Instrumentation Amplifier Provides FET Input

Nov. 1, 1998

With a low input bias current of 4 pA, the INA121 FET-input instrumentation amplifier operates from a wide ±2.25V to ±18V supply range and is well suited for amplifying the output of high-impedance sensors such as high-resistance strain-gage bridges and RTDs as well as bioelectric signals such as ECG and EEG. Specifications include low quiescent current of ±450µA, low offset voltage of ±100µV, low offset drift of 2µV/°C, low noise of 20 nV/root-Hz at 1 kHz, high CMR of 120 dB, low non-linearity error of 0.001% maximum, and input protection of ±40V. Gain can be set from 1V to 10,000V/V with a single external resistor.

About the Author

Staff

Articles, galleries, and recent work by members of Electronic Design's editorial staff.

Sponsored Recommendations

Comments

To join the conversation, and become an exclusive member of Electronic Design, create an account today!