Hello,

I read in AD5412/AD5422 datasheet that adding compensation capacitor reduces the bandwidth of the output amplifier and increase settling time.

Would it be possible to have more quantitative information about the COMP capacitor impact on settling time ?

The best would be a relation as: Settling time = f(CCOMP, Cload).

In my case, th AD5412 drives the resitive +capacitive load: 1kOhm (min.) + 20nF (max.).

What would be the minimum compensation capacitor required ? What would be the maximum settling time induced ?

Thanks in advance for your feedbacks,

Regards,

Jean-Baptiste Osmont

Hi Jean-Baptiste,

We haven't tested the AD5412/22 in all possible load conditions so we can't provide a function to compute for the settling time with respect to the load.

You can refer to the guideline values below to determine the appropriate Ccomp value for a particular max Cload at Vout. Note that these are guidelines, so you will need to determine which is acceptable for your application.

Ccomp Cload (max)No external Ccomp ------------> 20nF

100pF ------------>100nF

200pF ------------>200nF

4nF ------------>1uF

Thanks and best regards,

Rainier