Ceramic network offers military level precision

Welwyn Components has developed a military voltage divider that provides two matched resistors with precision absolute and ratio tolerances (+/-0.05%, +/-0.01%) on a single chip.

Providing military and aerospace analogue design engineers with a precision two-element resistor network in a 1206 chip package, TT Electronics Welwyn Components has developed a military voltage divider that provides two matched resistors with precision absolute and ratio tolerances (+/-0.05%, +/-0.01%) on a single chip.

Designated the D1206 Series, the ceramic chip exhibits better TCR tracking, higher accuracy, and significant board space savings compared with designs using two discrete resistors.

According to John Graham, Marketing and Sales Director for Welwyn Components, the D1206 Series dividers are ideal for precision analogue circuit designs for military and aerospace applications, especially gain control circuits in op amps and as a reference voltage for military power supplies.

"The tantalum nitride resistive element provides long term stability over time and temperature, and is impervious to the corrosion problems often experienced with other types of resistive materials under biased humidity, as well as other harsh environmental conditions".

The D1206 Series voltage divider is composed of two TaNFilm tantalum nitride resistors on ceramic substrate, packaged on a standard 1206 size chip, which has a lower profile and occupies less board space than conventional plastic packaged (SOT-23) networks.

The dividers feature a resistance range of 100ohm to 200kohm, with absolute tolerances to +/-0.05% and ratio tolerances to +/-0.01%.

TCRs are +/-25ppm/C absolute and +/-5ppm/C tracking.

Power dissipation is 250mW and the operating temperature range is -55 to +125C.

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