Vishay’s New 1202 Series of Bulk Metal® Foil Ultra-High-Precision Accutrim™ Trimming Potentiometers

17 JUNE 2009

Vishay Intertechnology, Inc. announced a new series of Bulk Metal® Foil ultra-high-precision Accutrim™ trimming potentiometers, approved 1 ¼-in. rectilinear RJ12 style, designed to meet and exceed the requirements of MIL-PRF-22097 Char. F. For precise adjustment, the devices offer low end-to-end TCR of ± 10 ppm/°C from – 55°C to + 150°C, + 25°C ref., and ±25ppm/°C through the wiper, load life stability of 0.1% typical under full rated power at + 85°C for 2000 hours, and a <0.05% typical settability. Vishay's new 1202 series of ultra-high-precision trimmers features a Bulk Metal Foil resistive element that possesses a unique inherent temperature and load life stability. Their advanced, virtually backlash-free (<0.05%) adjustment mechanism makes them easy to set quickly and accurately, and maintains that setting through temperature cycling and vibration, as well as thermal and mechanical shock. The devices offer a multifingered, noble metal wiper traversing a planar surface of etched Foil for low TCR end-to-end and through the wiper. The 1202 series offers infinite resolution, which when synthesized by a combination of an absolutely uniform resistance material, multiple wiper contact points, and multiple resistance circuit paths, yields a uniquely accurate settability of <0.05%.

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