Renesas R5F523E5MDNF#20

Overview

R5F523E5MDNF#20 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 A/D converter with 31.25 kSPS max sampling rate, ±5-V input range, on-chip excitation current sources (50–1000 µA), rail-to-rail programmable gain instrumentation amplifier (gain = 1–128), and 128-KB flash/16-KB SRAM. It operates at up to 32 MHz across –40°C to +85°C and targets load cell, pressure transducer, and weigh scale front-end systems.

For engineers reviewing the R5F523E5MDNF#20 datasheet, R5F523E5MDNF#20 pinout, R5F523E5MDNF#20 application, or R5F523E5MDNF#20 equivalent, key selection criteria include its 31.25 kSPS delta-sigma ADC performance at ±5 V, integrated PGA and excitation sources for bridge sensor conditioning, CAN 2.0B interface compliance, and HWQFN-40 package suitability for space-constrained industrial modules.

Technical Context

The R5F523E5MDNF#20 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU, memory protection unit (MPU), and event link controller (ELC) enabling low-latency peripheral coordination without CPU intervention. Its analog subsystem centers on the DSADB module, synchronized to PCLKC (up to 16 MHz), with configurable sinc filters and simultaneous 50/60 Hz rejection at 10/54 SPS.

It supports three low-power modes-sleep, deep sleep, and software standby-with LPT operating during standby using sub-clock or IWDT oscillator. Clock generation includes PLL (4–8 MHz input), main oscillator (1–20 MHz), and dedicated IWDT oscillator, with CAC for real-time clock accuracy monitoring.

Key Specifications

Pinout & Package

PWQN0040KD-A is a 40-pin HWQFN package (6 × 6 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Table 1.4 of R01DS0402EJ0100 Rev.1.00, including dedicated HVAIN pins for ±5-V analog inputs, IEXC outputs for excitation sourcing, and CANH/CANL differential pair.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5BDNF#20 and ADUCM360BCPZ-RL7, the R5F523E5MDNF#20 delivers optimal balance of integrated analog precision, deterministic real-time control via ELC/MTU, and industrial connectivity - reducing layout complexity while maintaining IEC 60730 compliance without external safety co-processors.

Availability

R5F523E5MDNF#20 is available at Aetrix Electronics and suitable for industrial sensor interfaces, weigh scale controllers, and pressure transducer signal conditioning requiring stable component supply, long-term lifecycle assurance, and guaranteed –40°C to +85°C operation.

Supply support for R5F523E5MDNF#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 applications.

The RX23E-B Group - including R5F523E5MDNF#20 - was designed specifically for high-accuracy sensor measurement systems requiring integrated delta-sigma ADCs, excitation sources, and functional safety features in compact packages.

FAQ

What is the maximum sampling rate supported by the 24-bit delta-sigma ADC in R5F523E5MDNF#20?

The R5F523E5MDNF#20 supports a maximum delta-sigma ADC sampling rate of 31.25 kSPS, as specified in Table 1.3 of R01DS0402EJ0100 Rev.1.00 for the "M" variant. This rate applies to the DSADB module with modulator clock fMOD = 4 MHz and is validated for ±5-V input range operation in the PWQN0040KD-A package.

Does R5F523E5MDNF#20 include a real-time clock (RTC) module?

No, the R5F523E5MDNF#20 does not include an RTC module. Per Table 1.2 of R01DS0402EJ0100 Rev.1.00, RTC functionality is explicitly marked as "Not supported" for all 40-pin HWQFN variants (including NF package), regardless of D/G temperature grade. The device retains LPT and IWDT for timekeeping in low-power contexts.

What analog input voltage range is supported by R5F523E5MDNF#20?

The R5F523E5MDNF#20 supports a ±5-V analog input range on its HVAIN pins, consistent with its "M" suffix designation in Figure 1.1. It does not support ±10-V input - that capability is reserved for "K" and "L" variants. The ±5-V range is fully compatible with standard industrial bridge sensors and strain gauges.

Is the R5F523E5MDNF#20 pin-compatible with other RX23E-B group members in the same package?

Yes, all RX23E-B devices in the PWQN0040KD-A (40-pin HWQFN) package share identical pinouts and footprint, including R5F523E5MDNF#20, R5F523E5BDNF#20, and R5F523E5KDNF#20. This allows hardware reuse across variants differing only in ADC speed, input range, or feature set - verified in Table 1.4 and Figure 1.1 of the datasheet.

What communication interfaces are available on R5F523E5MDNF#20?

The R5F523E5MDNF#20 provides CAN 2.0B (1 channel), six SCIg channels (asynchronous/clock-synchronous/smart card), one RIIC (I²C/SMBus), one RSPI (SPI master/slave), and one SCIh (LIN protocol support). It omits RTC, LCD, and the seventh SCI channel found in larger-package variants.