Energy-metering MCU with three 16-bit sigma-delta ADCs
The Texas Instruments MSP430F47183IPZ is a 16-bit MCU from the MSP430x4xx series, clocked at 16 MHz with 116 KB Flash and 8 KB RAM. Its standout feature is the three 16-bit sigma-delta ADCs, purpose-built for polyphase energy metering — each ADC can sample a voltage and current channel simultaneously, so a single chip handles the full three-phase measurement chain. The integrated LCD controller drives a segment display directly, and the 72 I/O lines cover utility-meter front panels and industrial control interfaces. Rated for -40°C to 85°C, it fits outdoor meter enclosures and factory-floor controllers.
Three 16-bit ADCs — what that means for the metrology loop
The three 16-bit sigma-delta ADCs sample three voltage and three current channels in a single conversion cycle.
Memory and peripheral fit for a BOM line
116 KB of Flash and 8 KB of RAM are sized for a metrology firmware stack that includes the energy calculation library, communication protocol stack (I²C, SPI, UART, LIN, IrDA), and a segment LCD driver. The 72 I/O lines cover the meter's front-panel buttons, LED indicators, and tamper-detection inputs. The internal oscillator eliminates an external crystal for the CPU clock, though the ADCs still benefit from an external precision reference for best accuracy.