Hall effect switch aids portable product miniaturization
Introduced as the smallest programmable omnipolar Hall effect switch, the AH1892 is well-suited for proximity and position detection in space-constrained portable and battery-powered products, including tablets, smart phones and camcorders. It is provided in the miniature 4-pin 0.7 x 0.7 x 0.5-mm U-WLB0707-4 package — claimed seventeen times smaller than the common 3-pin TSOT packaged alternatives.
Features include an operating voltage supply range, from 1.6 to 3.6 V, an average current consumption of just 4.3 µA, and an extended temperature range from –40° to 85°C. The device provides protection against electrostatic discharge to a level of 8-kV on supply and output pins.
The package's space-saving advantage is further enhanced by the switch's integrated pull-up resistors. A simple band select pin enables device sensitivity to be programmed to one of two predefined magnetic sensitivity ranges, allowing the device to be used in multiple applications with different field strengths. Sensitivity can also be adjusted on the fly via an external logic source such as a microcontroller, whereby band can be adjusted with a simple firmware upgrade. ($0.20 ea/10,000 — available now)
By Christina Nickolas
Diodes , Plano , TX , United States
Sales 972-987-3900
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