Put Gain Up Front—waxing philosophical

RE: Put Gain Up Front—waxing philosophical

Bruce Trump — Sun, 03 Feb 2013 19:29:06 GMT

MaxO-- For low noise, consider the INA163 or INA103. For excellent CMRR over frequency consider the INA826. The selection of an instrumentation amp (or an op amp, for that matter) can depend on many factors specific to the application. It's probably best to get into your application details in a forum post. --Bruce

RE: Put Gain Up Front—waxing philosophical

MaxO — Sun, 03 Feb 2013 18:08:10 GMT

This all make sense, now, what is the best precision InAmp out there? Let say you don't care about voltage offset since there is filtering circuitry later on, and power consumption is not a problem, so, if you only care about low-noise and high CMRR. I've been using the INA333, does anybody has another favorite?

RE: Put Gain Up Front—waxing philosophical

Ken Dillinger — Mon, 28 Jan 2013 18:56:46 GMT

I was dinged on this concept during an interview. I only knew that it is beneficial to have a higher gain block in front of a cascaded signal chain, but I did not know the technical reason why and I certainly did not know the math behind it. After the interview I scoured the web and now I know it as Frii's Formula.