Renesas R5F523E5MGNF#20

Overview

R5F523E5MGNF#20 from Renesas is a 32-bit RXv2 core MCU optimized for high-precision industrial sensing, featuring a 24-bit delta-sigma A/D converter with 31.25 kSPS max sampling rate, ±5-V analog input range, 128-KB on-chip flash, 16-KB SRAM, and integrated excitation current sources (50–1000 µA) - deployed in load cell signal conditioning and weigh scale front ends.

For engineers reviewing the R5F523E5MGNF#20 datasheet, R5F523E5MGNF#20 pinout, R5F523E5MGNF#20 application, or R5F523E5MGNF#20 equivalent, key selection criteria include its 31.25 kSPS delta-sigma ADC performance at ±5 V full-scale, 40-pin HWQFN package with HVAIN support, CAN 2.0B interface, and IEC60730-compliant self-test features for Class B safety certification.

Technical Context

The R5F523E5MGNF#20 implements the RXv2 CPU core with 32 MHz max operation (64 DMIPS), single-precision FPU (IEEE 754), and memory protection unit (MPU) - enabling deterministic real-time control in sensor fusion and closed-loop industrial measurement systems. Its clock system integrates PLL, sub-clock (32.768 kHz), and dedicated IWDT oscillator for robust timing across sleep modes.

It integrates two independent A/D subsystems: a 24-bit delta-sigma converter (DSADB) with fourth/fifth-order sinc filters, programmable gain instrumentation amplifier (PGA ×1–×128), and ±5-V HVAIN inputs; plus an 8-channel 12-bit S12AD with 1.4 µs conversion time - both synchronized via ELC for event-triggered acquisition without CPU intervention.

Key Specifications

Pinout & Package

Packaged in a 40-pin HWQFN (PWQN0040KD-A), the R5F523E5MGNF#20 features 13 general-purpose I/O pins (5-V tolerant), 2 HVAIN pins for ±5-V analog inputs, 2 IEXC pins for excitation current output, AVCC0/AVSS0 power rails, and dedicated DSAD reference pins (VREFH/VREFL). The package supports reflow soldering and offers thermal pad for enhanced heat dissipation in continuous measurement applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5KGNF#20, the R5F523E5MGNF#20 trades ±10-V input capability and 4× higher DSADB sampling rate for lower cost and adequate resolution in ±5-V industrial sensing. Against R5F523E5MDNF#20, it differs only in packaging - tray vs. tape - with identical silicon functionality and qualification.

Availability

R5F523E5MGNF#20 is available at Aetrix Electronics and suitable for industrial weigh scales, pressure transmitters, temperature-controlled test equipment, and multi-sensor data loggers requiring stable component supply across extended product lifecycles.

Supply support for R5F523E5MGNF#20 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 over 40 years of embedded systems expertise.

The RX23E-B Group, including the R5F523E5MGNF#20, was designed specifically for high-accuracy industrial measurement applications - integrating precision analog front-ends, safety-certifiable firmware features, and real-time processing in compact packages.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in the R5F523E5MGNF#20?

The R5F523E5MGNF#20 supports a maximum sampling rate of 31.25 kSPS for its 24-bit delta-sigma A/D converter (DSADB). This rate is achieved with a 4-MHz modulator clock and applies to configurations using fourth-order sinc filtering. At lower data rates (e.g., 10 SPS), the device enables simultaneous 50/60 Hz rejection for stable measurements in electrically noisy environments.

Does the R5F523E5MGNF#20 include an integrated voltage reference for the delta-sigma ADC?

The R5F523E5MGNF#20 does not integrate a precision voltage reference for the DSADB - instead, it provides VREFH and VREFL pins to accept an external reference, enabling ratiometric measurement with its on-chip excitation current sources. An internal 2.5-V reference is available for other analog blocks (e.g., 12-bit S12AD), but DSADB requires external reference for optimal accuracy and flexibility.

Can the R5F523E5MGNF#20 operate with a single 3.3-V supply across all domains?

Yes, the R5F523E5MGNF#20 supports single-supply operation from 1.8 V to 5.5 V on VCC, and AVCC0 can operate from 1.8 V to 5.5 V when only the 12-bit S12AD is active. For full DSADB functionality, AVCC0 must be ≥4.5 V. At 3.3 V, the MCU runs at up to 32 MHz with no wait states, and all peripherals - including CAN, SCI, and DSADB - remain fully operational with appropriate decoupling.

How many excitation current sources does the R5F523E5MGNF#20 provide, and what are their key specifications?

The R5F523E5MGNF#20 provides two independent excitation current sources (IEXC0 and IEXC1), each programmable from 50 µA to 1000 µA in six discrete steps. They feature ±0.2% current matching and 5 ppm/°C drift matching - enabling highly accurate, temperature-stable biasing of Wheatstone bridge sensors without external precision current DACs or matched resistor networks.

Is the R5F523E5MGNF#20 qualified for IEC60730 Class B compliance?

Yes, the R5F523E5MGNF#20 includes hardware-assisted IEC60730 Class B compliance features: self-diagnostic functions for the A/D converter (offset/gain error, disconnect detection), clock frequency accuracy measurement circuit (CAC), independent watchdog timer (IWDT) supervision, and RAM test assistance via the data operation circuit (DOC) - reducing software validation burden for safety-critical industrial applications.