Zero-Drift Op Amp Consumes Only Microamps (.PDF Download)

July 21, 2017
Zero-Drift Op Amp Consumes Only Microamps (.PDF Download)

“Analog design is now a combination of transistors and ICs that provide high functionality in analog signal processing,” says Bob Dobkin, VP of Engineering and Chief Technical Officer of Linear Technology Corp. “And, analog design is in greater demand now than ever before.”

A key analog IC is the operational amplifier, commonly called an op amp. One of the newest op amps is Linear Technology’s LTC2063, a single low-power, zero-drift, 20-kHz IC. The LTC2063’s high-precision input characteristics allow use of large-value feedback network resistors, keeping power consumption low without compromising accuracy, even at elevated temperatures. Its operational features include:

  • Supply voltage: 1.7 V to 5.25 V
  • Supply current: 1.3 μA (typ), 2 μA (max) on a 1.8-V supply
  • Maximum input offset voltage: 5 μA at 25°C
  • Maximum drift: 0.06 μV/°C from –40°C to 125°C
  • Maximum input bias current: 15 pA at 25°C, 100pA from –40°C to 125°C
  • Open loop gain (AVOL): 140 dB (typ)
  • Low charge power-up for duty-cycled applications

Rail-to-rail inputs and outputs simplify single supply use and enhance dynamic range. An integrated electromagnetic-interference (EMI) filter provides 114-dB EMI 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-network applications.


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