4x 24-bit sigma-delta ADC — the reason to pick this part
Four independent 24-bit sigma-delta ADCs let the MSP430I2040TRHBT simultaneously sample voltage and current on multiple phases of a polyphase meter, or monitor four sensor bridges in a weigh-scale or flow-meter. The 24-bit resolution provides the dynamic range to resolve microvolt-level signals in the presence of a large DC offset — useful for shunt-based current sensing where the signal is a few millivolts riding on a common-mode voltage.
Serial interfaces include I²C, SPI, and UART/USART, plus IrDA and SCI — enough for communication with an external EEPROM, a display driver, or a wireless module. The brown-out detect and reset circuit protects against supply dips, and the PWM and watchdog timer handle motor-control timing and system supervision. No CAN or USB is on-chip, so designs needing those protocols require an external bridge.