Vishay Intertechnology is adding new devices that have a low absolute TCR of ±10 ppm over the full -55 to +125°C temperature range to its CTN series of centre-tapped nichrome resistor chips. With superior stability at 250 mW power levels and a compact chip size of 0,76 x 0,76 mm, these CTN resistor chips offer designers a single, flexible solution for applications requiring a much tighter TCR spread between resistors at different positions in a hybrid assembly, says the manufacturer.
Designed primarily for use in feedback circuits in amplifiers requiring ratio matching, high power, and tracking between two resistors, the ±10-ppm/°C resistors are capable of operating as a single-value resistor or as two resistors with a centre tap feature. Total resistance ranges from 1 kΩ to 1 Mω with standard tolerances down to 0,1%. TCR tracking between halves is ±2 ppm/°C, and the centre tap ratio is 1 ±1% standard.
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