Thin-Film Resistors for Microwave Applications

5/19/2003 Edited byPETEch Staff Thin-Film Resistors for Microwave Applications Vishay Intertechnology Inc. is offering a series of thin-film single-value chip resistors that feature excellent high-frequency response and low shunt capacitance for exceptional performance in hybrid assemblies and microwave and RF circuits.

In addition to dimensions as small as 0.010 in. (0.25 mm) by 0.020 in. (0.5 mm), the Vishay Electro-Films Microwave Resistor series (MIB, MIC, MID, MIF) features a strip-line design that enables the design of higher-performance end products by providing a solution specifically optimized for microwave and RF requirements. Typical applications for new devices include amplifiers, oscillators, attenuators, couplers, and filters.

Devices in the Microwave Resistor series feature a microwave resistance range of 20 Ω to 1 kΩ and an overall resistance range to 20 kΩ. Tight tolerance values down to ±1.0% are available, with TCR values from ±25 ppm/°C to ±200 ppm/°C. These compact resistor chips provide a stray capacitance of less than 0.2 pF.

Vishay Electro-Films Microwave Resistor series devices feature a maximum operating voltage of 100V, a dielectric breakdown voltage of 400V, and 25 mW to 200 mW maximum dc power ratings at 70°C. The high-stability thin-film resistor element is tantalum nitride, which is self-passivating and moisture resistant. These resistors have an operating temperature range of -55°C to 125°C.

The MIB, MIC, MID, and MIF microwave resistor chips are built with an alumina substrate and gold terminations. They can be attached with conductive epoxy, ribbon-bonded, or wire-bonded. Other Vishay devices that are suitable for use with the Microwave Resistor series include wire-bondable capacitor chips, inductor chips, user-trim resistor chips, and TMR multi-value microwave products.

For more information, visit www.vishay.com.