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Zero-drift op amp consumes 1.3µA

The LTC2063 zero-drift op amp from Analog Devices is said to draw 1.3μA typ (2μA max) on a 1.8V supply. According to the company, the micropower amplifier maintains uncompromised precision.

Maximum input offset voltage is 5μV at 25°C, maximum drift is 0.06μV/°C from -40 to 125°C. Maximum input bias current is 15pA at 25°C, and 100pA from -40 to 125°C.

These high precision input characteristics are said to allow the use of large value feedback network resistors, keeping power consumption low without compromising accuracy, even at elevated temperature.

Rail-to-rail inputs and outputs simplify single supply use and enhance dynamic range. An integrated EMI filter provides 114dB electromagnetic interference rejection at 1.8GHz.

With low 1/f noise inherent to its zero-drift architecture, the LTC2063 is claimed to be well suited for amplifying and conditioning low frequency sensor signals in high temperature industrial and automotive systems as well as portable and wireless sensor network applications.

Operating on supply voltages from 1.7 to 5.25V, the LTC2063 is available in SOT-23 and SC70 packages. The SC70 version includes a shutdown mode which reduces current consumption to 90nA when the amplifier is not in use. This is said to enable ultralow power duty cycled sensor applications.

Peggy Lee

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