My customer is interested in AD7745/46 and so on using CN0129.
His input capacitance range will be ~ 200pF MAX
Could you gibe me your advice about below my question for input range extension and allowed capacitance to GND.
AD7745/46 Datasheet p.3 says that allowed capacitance to GND in excitation is 100pF MAX.
Does above mean that EXC pin can not connect any sensor which has capacitance over 100pF ?
AD7745/46 datasheet p.8 Figure 11 says capacitance error in capacitance to GND over 100pF
CN0129 P.3 figure 2 says capacitance error about ~ 200pF +- 45pF.
I understand that using any sensor over 100pF affects measurement error but we can use any sensor over 100pF.
Is my understanding correct ?
Please let me know your advice.