Vishay Precision Group… Gadzooks, Foiled Again (Resistors)

[SatNews] Vishay Precision Group, Inc. (NYSE: VPG) is now offering a wide variety of resistors built on Bulk Metal(r) Foil technology with new techniques and materials that improve reliability and stability for demanding military, avionics, and space applications.

These products include the VSMP, VCS1625Z, VCS1625, VCS1610, CSM2512, CSM3637, Z201, S102C, DSMZ, and SMNZ. These new-generation precision resistors are virtually insensitive to destabilizing factors. Their resistive elements are made of a solid alloy that displays the desirable bulk properties of its parent material; thus it is inherently stable, noise-free, and immune to ESD to 25 kV and beyond. The resistive element and matched substrate form a single entity with balanced temperature characteristics for an unusually low and predictable TCR over a wide temperature range from -55°C to more than +200°C. Resistance patterns are photo-etched to permit trimming of resistance values to very tight tolerances.

Several factors need to be considered when selecting a resistor for space and military applications, including TCR (ambient temperature), power TCR (self heating), load-life stability, end-of-life tolerance, thermal EMF, thermal stabilization, and ESD. These Bulk Metal Foil resistors, based on a new generation technology and improved production methods starting in December 2010, offer designers the complete set of top performance characteristics to simplify circuitry and lower overall system costs by reducing the number of required parts while assuring a better end product.

Vishay foil resistors feature a long-term load-life stability within 0.005% after 2,000 hours and 0.015% after 10,000 hours under full rated power at +70°C. In addition to their low absolute TCR, the devices offer power TCR (“ΔR due to self heating”) to ±5 ppm at rated power, tight tolerances from 0.01% — or even 0.001% (10 ppm) in hermetically sealed packages — and thermal EMF of 0.05 µV/°C. Vishay Foil will be demonstrating its new resistors for aviation, military, and space (AMS) applications at the 15th annual CMSE Conference being held Monday, Feb. 7 in Los Angeles.