16-bit MCU with integrated precision measurement front-end
The distinguishing feature is the three 24-bit sigma-delta ADCs — these allow direct connection of current and voltage sensors in energy-metering and industrial-analog applications without an external converter. An additional 8-channel 10-bit SAR ADC handles auxiliary measurements.
Three independent 24-bit sigma-delta converters (listed as peripherals) let this single chip replace a separate analog front-end IC in polyphase energy metering, weigh-scale, or flow-meter designs. Each converter can be assigned to a different sensor channel, reducing component count and board area. The 8x10b SAR ADC adds headroom for temperature or voltage monitoring without an external mux. For a design targeting a three-phase power monitor, this MCU eliminates the need for a stand-alone metering AFE, saving roughly $2–$4 in BOM cost per channel.
For a BOM line, this removes the supply-risk flag that comes with NRND or obsolete parts. The base product number MSP430F67641 supports multiple package and temperature variants, so a design can migrate within the family without a PCB layout change if future requirements shift.
Boot, debug, and first-power checklist
The MSP430 CPUXV2 boots from internal Flash with the BOOT0 pin strapped low. The JTAG/SBW debug interface stays alive even with the watchdog enabled, so firmware recovery is straightforward. The internal oscillator is available at power-up, but for the sigma-delta converters to meet their rated accuracy, an external precision clock or crystal should be considered. The 100-LQFP package (14x14 mm) has an exposed thermal pad — ensure the PCB has a via stitch to a ground plane to keep junction temperature under control when the ADC and CPU run continuously.