Diodes has designed a programmable omnipolar Hall effect switch is able to detect both north and south magnetic fields.
The AH1898 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 Hall switch has been optimised for use over a 1.6V to 3.6V low-voltage supply range and employs a hibernating clocking system to minimise power consumption. Average supply current is 4.3μA (typical) at 1.8V.
The AH1898 has been designed with an 8kV ESD rating on supply and output pins. The switch's chopper stabilised design improves temperature stability over the operating range from -40oC to 85oC.
It is available in the miniature 0.8mm x 0.8mm CSP package.
