The 16-bit core keeps the code density tight compared to an 8-bit part, but the real differentiator is the integrated 4x24-bit sigma-delta ADC and the LCD controller — this chip is designed for a specific job: polyphase energy metering, flow measurement, or any precision instrumentation that needs a direct LCD readout and multiple high-resolution analog channels.
Peripheral set — sigma-delta ADC and LCD driver onboard
Four 24-bit sigma-delta converters let you sample voltage and current from multiple phases simultaneously, which is the core requirement for a Class 0.2 energy meter. The LCD driver supports segment displays up to 196 segments, so you can drive a local readout without an external display controller. The 62 GPIOs give plenty of room for tamper detection, relay control, and opto-isolated pulse outputs. Brown-out reset and POR are built in, so the supply supervisor count on the BOM stays at zero.
Internal oscillator means one less external component, though a precision crystal is still advisable if the sigma-delta ADC needs tight line-frequency tracking.
Package and rework considerations
Housed in a 100-pin LQFP with a 14x14 mm body and 0.5 mm pitch. The exposed pad is on the bottom — it needs a thermal via stitch under the part to pull heat into the ground plane. It reflows fine with a standard profile, and the 0.5 mm pitch is inspectable under a microscope. MSL 3 out of the bag — bake before reflow if the moisture barrier pouch has been open past the floor-life window.