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Linear Technology Releases New Micropower Op-Amp Consuming Only 1.3µA


The LTC2063 is ideal for use in a wide variety of precision measurement battery-powered applications


Analog Devices announces the release of the LTC2063 zero-drift op amp which draws just 1.3µA typ (2µA max) on a 1.8V supply. This micropower amplifier maintains uncompromised precision: maximum input offset voltage is 5µV at 25°C, maximum drift is 0.06µV/°C from –40°C to 125°C. Maximum input bias current is 15pA at 25°C, and 100pA from –40°C to 125°C. These high precision input characteristics allow the use of large value feedback network resistors, keeping power consumption low without compromising accuracy, even at elevated temperature.

Click for Larger Image - Linear Technology Releases New Micropower Op-Amp Consuming Only 1.3µA 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 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.

The LTC2063 is available in SOT-23 and SC70 packages. The SC70 version includes a shutdown mode which reduces current consumption to just 90nA when the amplifier is not in use. This enables ultralow power duty cycled sensor applications. As an example, a precision low duty cycle oxygen sensor circuit shown in the data sheet consumes less than 200nA average current.

Click for Larger Image - Ideal for use in Battery Applications “The LTC2063 enables a whole new class of precision measurement solutions which can be placed anywhere,” commented Ross Yu, Dust Networks® marketing manager. “Its ultralow power and high precision are a perfect companion for Dust Networks’ SmartMesh® wireless sensor networks, expanding the reach of precision measurements to places previously not practical.”

An example is the DC2369A wireless current sense reference board which uses the LTC2063 and LTP™5901-IPM SmartMesh IP™ module and other micropower components to create an isolated floating current sense measurement platform which can operate for years on small batteries.

The LTC2063 operates on supply voltages from 1.7V to 5.25V and is fully specified from –40°C to 125°C.


Key Features of the LTC2063

  • Low Supply Current: 2µA Maximum
  • Offset Voltage: 5µV Maximum
  • Offset Voltage Drift: 0.02µV/°C Maximum
  • Input Bias Current: 3pA Typical, 30pA Maximum –40°C to 85°C,100pA Maximum –40°C to 125°C
  • Integrated EMI Filter (114dB Rejection at 1.8GHz)
  • Shutdown Current: 90nA Typical, 170nA Maximum
  • Rail-to-Rail Input and Output
  • 1.7V to 5.25V Operating Supply Range
  • Low Charge Power-Up for Duty Cycled Applications
  • AVOL: 140dB Typical

The company's Web site address is www.linear.com.
[Reprinted with kind permission from Analog Devices - Release Date: 24th January, 2018]


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