How is the best possible configuration for IDAC (7 or 8 bits) and gain in PSOC-4M, in order to maximize transition speed, considering that manual just mention max 10us? If I consider an external opamp instead of a simple resistor, it may affect the performance of the IDAC?
The factor that is going to affect are supply rails. The currents are rated within 600mV within the respective power rails. That should be taken care