16-bit metering MCU with integrated sigma-delta ADC
The MSP430I2041TPWR: Communication interfaces include I²C, IrDA, SCI, SPI, and UART/USART, giving flexibility for isolated data links to a host processor or display module. On-chip peripherals cover brown-out detect/reset, PWM outputs, and a watchdog timer. The device operates from a 2.2 V to 3.6 V supply and is rated over the -40°C to 105°C industrial temperature range, making it suitable for outdoor cabinet and engine-bay environments where thermal cycling is a factor.
4x24-bit sigma-delta ADC — what it means for the BOM
The four 24-bit sigma-delta converters are the headline feature of this part. They enable simultaneous sampling of voltage and current channels in a polyphase energy meter, eliminating the need for a separate analogue-to-digital converter IC and its associated reference and anti-aliasing filter components. For a three-phase meter, the four channels cover three voltage and one neutral current input, or three current and one voltage input, depending on the topology. The 24-bit resolution provides the dynamic range needed to measure both standby power (milliamps) and full-load current through the same shunt or current transformer, without gain switching.
Lifecycle and sourcing reality
The MSP430I2041TPWR carries an EOL hot lifecycle flag, indicating that Texas Instruments has initiated end-of-life planning for this device. Buyers should verify the last-time-buy schedule and consider qualifying a replacement before the final order window closes.
Package and mounting
Supplied in a 28-pin TSSOP package (0.173" body width, 4.40 mm) for surface-mount assembly. The supplier device package is 28-TSSOP. The tape-and-reel variant (TR suffix) is suited for automated pick-and-place; cut-tape (CT) is available for prototyping or low-volume builds. The 12 I/O pins plus the four ADC inputs share the 28-pin count, so pin allocation should be reviewed against the target application's sensor interface and communication needs before layout.