AH189x, AH1812, and AH3360 Hall Switches

Diodes Incorporated introduces six high-performance Hall-effect sensor switches, designed to save power in position and proximity detection roles in a variety of consumer, home appliance, and industrial equipment. Optimized for a supply voltage range from 1.6 V to 3.6 V and using a hibernating clocking system to minimize power consumption, the switches’ average supply current is typically 4.3 μA at 1.8 V. The micropower Hall-effect product introduction comprises the medium-sensitivity AH1895 and high-sensitivity AH1893, AH1897, and AH1812 omnipolar switches. Also included are the programmable high-sensitivity AH1894 omnipolar switch and the AH3360, a high-sensitivity unipolar (south pole) switch. These simple devices are offered in space-saving and low-profile X1-DFN1216-4 (1.2 mm x 1.6 mm x 0.5 mm) and leaded SOT553 (1.6 mm x 1.6 mm x 0.5 mm) packages.

All devices, with the exception of the AH1812, include an internal push-pull output structure, which enables a reduction in external component count and a simplification of PCB layouts. The AH1812 provides an open-drain output option for added flexibility in system pull-up. A chopper-stabilized design means these highly-integrated devices offer improved temperature stability, immunity to stress effects, and minimal drift across their operating temperature range of -40ºC to +85ºC. Protection against ESD is also high at 8 kV, helping to improve product robustness and simplifying handling during manufacture. Providing additional design flexibility, the programmable-variant AH1894 enables users to select between one of two magnetic sensitivity ranges using a band-select pin, allowing the one device to accommodate different strengths of magnets located at different distances from the Hall sensor. Band-selection can either be hardwired or programmed electronically using an external logic source such as a microcontroller.