Polyphase metering MCU with seven sigma-delta ADCs
The Texas Instruments MSP430F6778AIPEU is a 16-bit MSP430 CPUXV2 microcontroller running at 25 MHz, packing 512 KB of Flash and 16 KB of RAM. Its headline feature is the set of seven 24-bit sigma-delta analog-to-digital converters — purpose-built for polyphase energy metering, power-quality monitoring, and multi-channel industrial sensor acquisition. The 90 I/O lines and connectivity suite (I²C, SPI, UART, LINbus, IrDA) let it talk to metrology AFEs, communication modules, and display drivers on the same board.
The 25 MHz CPUXV2 clock is enough to run the metrology firmware loop (filter, accumulate, compensate) while the sigma-delta converters sample continuously. For comparison, the 8 MHz MSP430F2xx parts would struggle to service seven simultaneous 24-bit channels without dropping samples — this part's speed margin keeps the timing closure clean.
The MSP430F6778AIPEU carries an end-of-life hot status. That means the manufacturer's last-time-buy window is active or imminent — once it closes, supply shifts to surplus and independent channels. If this part is on a BOM that still needs production runs, secure allocation now or qualify a pin-compatible sibling from the MSP430F6xx family before the LTB deadline passes.
Housed in a 128-LQFP (20×14 mm body), surface-mount. Route sigma-delta analog inputs away from switching digital lines to keep noise out of the 24-bit conversion path.