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Publication Date: 02/1/2011
Archive >  February 2011 Issue >  New Products > 

BI Technologies Offers Custom High-Rel Resistor Networks
Hermetically sealed resistor networks.
Fullerton, CA — TT electronics BI Technologies has introduced a series of custom thin film resistor networks in hermetically-sealed metal or HTCC (high-temperature cofired ceramic) packages. Designated the Model 144 Series, these high-reliability resistor networks can be specified with custom schematics, non-standard resistance values and ultra-tight resistance and TCR tolerances to meet the unique requirements for military electronics systems, avionics and aerospace circuits.

The products provide military and aerospace electronics design engineers with the capability to integrate ultra-precision resistor networks into high reliability circuits for harsh environments, especially for elevated temperatures.

According to the company, it can produce custom networks with up to 25 resistors that mix and match resistor values based on the customer's requirements, and through proprietary processing and packaging, can achieve ratio tolerances between individual resistors in the network down to <±0.01 percent, and TCR tracking tolerances to <±1ppm/°C.

The networks' construction and packaging is designed for hi-rel applications where plastic packaged devices cannot be specified due to elevated temperatures or other harsh environmental conditions. Available in hermetically sealed through-hole DIP and surface mount flatpack packages with 3 to 28 pins, the Model 144 Series networks also incorporate a proprietary passivation coating over the precision nichrome resistive elements to protect against humid environments, and the package cavity is filled with inert nitrogen. The Model 144 Series custom resistor networks feature resistance values from 10Ω to 3MΩ, in tolerances down to ±0.025 percent (ratio tolerances to ±0.01 percent), in ratio values up to 1:1000. Typical TCRs are ±25ppm°/C, with tracking between resistors available to ±1ppm/°C. Operating temperature range is from -55 to +175°C.Screening and testing to MIL-STD-883, MIL-STD-1835, MIL-PRF-38534, MIL-STD-38510 and MIL-STD-202 is available on request; also, Model 144 Series networks can also be ordered in RoHS-compliant versions.

Contact: TT electronics/BI Technologies Corporation, 4200 Bonita Place, Fullerton, CA 92835-1053 714-447-2300 or 714-447-2345 fax: 714-447-2400 E-mail: Web:

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