Renesas R5F523E6ADNF#U0

Overview

R5F523E6ADNF#U0 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog sensing in industrial measurement systems, featuring dual 24-bit delta-sigma ADCs (DSAD0/DSAD1), rail-to-rail programmable gain instrumentation amplifiers (PGA ×8 gain settings), 2.5 V low-drift voltage reference (10 ppm/°C), four excitation current sources (50–1000 µA), and integrated CAN 2.0B interface. It operates at up to 32 MHz with 256 KB flash, 32 KB SRAM, and 8 KB data flash.

For engineers reviewing the R5F523E6ADNF#U0 datasheet, R5F523E6ADNF#U0 pinout, R5F523E6ADNF#U0 application, or R5F523E6ADNF#U0 equivalent, this MCU targets high-accuracy sensor signal conditioning in temperature, pressure, and load cell applications where simultaneous multi-channel delta-sigma conversion, on-chip excitation, and real-time diagnostics per IEC60730 are required.

Technical Context

The R5F523E6ADNF#U0 integrates two independent 24-bit delta-sigma A/D converters with fourth-order sinc filters, selectable normal/low-power modes (7.6–15625 SPS / 1.9–3906 SPS), and simultaneous 50/60 Hz rejection at 10/54 SPS. Each DSAD unit supports up to six differential inputs with PGA gain ×1 to ×128, offset drift ≤10 nV/°C, and gain drift ≤1 ppm/°C.

Its analog front end includes a dedicated 2.5 V voltage reference (±10 mA drive), bias voltage generator (VBIAS = (AVCC0 + AVSS0)/2), low-side switch (10 Ω max), and four excitation current sources with ±0.2% matching and 5 ppm/°C drift matching - all synchronized via ELC-triggered inter-unit A/D start.

Key Specifications

Pinout & Package

Packaged in 40-pin HWQFN (PWQN0040KD-A), 6 × 6 mm, 0.5 mm pitch, with exposed thermal pad. Pin count and peripheral channel count reduced vs. 48-pin LFQFP variant: 2× SCIg (SCI1, SCI5), 4-channel DSAD differential input, 4-channel S12AD, no SCIh or RSPI.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision analog microcontroller applications.

Compared with R5F523E6ADFL#30, the R5F523E6ADNF#U0 trades peripheral count and DSAD channel depth for smaller footprint and lower PCB area; compared with ADS131M04IPBSR, it eliminates external signal chain components and provides native IEC60730 diagnostics - reducing total system BOM and validation effort.

Availability

R5F523E6ADNF#U0 is available at Aetrix Electronics and suitable for industrial temperature monitoring, high-accuracy pressure transducers, and load cell signal conditioning requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for R5F523E6ADNF#U0 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for industrial, automotive, and IoT applications.

The RX23E-A Group, including R5F523E6ADNF#U0, was designed specifically for high-precision sensor signal acquisition and condition monitoring in industrial automation, with integrated delta-sigma ADCs, excitation sources, and IEC60730 safety features.

FAQ

What is the operating temperature range for the R5F523E6ADNF#U0?

The R5F523E6ADNF#U0 is rated for operation from –40°C to +85°C (D-grade). This range is validated for all integrated peripherals including both 24-bit delta-sigma ADCs, PGAs, voltage reference, and excitation current sources - ensuring full specification compliance across the entire span without derating.

Does the R5F523E6ADNF#U0 support simultaneous sampling across both delta-sigma ADC units?

Yes, the R5F523E6ADNF#U0 supports hardware-synchronized start of conversion for both DSAD0 and DSAD1 using the Event Link Controller (ELC). This enables true simultaneous sampling of two independent sensor channels - critical for phase-sensitive measurements such as motor current/voltage or differential pressure.

What are the key differences between R5F523E6ADNF#U0 and R5F523E6ADFL#30?

The R5F523E6ADNF#U0 uses a 40-pin HWQFN package with reduced peripheral count (2× SCIg, no SCIh or RSPI, 4-channel DSAD differential input), while R5F523E6ADFL#30 uses a 48-pin LFQFP with full peripheral set and 6-channel DSAD input. Core CPU, memory, analog specs, and safety features are identical.

Can the R5F523E6ADNF#U0 perform self-calibration of its delta-sigma ADCs?

Yes, the R5F523E6ADNF#U0 supports on-chip offset and gain error calibration for both DSAD units. Calibration coefficients can be stored in data flash and applied in real time - enabling factory-trimmed accuracy without external calibration equipment during end-product manufacturing.

Is CAN communication supported on the R5F523E6ADNF#U0, and what protocol versions are compliant?

Yes, the R5F523E6ADNF#U0 integrates a single-channel RSCAN module compliant with ISO 11898-1 for CAN 2.0B operation at up to 1 Mbps. It supports both standard (11-bit) and extended (29-bit) frame formats, message filtering, and 16 configurable message boxes - suitable for industrial fieldbus and sensor network applications.