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I am using a Microchip MCP6N11 chopper stabilized instrumentation amplifier to amplify the signal from a MPX2300DT1 Wheatstone bridge pressure sensor. My schematic is attached. As shown the gain is 170. To get enough signal I need to increase it to at least 800.

According to the datasheet this may require too high a value of feedback resistor. In the datasheet there is a formula for the maximum feedback resistor:

Gain

I'm not sure what values to use for fGBWP and CG.

Can I safely get a gain of 800 to 1000 out of this type of instrumentation amplifier or should I add a second stage of amplification? Frequency response only needs to go up to about 10,000 Hz.

This is my schematic:

schematic

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migrated from engineering.stackexchange.com Aug 16 '18 at 2:34

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