Sensors & Data Acquisition — question 3 of 10
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Assume you'll handle centering the bipolar signal into the unipolar ADC range separately — just focus on the gain number needed to use the ADC's full span.
A strain-gauge full bridge is excited with a 5V supply and has a rated sensitivity of 2 mV/V, so its differential output swings ±10 mV around zero as you apply the full rated load in both directions. Your ADC has a 0–3.3V single-ended input range and you want to use nearly the full range for best resolution. What gain should your instrumentation amplifier provide?
This one resolves to a number. Give the value in the field below and your reasoning in the box — the number is checked exactly, by arithmetic.