アプリケーションノート 1069

High-Gain Signal Conditioning Circuit for Thin and Thick Film Sensors


要約: Sensors that use thin-film or thick-film strain gauge technology typically require high-gain signal conditioning. For typical applications where signal gain of less than 250V/V is sufficient, any of the high precision signal conditioners, MAX1452, and MAX1455 ASICs can be used without any external amplification of the signal. For applications where high-gain compensation (larger than 250V/V) is required, external amplification circuit must me added.

Using the MAX4196 instrumentation amplifier (IA) as a pre-amplification circuit, adds a factor of 10V/V gain to the signal path enabling low output strain gauge sensors to be temperature compensated and calibrated. Complete circuits for high-gain amplification and temperature compensation of such sensors will be presented and discussed.