilized Design Provides:
  • Superior Temperature Stability
  • Minimal Switch Point Drift
  • Enhanced Immunity to Physical Stress
• No External Pull-up Resistors Required
• Good RF Noise Immunity
• -40°C to +85°C Operating Temperature
• High ESD capability of 8kV (Human Body Model)
• Small Low Profile X1-DFN1216-4, X2-DFN2015-6 and SOT553 Packages
• Totally Lead-Free & Fully RoHS Compliant
• Halogen and Antimony Free. “Green” Device