Solutions Search - LTC6090/LTC6090-5 - 140V CMOS Rail-to-Rail Output, Picoamp Input Current Op Amp

Avoid Amplifier Output Driver Saturation When Using pA Bias Current Amplifiers with High Source Impedance Sensors

Jon Munson - Applications Engineer
Kevin B. Scott - Senior Strategic Marketing Engineer Mar 26th 2015
Need for Low Bias Current Amplfiers When taking sensor measurements, the type of sensor excitation used varies greatly; it can be a DC signal, an AC signal, a voltage source, a current source or a pulsed source to name a few. When using current source excitation or when using a high impedance sensor, the amplifier's bias current ...

High Voltage CMOS Amplifier Enables High Impedance Sensing with a Single IC

Jon Munson - Applications Engineer Apr 1st 2013
Introduction Accurately measuring voltages requires minimizing the impact of the instrument connection to the tested circuit. Typical digital voltmeters (DVMs) use 10M resistor networks to keep loading effects to an inconspicuous level, but even this can introduce significant error, particularly in higher voltage circuits that ...