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We always recommend decoupling capacitors in circuits as they have multiple benefits. On top of supplying current during transients, they also filter out noise coming from your power source. Power supply noise can be seen at the output of a device that does not have proper decoupling. In some cases, we have seen it can even result in oscillations. I would like to add that the THS3201 is not recommended for new designs, and we suggest looking into the THS3491 as a potential replacement.
Hi Ignacio, Thanks for your reply. Do you have any suggestions for value of decoupling capacitors? Thanks for mentioning that. could you please let me know what is the reason that you do not recommend this opamp? would it have a very catastrophic effect?
Figure 65 in the THS3201 highlights our EVM schematic for this device and shows the decoupling capacitors used. Figure 3 in the THS3491EVM user's guide highlights the values used for that design. The user's guide can be found here. The reason it is not recommended is because there is a chance we will stop supporting the device. We are still in production for existing customers, but for new designs and continued long-term support we do not recommend implementing the THS3201.
