MSP430FR6047: MSP430FR6007 adjusted the power supply voltage from 2.2V to 3.3V, with a fixed PGA gain of 0.1dB. It was found that the average time difference under static water conditions changed from -1.6ps to 26.5ps.What is the cause of this problem?

Part Number: MSP430FR6047
Other Parts Discussed in Thread: MSP430FR6007

MSP430FR6007 adjusted the power supply voltage from 2.2V to 3.3V, with a fixed PGA gain of 0.1dB. It was found that the average time difference under static water conditions changed from -1.6ps to 26.5ps.What is the cause of this problem?