Metering-grade MCU with integrated 24-bit sigma-delta ADC
Its standout feature is the set of four 24-bit sigma-delta analog-to-digital converters integrated on-chip, purpose-built for energy measurement applications where simultaneous sampling of voltage and current phases is required.
Peripheral set for instrumentation and control
Beyond the sigma-delta ADCs, the part includes an 8-channel 10-bit SAR ADC for auxiliary measurements, a DMA controller for moving conversion results without CPU intervention, and a hardware multiplier for accelerating the math behind energy calculations. Brown-out detection and a power-on-reset circuit are built in, reducing external supervisor IC count.
For a BOM line going into a new meter or industrial instrument, this part does not carry the supply-chain risk of an NRND or obsolete device.