A zero-drift, 20 kHz operational amplifier, the LTC2063 from Linear
Technology draws just 1.3 µA typical (2 µA maximum) on a 1.8 V supply.
Self-calibration
circuitry results in maximum input offset of 5 µV at 25°C and maximum
drift of 0.06 µV/°C from -40°C to +125°C. In addition, maximum input
bias current is 15 pA at 25°C and 100 pA from -40°C to +125°C.
These
precision input characteristics allow the use of high-value resistors
in the feedback network, keeping power consumption low without
compromising accuracy, event at elevated temperatures. The LTC2063’s
rail-to-rail inputs and outputs simplify single supply use and enhance
dynamic range.
An integrated EMI filter provides 114 dB rejection
at 1.8 GHz. With low 1/f noise inherent to its zero-drift architecture,
the LTC2063 is well-suited for amplifying and conditioning
low-frequency sensor signals in high-temperature industrial and
automotive systems, as well as portable and wireless sensor networks.
Offered
in 6-lead SC70 and 5-lead TSOT-23 packages, the LTC2063 operates from
supply voltages of 1.7 V to 5.25 V and is fully specified from -40°C to
+125°C. Prices start at $1.50 each in lots of 1000 units.
http://www.edn.com/electronics-products/other/4458658/Op-amp-keeps-power-levels-low
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