AH1892-CD4-7

The AH1892 is a micropower magnetic range selectable (Bop/Brp) Omnipolar Hall effect switch IC with internal pull up and pull down capability, designed for consumer equipment ranging from portable and battery powered cellular phones and portable PCs to home appliances and industrial applications. To support battery powered equipment and low voltage microcontrollers, the AH1892 can operate over the supply range of 1.6V to 3.6V and uses a hibernating clocking system to minimize the power consumption. The average supply current is only 4.3µA typical at 1.80V. Due to the application diversity, the AH1892 has an 8kV ESD rating on the supply and output pins. To minimize PCB space the AH1892 is packaged in the small CSP package (0.71mm x 0.71mm) or SOT553 leaded package.The output is activated with either a north or south pole of sufficient magnetic field strength. The user can select one of two magnetic sensitivity bands via the BSEL pin without the addition of any external components allowing a flexible but small solution. The band select can be hardwired or be changed on the fly via a logic source such as a micro-controller. When the magnetic flux density (B) 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)
• Programmable operate and release points
• Supply voltage of 1.6V to 3.6V
• Micropower operation
• Chopper stabilized design
  • Superior temperature stability
  • Extremely Low Switch-Point Drift
  • Insensitive to Physical Stress
• No external pull up resistors required
• Good RF noise immunity
• -40° C to +85° C operating temperature
• 8kV ESD on supply and output pins
• Miniature U-WLB07070-4 (CSP 0.71mm x 0.71mm typical) and small low profile SOT553
• Totally Lead-Free & Fully RoHS Compliant
• Halogen and Antimony Free. “Green” Device