MMA Note: Also the other problem may be that you need to bypass the buffer for AIN4 - the negative input or to bias this pin up to AGND + 100mV.
Reply: As we mentioned earlier that input buffers have bypassed. So, there is no issue about the biasing of the pin.
- Actually we saw some of the sample ADC circuits.Those are RTD and Thermocouple interfacing circuits.In that they connect the original signal (to which we want the count) to RC low pass filter and gave low pass filter output to ADC channel.
- For that connection I have some doubts which I have listed below:
In RTD for low pass filter they use 10E resitance and In Thermocouple they use10K resistor.
what makes difference between them? and
How can we decide that which resistance we have to use?
please clarify my doubt....
Thank You
P.Hima Bindu