Renesas R5F523E5LGFP#50

Overview

R5F523E5LGFP#50 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensing and metering applications. It integrates a 24-bit delta-sigma ADC with ±10-V input capability, rail-to-rail programmable gain instrumentation amplifier (gain = 1–128), on-chip excitation current sources (50–1000 µA), 2.5-V low-drift voltage reference (8 ppm/°C), and CAN 2.0B interface - all operating at up to 32 MHz with 128 KB flash and 16 KB SRAM.

For engineers reviewing the R5F523E5LGFP#50 datasheet, R5F523E5LGFP#50 pinout, R5F523E5LGFP#50 application, or R5F523E5LGFP#50 equivalent, this MCU delivers verified 125 kSPS delta-sigma sampling, IEC60730-compliant self-diagnostic features, hardware-accelerated CRC and ELC event linking, and full support for embedded energy metering, load cell interfaces, and isolated sensor signal conditioning without external precision analog front-end components.

Technical Context

The R5F523E5LGFP#50 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU, 64 DMIPS @ 32 MHz, and memory protection unit (MPU) - enabling deterministic real-time control alongside high-resolution analog acquisition. Its dual A/D subsystem comprises an 8-channel 24-bit delta-sigma converter (DSADB) with fourth/fifth-order sinc filtering and simultaneous 50/60 Hz rejection, plus an independent 8-channel 12-bit SAR converter (S12ADE) with 1.4 µs conversion time.

Dedicated analog peripherals include two matched excitation current sources (±0.2% matching, 5 ppm/°C drift), bias voltage generator (VBIAS = (AVCC0 + AVSS0)/2), ±10-V HVAIN pins with disconnect detection, and low-side switch (10 Ω max) for sensor excitation control. Clocking supports main oscillator (1–20 MHz), sub-clock (32.768 kHz), PLL, and IWDT-dedicated oscillator - with CAC for clock accuracy monitoring.

Key Specifications

Pinout & Package

Package: PLQP0100KB-B - 100-pin Low-Profile Quad Flat Package, 14 × 14 mm body, 0.5 mm pitch, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5NDFP#50, the R5F523E5LGFP#50 provides double the DSADB sampling rate and ±10-V input headroom critical for unamplified bridge sensors; versus R5F523E6LGFP#50, it trades flash/RAM capacity and extended temperature rating for lower cost and power in standard industrial environments.

Availability

R5F523E5LGFP#50 is available at Aetrix Electronics and suitable for energy metering, industrial weighing systems, and isolated sensor signal conditioning requiring stable component supply, long-term lifecycle support, and guaranteed D-version (–40°C to +85°C) qualification.

Supply support for R5F523E5LGFP#50 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, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The RX23E-B Group targets high-accuracy measurement applications - integrating metrology-grade analog front-ends, safety-certifiable peripherals, and real-time processing in a single chip to replace discrete sensor interface + MCU architectures.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E5LGFP#50?

The R5F523E5LGFP#50 supports a maximum sampling rate of 125 kSPS for its 24-bit delta-sigma ADC (DSADB) when operating with fMOD = 4 MHz. This rate is achievable with reduced resolution; at full 24-bit effective resolution, the optimal rate is 3.8 SPS. The device offers programmable data rates from 3.8 SPS to 125 kSPS, selectable per channel via configuration registers.

Does R5F523E5LGFP#50 support IEC60730 Class B compliance out of the box?

The R5F523E5LGFP#50 includes dedicated hardware features to support IEC60730 Class B compliance - including self-diagnostic functions for the A/D converter, clock frequency accuracy measurement circuit (CAC), independent watchdog timer (IWDT), RAM test assistance using the DOC, and analog input disconnect detection. Full certification requires system-level implementation and validation, but the R5F523E5LGFP#50 provides the necessary on-chip building blocks.

What are the key differences between R5F523E5LGFP#50 and R5F523E5NDFP#50?

The R5F523E5LGFP#50 and R5F523E5NDFP#50 share identical package (100-pin LFQFP), CPU, and peripheral set, but differ in analog specifications: R5F523E5LGFP#50 supports ±10-V input range and 125 kSPS DSADB sampling, while R5F523E5NDFP#50 is limited to 5-V input and 31.25 kSPS. Both are D-version (–40°C to +85°C) with 128 KB flash and 16 KB RAM.

Can R5F523E5LGFP#50 operate with a single 3.3-V supply across all domains?

Yes - the R5F523E5LGFP#50 operates from a single 1.8–5.5-V VCC supply for digital logic, while AVCC0 must be supplied at 4.5–5.5 V to guarantee full performance of the 12-bit SAR ADC (S12ADE). For applications using only the 24-bit DSADB, AVCC0 may be supplied at 1.8–5.5 V. The device supports flexible power domain partitioning to optimize noise isolation and efficiency.

Which communication interfaces in R5F523E5LGFP#50 support hardware flow control or automatic baud rate detection?

The R5F523E5LGFP#50 SCI modules (SCI0–SCI9, SCI12) support hardware flow control via RTS/CTS signals and include an on-chip baud rate generator with bit-rate modulation capability for robust asynchronous communication. Automatic baud rate detection is not implemented; however, the CAC module enables precise clock accuracy monitoring to maintain timing integrity across temperature and voltage variations.