23 May 2012 Hall effect switch aids portable product miniaturisation Hall effect switch aids portable product miniaturisation Diodes has launched what it says is the world's 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. Provided in a miniature 4pin 0.7 x 0.7 x 0.5mm U-WLB0707-4 package, Diodes claims it is seventeen times smaller than the common 3pin TSOT packaged alternatives. In addition, the device features integrated pull up resistors to simplify the external circuit layout and save more pcb space. 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. The AH1892 has an operating voltage supply range from 1.6 to 3.6V and, with normal operation, is said to consume an average current of just 4.3µA. To help improve product reliability during manufacture and use, the device provides protection against electrostatic discharge to a level of 8kV on supply and output pins. Author Laura Hopperton Comment on this article Websites http://www.diodes.com Companies Diodes Incorporated This material is protected by MA Business copyright See Terms and Conditions. One-off usage is permitted but bulk copying is not. For multiple copies contact the sales team. What you think about this article: Add your comments Name Email Comments Your comments/feedback may be edited prior to publishing. Not all entries will be published. Please view our Terms and Conditions before leaving a comment.