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Vishay Precision Group debuts foil resistor flip-chip

Posted: 29 Jul 2013 ?? ?Print Version ?Bookmark and Share

Keywords:Vishay Precision Group? flip-chip? resistor? ESD protection?

Vishay Precision Group recently announced that its Vishay Foil Resistors brand (VFR) has unveiled the FRFC 0805, a new ultra-high-precision Z1-Foil flip-chip resistor with exceptional load-life stability of 0.005 per cent (50 ppm) at 70C and rated power for 2,000 hours; low typical TCR of 0.05 ppm/C from 0C to 60C and 0.2 ppm/C from -557deg;C to 125C (257deg;C ref.); power TCR (delta R due to self-heating) of 5ppm at rated power; and tight tolerances to0.01 per cent.

Based on VFR's Bulk Metal Z1-Foil technology, the FRFC 0805 (foil resistor flip-chip), the FRFC 0805 is noise-free and provides ESD protection of 25kV or more for increased reliability. The device's solid element alloy is matched to the substrate, forming a single entity with balanced resistance versus temperature characteristics for an unusually low and predictable TCR over a wide temperature range from -55C to more than 125C. The adhesive that holds the foil to the flat substrate withstands high temperatures, pulsing power, moisture incursions, shock and vibration, and low-temperature exposure while still holding securely to the foil element. Resistance patterns are photo-etched into the element to permit the trimming of resistance values to very tight tolerances as low as 0.01 per cent.

The FRFC devices are qualified as anti-sulphurated resistors for use in environments with high levels of contamination. Such environments include alternative energy applications, industrial control systems, sensors, RTDs, electric instrumentation, weather and communication base stations, and any electronic appliance used in high concentrations of sulphur.

The FRFC 0805 offers a wide resistance range from 5 to 8K. Any resistance value within this range is available at any tolerance with no additional cost or lead time effect. The resistor features power ratings to 200mW at 70C, a rise time of 1.0ns with effectively no ringing, a thermal stabilisation time of less than 1s (within 10ppm of steady state value), current noise of 0.010?V rms/V of applied voltage (less than -40 dB), and a voltage coefficient of less than 0.1ppm/V. The RoHS-compliant device offers a non-inductive (less than 0.08?H), non-capacitive design and is available in matched sets upon request.

Samples and production quantities of the FRFC 0805 are available now, with lead times of five working days for samples and five weeks for larger orders.





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