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Resistor net package eliminates parasitics

Posted: 11 May 2007     Print Version  Bookmark and Share

Keywords:resistor networks  ceramic BGA  eliminate parasitic effects  CHC-Precision Series 

TT electronics IRC's precision resistor networks in ceramic BGA

TT electronics IRC Advanced Film Division provided design engineers with a series of precision resistor networks for applications requiring tight tolerances and ratios. Available in ceramic BGA package, the CHC-Precision series feature all circuits on the bottom side of the device to eliminate wrap-around terminations.

According to Jerry Seams, business development and applications engineer for IRC Advanced Film Division, the design of the CHC-Precision BGA package offers several advantages.

"The single-sided monolithic design allows us to eliminate parasitic effects due to wrap-around terminations," explained Seams. "Moreover, with a high precision device such as this, it is essential to be able to wash under the component to eliminate the detrimental shunting effects of uncleaned assembly process residues."

The device is suitable for industrial applications, process control and monitoring, medical equipment, instrumentation and metering.

The resistor networks are available in 8-pad and 16-pad packages. The BGA features a resistance range from 10Ω to 100KΩ, with a maximum working voltage of 50V.The device features TCR tracking to ?5ppm/?C, ratio tolerances to ?0.05 per cent, absolute tolerances to ?0.1 per cent and absolute TCRs to ?25ppm/?C. The operating temperature range is -55?C to 150?C. IRC will also produce devices outside these specifications to meet customer requirements.

The CHC-Precision Series BGA uses IRC's patented TaNFilm (tantalum nitride) technology. The TaNFilm process produces precision tantalum nitride thin film resistive elements that are immune from corrosion problems in humid environments. The self-passivating properties of tantalum nitride enables a more stable, reliable resistive device. This process allows IRC to manufacture custom circuit configurations and multiple resistance values without compromising tight tolerance or tracking characteristics.

Pricing for the CHC-Precision Series BGA package starts at Rs.42.27 ($1) each in quantities of 10,000 pieces. Lead time is from stock to 10 weeks ARO.

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