1-currently we are using ad7799 for our product (weight scale application )
as i read ad7190 datasheet it has better performance (like more free noise bit)
is it good idea to switch ad7799 with ad7190 ?
2- In datasheet pin 9 is nc whereas in evaluation schematic pin 9 is AGND.!
3-when we don't use AINCOM is it ok left it float ?
how about other pins that are unused like AIN1,2 REF2(+,-)?
4- Do you recommend a resistor in series with Reference pins , like what we done in AIN ?
5-As i read in "AD779x Instrumentation Converters Frequently Asked Questions" you have recommended
to use external diodes :
"The Schottky diode must have a turn-on voltage of 300 mV."
It is really hard to find The Schottky with this turn on voltage
do you have any specific offer ?