MSP430F6735IPZ — 16-bit metrology MCU with dual ADC architecture
The headline feature is the dual ADC set: three 24-bit sigma-delta converters for simultaneous voltage and current channel sampling, plus an eight-channel 10-bit SAR ADC for auxiliary measurements like temperature or neutral current.
What the 3×24-bit ADC means for the BOM
Three independent 24-bit sigma-delta ADCs let this part sample voltage and two current phases simultaneously — exactly what a polyphase energy meter needs. The 24-bit resolution gives enough dynamic range to handle the wide crest factors of mains current waveforms without an external PGA or gain-switching network. The separate 10-bit SAR ADC on the same die handles neutral current or temperature monitoring, so you don't need a second MCU or an external multiplexer for the housekeeping channel.
Peripheral set for instrumentation and HMI
An integrated LCD driver supports segment displays for local readout, and the 72 general-purpose I/O lines handle relay control, tamper switches, and communication interfaces.
Housed in a 100-pin LQFP (14×14 mm body), surface-mount only.