Hall effect switch extends flexibility of detection circuit designs
1 min read
Diodes' new programmable omnipolar Hall effect switch is optimised to let designers use the same contactless detection circuit in multiple applications or with different field strengths.
The miniature and micro power AH1898 is suitable for numerous portable consumer applications, including mobile phones, tablets and cameras.
Able to detect both north and south magnetic fields, the device features a band-select pin, which allows device sensitivity to be changed to one of two predefined magnetic sensitivity ranges.
It can also be used change the band on the fly, using an external logic source or microcontroller. The high sensitivity of the Hall sensor also means that it can support weaker, lower cost magnets and can be used at a greater distance from the magnet.
The AH1898 is available in a 0.8 x 0.8mm CSP package and has been optimised for use over a 1.6 to 3.6V low voltage supply range.
With an average supply current of just 4.3µA (typical) at 1.8V, Diodes says it helps to extend portable battery cell lifetime.
