Renesas R5F523E6BDFM#50

Overview

R5F523E6BDFM#50 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensing applications. It integrates a 24-bit delta-sigma ADC with 125 kSPS max sampling rate, ±5-V input range, rail-to-rail programmable gain instrumentation amplifier (gain = 1–128), on-chip 2.5-V voltage reference (8 ppm/°C drift), and dual excitation current sources (50–1000 µA). Designed for load cell, pressure sensor, and weigh scale front ends operating from –40°C to +85°C.

For engineers reviewing the R5F523E6BDFM#50 datasheet, R5F523E6BDFM#50 pinout, R5F523E6BDFM#50 application, or R5F523E6BDFM#50 equivalent, this MCU delivers calibrated high-resolution analog acquisition with integrated signal conditioning, real-time digital filtering, and IEC60730-compliant self-test functions - critical for Class A/B safety-critical sensor nodes requiring <100 nV/°C offset drift and <1 ppm/°C gain drift stability.

Technical Context

The R5F523E6BDFM#50 implements a dedicated analog subsystem centered on its DSADB unit, synchronized to PCLKC (up to 16 MHz), with fourth- and fifth-order sinc digital filters supporting simultaneous 50/60 Hz rejection at 10/54 SPS. Its AFE includes two independent excitation current sources with ±0.2% matching and 5 ppm/°C drift matching, plus bias voltage generation at (AVCC0 + AVSS0)/2.

CPU operation runs at up to 32 MHz (64 DMIPS) using the RXv2 core with FPU, MPU, and ELC-driven event-triggered peripheral coordination - enabling low-latency, interrupt-free ADC conversion start, D/A update, and timer synchronization without CPU wake-up, essential for deterministic low-power sensor firmware.

Key Specifications

Pinout & Package

Package: PLQP0064KB-C - 64-pin LFQFP, 10 × 10 mm, 0.5 mm pitch, lead-free, RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E6KDFM#50, the R5F523E6BDFM#50 omits HVAIN support but retains identical timing, filtering, and excitation performance for ±5-V systems - reducing BOM cost where high-voltage inputs are unused. Versus ADUCM360, it offers superior real-time peripheral orchestration (ELC), higher max sampling rate (125 kSPS vs. 2.4 kSPS), and native CAN 2.0B compliance for industrial network integration.

Availability

R5F523E6BDFM#50 is available at Aetrix Electronics and suitable for industrial weigh scales, pressure transmitters, load cell conditioners, and energy meter front ends requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F523E6BDFM#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, and power solutions for industrial, automotive, and IoT markets - with deep expertise in high-precision mixed-signal SoCs.

The RX23E-B Group targets industrial sensor signal conditioning, integrating metrology-grade analog peripherals with robust real-time processing and functional safety features - designed specifically for Class A/B IEC60730-compliant measurement systems.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E6BDFM#50?

The R5F523E6BDFM#50 supports a maximum sampling rate of 125 kSPS for its 24-bit delta-sigma ADC (DSADB). This rate is achievable with reduced effective resolution and simplified filtering; for full 24-bit effective resolution, the datasheet specifies 3.8 SPS at gain = 1. The device also supports selectable data rates from 3.8 SPS to 125 kSPS using configurable modulator clock and sinc filter settings.

Does R5F523E6BDFM#50 include an LCD controller?

No, the R5F523E6BDFM#50 does not include an LCD controller. Per the part number decoding in Figure 1.1 of the datasheet, the "B" suffix indicates the absence of the LCD driver. This distinguishes it from "J" and "L" variants (e.g., R5F523E6JDFP) which integrate the LCDC module. The R5F523E6BDFM#50 is optimized for compact sensor signal conditioning without display requirements.

What analog input voltage range is supported by R5F523E6BDFM#50?

The R5F523E6BDFM#50 supports a ±5-V analog input range via its HVAIN-capable pins. However, as a "B"-variant part, the high-voltage analog input functionality is disabled - meaning only the standard ±5-V range (not ±10-V) is operational. This is confirmed in Table 1.3 and Figure 1.1, where "B" denotes "up to 5-V analog input range, LCD driver not included."

Can R5F523E6BDFM#50 operate with a single 3.3-V supply?

Yes, the R5F523E6BDFM#50 operates with a single 3.3-V supply. Its VCC supply range is 1.8 V to 5.5 V, and at 3.3 V, it supports maximum CPU operation at 32 MHz (per power supply vs. frequency table on page 6). AVCC0 must be supplied at 4.5–5.5 V for full 12-bit ADC performance, but the 24-bit delta-sigma ADC remains functional at lower AVCC0 voltages with adjusted specifications.

What safety certifications or self-test features does R5F523E6BDFM#50 provide for IEC60730 compliance?

The R5F523E6BDFM#50 includes multiple hardware-assisted functions for IEC60730 Class B compliance: ADC offset/gain error calibration, clock frequency accuracy measurement (CAC), independent watchdog timer (IWDT) diagnostics, RAM test assistance via the Data Operation Circuit (DOC), and analog input disconnect detection. These are explicitly listed under "Useful functions for IEC60730 compliance" in the datasheet's Features section.