Renesas R5F523E5KDNF#00

Overview

R5F523E5KDNF#00 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 ±10-V input capability, rail-to-rail programmable gain instrumentation amplifier (gain = 1–128), 128-KB flash, 16-KB SRAM, and CAN 2.0B interface - all operating at up to 32 MHz. Used in load cell signal conditioning, precision weigh scales, and bridge sensor front ends.

For engineers reviewing the R5F523E5KDNF#00 datasheet, R5F523E5KDNF#00 pinout, R5F523E5KDNF#00 application, or R5F523E5KDNF#00 equivalent, key selection criteria include its 10-V HVAIN input range, 125 kSPS max delta-sigma sampling rate, integrated excitation current sources (50–1000 µA), low-drift voltage reference (2.5 V, 8 ppm/°C), and support for IEC60730 safety diagnostics.

Technical Context

The R5F523E5KDNF#00 implements the RXv2 CPU core with IEEE 754-compliant single-precision FPU, memory protection unit (MPU), and event link controller (ELC) enabling interrupt-free peripheral coordination. Its analog subsystem centers on the DSADB module, synchronized to PCLKC (≤16 MHz), with fourth- and fifth-order sinc digital filters and simultaneous 50/60 Hz rejection at 10/54 SPS.

Power management includes three low-power modes (sleep, deep sleep, software standby), a low-power timer (LPT) running off the sub-clock oscillator, and supply monitoring via three independent LVD circuits. Clock generation supports main (1–20 MHz), sub (32.768 kHz), and on-chip oscillators, with PLL output up to 32 MHz.

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 HVAIN0–HVAIN1 (±10-V analog inputs), VREFH/VREFL, IEXC0/IEXC1, DSAD_CLK, and CANH/CANL.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5KDFM and R5F523E5KGNF, the R5F523E5KDNF#00 delivers identical high-precision analog measurement capability in the smallest 40-pin HWQFN package at the standard industrial temperature grade - making it the most space- and cost-efficient choice for non-display, non-extended-temp applications.

Availability

R5F523E5KDNF#00 is available at Aetrix Electronics and suitable for industrial weigh scales, load cell interfaces, RTD transmitters, and bridge sensor diagnostic modules requiring stable component supply and long-term production continuity.

Supply support for R5F523E5KDNF#00 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 the R5F523E5KDNF#00 - was designed specifically for high-accuracy, low-drift analog measurement in industrial sensing, featuring integrated delta-sigma ADCs, excitation sources, and IEC60730 safety support.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E5KDNF#00?

The R5F523E5KDNF#00 supports a maximum delta-sigma ADC sampling rate of 125 kSPS at lower resolution settings. At full 24-bit effective resolution, the achievable rate is 3.8 SPS (with gain = 1, output data rate = 3.8 SPS). The device allows programmable trade-offs between resolution, data rate, and noise via sinc filter configuration and modulator clock selection.

Does R5F523E5KDNF#00 support ±10-V analog inputs, and how are they implemented?

Yes, the R5F523E5KDNF#00 supports ±10-V analog inputs via dedicated HVAIN0 and HVAIN1 pins. These pins connect directly to the internal delta-sigma ADC's front end and include hardware fault detection for overvoltage, disconnection, and reference anomalies - eliminating need for external protection or level-shifting circuitry in bridge sensor applications.

What safety features does R5F523E5KDNF#00 provide for IEC60730 compliance?

The R5F523E5KDNF#00 includes hardware-assisted safety features for IEC60730 Class B compliance: self-diagnostic routines for the A/D converter, clock frequency accuracy measurement circuit (CAC), independent watchdog timer (IWDT), RAM test assistance using the data operation circuit (DOC), and analog input disconnect detection - all accessible via documented firmware libraries.

Can R5F523E5KDNF#00 operate with a 5-V supply, and what are the voltage requirements for its analog sections?

The R5F523E5KDNF#00 operates from a 1.8-V to 5.5-V VCC supply, supporting full 32-MHz operation at VCC ≥ 2.7 V. For analog functionality, AVCC0 must be 4.5–5.5 V to guarantee full DSAD and S12AD performance; however, the 12-bit ADC can operate down to 1.8 V when only that peripheral is active - enabling flexible mixed-supply designs.

Is the R5F523E5KDNF#00 pin-compatible with other RX23E-B group MCUs in the same package?

Yes, all RX23E-B MCUs in the PWQN0040KD-A (40-pin HWQFN) package - including R5F523E5BDNF, R5F523E5KDNF, R5F523E5MDNF, and their G-version counterparts - share identical pinouts and mechanical footprint. Function allocation (e.g., HVAIN vs. standard AIN) is determined by part number variant (K/B/M suffix), not pin position.