Renesas R5F523E5SDNF#40

Overview

R5F523E5SDNF#40 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog sensing in industrial temperature measurement systems, integrating two 24-bit delta-sigma ADCs (1 unit), a rail-to-rail programmable gain instrumentation amplifier (gain = 1–128), 128 KB flash, 16 KB SRAM, and CAN 2.0B interface operating at up to 1 Mbps. It supports –40°C to +85°C operation and delivers 64 DMIPS at 32 MHz.

For engineers reviewing the R5F523E5SDNF#40 datasheet, R5F523E5SDNF#40 pinout, R5F523E5SDNF#40 application, or R5F523E5SDNF#40 equivalent, this MCU is selected for thermocouple/RTD signal conditioning where low-noise AFE, on-chip excitation current sources (50–1000 µA), and IEC60730-compliant self-diagnostic features are required.

Technical Context

The R5F523E5SDNF#40 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU, 5-stage CISC Harvard pipeline, and memory protection unit (MPU). Its analog subsystem centers on one 24-bit delta-sigma ADC unit with fourth-order sinc filter, simultaneous 50/60 Hz rejection, and offset/gain calibration - all synchronized via ELC-triggered conversion start.

It integrates dedicated analog resources including a 2.5 V ±10 ppm/°C voltage reference, bias voltage generator (VBIAS = (AVCC0 + AVSS0)/2), four excitation current sources (±0.2% matching), and low-side switch (10 Ω max) - all co-located with dual PGA inputs and 12-bit SAR ADC (1.4 µs conversion) for hybrid signal acquisition.

Key Specifications

Pinout & Package

40-pin HWQFN (PWQN0040KD-A), 6 × 6 mm body, 0.5 mm pitch, exposed thermal pad. Pin functions validated per Renesas R01DS0330EJ0130 Rev.1.30 datasheet, pages 11–13.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5SDNF#40, R5F523E5ADNF#20 doubles delta-sigma channel count for parallel sensor processing, while R5F523E5SGNF#20 extends thermal reliability for harsh environments - neither offers pin compatibility, but both share identical peripheral register mapping and toolchain support.

Availability

R5F523E5SDNF#40 is available at Aetrix Electronics and suitable for industrial temperature transmitters, smart RTD sensor nodes, thermocouple conditioners, and multi-sensor gateways requiring stable component supply and long-term production continuity.

Supply support for R5F523E5SDNF#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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for industrial, automotive, and IoT markets.

The RX23E-A Group - including R5F523E5SDNF#40 - was designed specifically for high-accuracy industrial sensing applications requiring integrated AFE, functional safety compliance, and robust real-time control.

FAQ

What is the maximum operating frequency and CPU performance of the R5F523E5SDNF#40?

The R5F523E5SDNF#40 operates at a maximum frequency of 32 MHz and delivers 64 DMIPS using the 32-bit RXv2 CPU core. It includes an IEEE 754-compliant single-precision FPU, 32-bit multiply-accumulate instructions, and a 5-stage pipeline - enabling deterministic real-time execution for sensor fusion and control algorithms within the R5F523E5SDNF#40.

How many delta-sigma ADC units does the R5F523E5SDNF#40 integrate, and what is their effective resolution?

The R5F523E5SDNF#40 integrates one 24-bit delta-sigma ADC unit supporting up to six differential inputs. At 7.6 SPS with gain = 128, it achieves 23-bit effective resolution and 30 nVRMS input-referred noise. Its fourth-order sinc filter enables simultaneous 50 Hz/60 Hz rejection, and offset/gain calibration is supported in hardware - all confirmed in the R5F523E5SDNF#40 datasheet Section 1.4.

Does the R5F523E5SDNF#40 support IEC60730 functional safety compliance?

Yes, the R5F523E5SDNF#40 includes dedicated hardware features for IEC60730 Class B compliance: A/D converter disconnect detection, clock frequency accuracy measurement circuit (CAC), independent watchdog timer (IWDT) self-test, RAM test assistance via DOC, and analog input fault detection. These are documented in the R5F523E5SDNF#40 datasheet Section "Useful functions for IEC60730 compliance" and require no external components.

What package type and pin count does the R5F523E5SDNF#40 use?

The R5F523E5SDNF#40 uses a 40-pin HWQFN package (Renesas code PWQN0040KD-A), measuring 6 × 6 mm with 0.5 mm pitch and an exposed thermal pad. This package is confirmed in Table 1.3 and Figure 1.5 of the R5F523E5SDNF#40 datasheet R01DS0330EJ0130 Rev.1.30, and supports the full peripheral set except for two SCIg channels and two DSAD differential inputs present in the 48-pin variant.

Can the R5F523E5SDNF#40 drive RTD sensors directly, and what excitation current options are available?

Yes, the R5F523E5SDNF#40 integrates four programmable excitation current sources (IEXC0–IEXC3) with output settings from 50 µA to 1000 µA, ±0.2% matching, and 5 ppm/°C drift matching. Combined with its low-side switch (LSW, 10 Ω on-resistance) and rail-to-rail PGA, it supports direct 2-, 3-, and 4-wire RTD interfacing - eliminating external current sources and reducing layout sensitivity in the R5F523E5SDNF#40 design.