16-bit metering MCU with seven sigma-delta ADCs
The MSP430F6779AIPEUR integrates seven 24-bit sigma-delta ADCs for polyphase energy metering and power-quality monitoring. Connectivity includes I²C, IrDA, LINbus, SPI, and UART/USART interfaces.
No pin-compatible second source or direct replacement is listed in the official records, but the MSP430F6xx family includes multiple density and peripheral variants for scalability within a common toolchain.
What the 7x24-bit sigma-delta ADC means for your BOM
The seven 24-bit sigma-delta converters are the primary reason to select this MCU over a general-purpose 16-bit part. They eliminate the need for an external multichannel ADC and the associated analog front-end components in three-phase energy meters, power analyzers, and precision weigh-scale or strain-gauge systems. Each converter runs independently, allowing simultaneous sampling of voltage and current phases. The 24-bit resolution provides the dynamic range needed for Class 0.2 or better metering accuracy without external gain stages. For a BOM cost engineer, this integration collapses a multi-IC analog chain into a single MCU, reducing board area and procurement complexity.
The 128-LQFP package with 0.5 mm pitch is a standard surface-mount footprint, compatible with conventional reflow profiles. The 90 I/O pins provide ample headroom for parallel LCD interfaces, keypad matrices, and sensor arrays without needing a port expander.