measuring negative offsets can be even more painful. Since I do not have the luxury of a negative signal voltage. Is manual measurement and offset feeding in the MCU the only way?Ĩ. A direct measurement of offset through the MCU thus seems of no good as the MCU resolution itself it 2mV, and ofcourse we all know how reliable the LSB of a MCU based ADC is!ħ. The MCU has a 10bit resolution, with a full range of about 2V. Even a 5mV offset is unacceptable, and 2mV amplifiers, though still not readily acceptable, cost almost double!Ħ. I am sensing current, with a full range output of 50mV. I did not understand the concept of making DAC.
There are around 8 op-amps on board and using lower offset amplifier literally doubles the cost.
I just need to determine it so that the MCU 'knows' it.Ģ. Yes, you got it absolutely right, I don't mean to compensate it in real.
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