Part Number: MSP430FR6047
I don't see any A/D input connectors on the EVM board, yet the '6047 data sheet shows a 16 channel, 12bit A/D (delta sigma?) on it. There are a few reference designs for heat meters using this EVM board that have the sensors plug in to the booster pack connections using external ADC devices (or theTMP116 which does its own analog conversion). Why? Is the ADC on the '6047 unsuitable for this purpose?
Also is the temperature measurement needed for the water flow measurement solution? I know that the accuracy of the TOF measurements can depend on knowing the temperature as this affects the density of water and the speed of sound though the medium. But is this a significant factor in the measurement of the flow rate for water in plumbing, or is the possible error factor low enough to be ignored?