Thin film resistor networks

9 July 2008 Passive Components

Providing design engineers with a variety of substrate materials to suit specific applications and requirements, 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 utilise 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. Additional benefits for ceramic substrates include low electrical parasitic losses, low NRE/NRT costs and small minimum order quantities while the silicon substrates feature a lower cost in high order quantities.

Typical applications for the 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 1 kΩ to 100 kΩ for the isolated networks and 1 kΩ to 30 kΩ for the bussed networks. Ratio tolerance is less than ±0,05% 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 1 to 100 kΩ. Absolute tolerances at 25°C are to ±0,1% with TCR tracking to ±5ppm/°C. Operating temperature also ranges from -55°C to +125°C.

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