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. Rated for -40 to 85 °C, it fits outdoor telecom cabinets and factory-floor controllers.
25 MHz core — what it buys the design
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.
Lifecycle and sourcing reality
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. We source and quote this part to order against an RFQ through our independent distribution network; availability and current pricing are confirmed at quote time.
Package and mounting
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.