Renesas RX23E‑A: 32‑bit MCU with Integrated High‑Precision AFE – Zero‑Calibration 0.1% Accuracy

Renesas Electronics has launched the RX23E‑A series of 32‑bit RX microcontrollers, a groundbreaking solution that fuses a high‑precision analog front‑end (AFE) with a powerful MCU on a single die. This integration is specifically engineered for manufacturing, test, and measurement equipment that demands sub‑0.1% precision in analog sensing—temperature, pressure, weight, flow, and more—without the need for calibration.

With industry‑leading AFE performance—offset drift of just 10 nV/°C, gain drift of 1 ppm/°C, and an RMS noise floor of 30 nV—these MCUs deliver the same accuracy that previously required separate A/D converters and precision op‑amps. By employing Renesas’s proven fabrication process across both digital and analog domains, the RX23E‑A eliminates the complexity of multi‑chip designs, shrinking board real estate, reducing component count, and simplifying system architecture for high‑precision measurement applications such as temperature controllers, weighing systems, and force sensors.

Built on the RXv2 core, the RX23E‑A runs at 32 MHz and includes a digital signal processor and a top‑tier floating‑point unit. This makes it ideal for adaptive control algorithms and advanced calculations, such as six‑axis distortion corrections in robotic arm force sensors. A single chip can now capture distortion data and perform inverse matrix computations, a task that once required a separate processor.

The family is offered in compact 48‑pin QFP (7 mm × 7 mm) and 40‑pin QFP (6 mm × 6 mm) packages, ensuring a straightforward footprint for rapid prototyping and production.

Renesas’s RX23E‑A MCUs set a new benchmark for integrated sensor solutions, combining unmatched analog precision with robust digital intelligence—perfect for the next generation of high‑accuracy measurement equipment.