44.6.16 Performance vs. Power Consumption
It is possible to tradeoff speed versus power efficiency to get the shortest possible propagation delay or the lowest power consumption.
The speed setting is configured for each amplifier individually by the Bias Control field in the Operational Amplifier x Control register (OPAMPCTRLx.BIAS). The BIAS bits select the amount of bias current provided to the operational amplifiers. This will also affect the start-up time.