Renesas R5F523E5ADNF#40

Overview

R5F523E5ADNF#40 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensor systems, featuring dual 24-bit delta-sigma ADCs (DSAD0/DSAD1), rail-to-rail programmable gain instrumentation amplifiers (gain = 1–128), 2.5 V low-drift voltage reference (10 ppm/°C), four excitation current sources (50–1000 µA), and integrated CAN 2.0B interface. It operates at up to 32 MHz with 128 KB flash, 16 KB SRAM, and 8 KB data flash.

For engineers reviewing the R5F523E5ADNF#40 datasheet, R5F523E5ADNF#40 pinout, R5F523E5ADNF#40 application, or R5F523E5ADNF#40 equivalent, this MCU delivers calibrated 23-bit effective resolution at 7.6 SPS, simultaneous 50/60 Hz rejection, on-chip self-diagnostic support for IEC60730 Class B compliance, and ELC-triggered synchronized A/D conversion across both DSAD units - critical for load cell, RTD, and thermocouple signal conditioning.

Technical Context

The R5F523E5ADNF#40 integrates two independent 24-bit delta-sigma A/D converters with fourth-order sinc filters, each supporting up to six differential inputs and programmable data rates (1.9–15625 SPS). Its analog front end includes a 2.5 V ±10 ppm/°C reference, bias voltage generator ((AVCC0 + AVSS0)/2), and four matched excitation current sources with ±0.2% matching and 5 ppm/°C drift.

It implements the RXv2 CPU core with IEEE 754-compliant FPU, memory protection unit (MPU), and event link controller (ELC) enabling interrupt-free inter-module coordination - allowing MTU timers to trigger DSAD conversions while the CPU remains in deep sleep mode, reducing system power during precision acquisition cycles.

Key Specifications

Pinout & Package

Package: 40-pin HWQFN (PWQN0040KD-A), 6 × 6 mm, 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 measurement MCU applications.

Compared with R5F523E5ADNF#40, R5F523E5ADFL#30 offers greater pin count and analog channel capacity in LFQFP, while ADS131M04IPBSR provides higher sampling rate (64 kSPS) but requires external MCU, PGA, reference, and excitation - increasing total solution size and calibration complexity.

Availability

R5F523E5ADNF#40 is available at Aetrix Electronics and suitable for industrial weighing systems, temperature transmitters, smart pressure transmitters, and energy metering sensor nodes requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for R5F523E5ADNF#40 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power solutions for industrial, automotive, and infrastructure markets.

The RX23E-A Group - including R5F523E5ADNF#40 - was designed specifically for high-accuracy sensor signal conditioning in industrial process control, offering integrated delta-sigma ADCs, PGAs, excitation sources, and IEC60730 support in a single chip.

FAQ

What is the maximum effective resolution of the R5F523E5ADNF#40's delta-sigma ADCs?

The R5F523E5ADNF#40 achieves up to 23-bit effective resolution at 7.6 SPS with gain = 1 and full-scale output data rate, verified per datasheet R01DS0330EJ0130 Section 1.1. This performance is enabled by its fourth-order sinc filter, offset/gain calibration, and low-noise PGA (30 nVRMS @ gain=128). The R5F523E5ADNF#40 maintains this specification across its full operating temperature range of –40°C to +85°C.

Does the R5F523E5ADNF#40 support simultaneous sampling across both 24-bit delta-sigma ADC units?

Yes, the R5F523E5ADNF#40 supports synchronized start of conversion for both DSAD0 and DSAD1 using the Event Link Controller (ELC). This capability is documented in Section 1.1 and Figure 1.2 of R01DS0330EJ0130, enabling true simultaneous acquisition for multi-sensor applications like 3-phase current monitoring. The R5F523E5ADNF#40 does not require software coordination or timer interrupts to achieve this timing alignment.

What excitation current source configurations are supported by the R5F523E5ADNF#40?

The R5F523E5ADNF#40 provides four independent excitation current sources (IEXC0–IEXC3) configurable from 50 µA to 1000 µA in discrete steps. Per datasheet Table 1.1 and Section 1.1, it supports either two 1000 µA sources or four 500 µA sources - selectable via register configuration. Matching accuracy is ±0.2% and drift is 5 ppm/°C, making the R5F523E5ADNF#40 suitable for precision 4-wire RTD and load cell measurements.

Can the R5F523E5ADNF#40 operate with a 1.8 V supply voltage?

Yes, the R5F523E5ADNF#40 supports 1.8 V to 5.5 V single-supply operation, but maximum CPU frequency is reduced to 8 MHz at 1.8–2.4 V, per Table 1.1 in R01DS0330EJ0130. At 1.8 V, only the 12-bit SAR ADC (S12ADE) remains functional; the 24-bit delta-sigma ADCs require AVCC0 ≥ 2.7 V. Full analog performance - including DSAD, PGA, and reference - is guaranteed only at VCC ≥ 2.7 V, where the R5F523E5ADNF#40 runs at 32 MHz.

Is the R5F523E5ADNF#40 pin-compatible with other RX23E-A group MCUs?

The R5F523E5ADNF#40 uses the 40-pin HWQFN (PWQN0040KD-A) package and shares identical pin functions and layout with other NF-suffixed RX23E-A variants (e.g., R5F523E6ADNF#20, R5F523E5AGNF#20), as confirmed in Table 1.2 and Figure 1.5 of R01DS0330EJ0130. However, memory size (128 KB flash), temperature grade (–40°C to +85°C), and DSAD channel count (2 units) are fixed for the R5F523E5ADNF#40 and cannot be upgraded via pin-compatible replacement.