Hi,

I am working on high precision RTU design project.

I am using ADS8431 ADC along with OPA330 as differential amplifier. 

I heard that, differential opamp circuitry (which includes 4 resistors) have more noise as compared to single ended opamp act as buffer which affects SNR, SINAD, SFDR and THD levels.

Can you please validate that my understanding is correct or not?

Is there any tool or application note that can be used to calculate noise induce by differential opamp against single ended?

Thanks and best regards,

Dnyandeep Buwa