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Resistor nets come in silicon, ceramic substrates

Posted: 12 May 2008 ?? ?Print Version ?Bookmark and Share

Keywords:resistor networks? thin-film network? substrate choices?

S Series

Providing design engineers with a variety of substrate materials to suit specific applications and requirements, TT electronics BI Technologies offers its thin-film resistor networks on both silicon and ceramic substrates.

The S Series precision resistor networks are constructed using a silicon substrate, while the Model 660 precision thin-film networks utilize a ceramic substrate. Both families of thin-film networks feature isolated and bussed circuits along with a unique passivation coating to eliminate moisture concerns.

"There are benefits to both ceramic and silicon substrates〞while ceramic substrates feature superior electrical properties and long term stability, silicon substrates have more packaging options and a finer line width capability, yielding increased resistance per network," said Mike Torres, fixed film product marketing manager for BI Technologies. "By offering resistor networks using each type of technology, we are better able to meet all of our customers specific application requirements."

Additional benefits for ceramic substrates include low electrical parasitic losses, low NRE/NRT costs and small minimum order quantities. The silicon substrates feature a lower cost in high order quantities.

Typical applications for the thin-film resistor networks include instrumentation amplifiers, precision voltage dividers, precision analog circuits, measurement bridge and low-noise circuitry, ladder networks and converter applications.

The S Series networks feature a resistance range from 1k次 to 100 k次 for the isolated networks and 1k次 to 30k次 for the bussed networks. Ratio tolerance is less than ㊣0.05 percent with TCR tracking tolerances of less than ㊣5ppm/∼C. Operating temperature ranges from -55∼C to +125∼C.

The Model 664, 667 and 668 networks feature a resistance range of 1k次 to 100k次.

Absolute tolerances at 25∼C are to ㊣0.1 percent with TCR tracking to ㊣5ppm/∼C. Operating temperature ranges from -55∼C to 125∼C.

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