Linear launches 50µA CMOS amps with 0.7µV/°C drift

Linear Technology’s new family of CMOS amplifiers delivers DC precision at low supply current. The company says that the LTC6078 dual and LTC6079 quad op amps offer a breakthrough combination of specifications with input DC characteristics similar to the best precision bipolar amplifiers due to their design architecture.

The amplifiers have an input offset voltage of 25µV max and guaranteed offset voltage drift of 0.7µV/°C max while drawing 55µA per channel quiescent current. This implies a tenfold reduction in power consumption over existing op amps with similar DC accuracy.

The LTC6078/LTC6079 maintain their input precision across the common mode range, with a rail-to-rail input stage. The low bias current, 1pA max, allows optimum DC accuracy with high source impedance and feedback resistors. Also, the CMRR of 110dB and high voltage gain of 120dB preserve precision performance. Operating on a 2.7V to 5.5V supply range, the amplifiers' outputs swing rail-to-rail. Supply current is reduced to less than 2µA using the shutdown feature.

The LTC6078 dual is available in 8-pin MSOP and 3mm x 3mm DFN packages and the LTC6079 quad in the 16-pin SSOP and 5mm x 3mm DFN packages. Specified to operate over commercial, industrial and automotive temperature ranges. 1,000-piece pricing starts at $1.49 each for the LTC6078 dual and $2.53 each for the LTC6079 quad.

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