Renesas R5F523E5SGNF#20

Overview

R5F523E5SGNF#20 from Renesas is a 32-bit RXv2 core MCU optimized for high-precision industrial sensor measurement, integrating two 24-bit delta-sigma ADCs (DSAD), rail-to-rail programmable gain instrumentation amplifiers (PGA), 2.5 V low-drift voltage reference, four excitation current sources (50–1000 µA), and CAN 2.0B interface. It operates at up to 32 MHz, supports –40°C to +105°C, and targets thermocouple/RTD-based temperature monitoring systems requiring IEC 60730 compliance.

For engineers reviewing the R5F523E5SGNF#20 datasheet, R5F523E5SGNF#20 pinout, R5F523E5SGNF#20 application, or R5F523E5SGNF#20 equivalent, this page delivers verified technical context, validated pin functions for the 40-pin HWQFN package, real-world analog front-end design values, and confirmed alternative MCUs with documented functional trade-offs in sensor signal chain integration.

Technical Context

The R5F523E5SGNF#20 implements a dual 24-bit delta-sigma A/D converter architecture with fourth-order sinc filtering, simultaneous 50/60 Hz rejection at 10/54 SPS, and offset/gain calibration per channel. Its analog front end includes two independent PGAs (gain ×1 to ×128), excitation current sources with ±0.2% matching, and low-side switch (10 Ω max) for 4-wire RTD biasing.

Digital subsystem features include a 32-bit RXv2 CPU core delivering 64 DMIPS at 32 MHz, on-chip FPU (IEEE 754 single-precision), memory protection unit (MPU), and event link controller (ELC) enabling timer-triggered DSAD conversion without CPU wake-up - critical for low-power sensor node operation.

Key Specifications

Pinout & Package

Package: 40-pin HWQFN (PWQN0040KD-A), 6 × 6 mm body, 0.5 mm pitch, exposed thermal pad (pin 40 = VSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5ADNF#20, the R5F523E5SGNF#20 adds guaranteed operation to +105°C and retains identical analog performance; versus ADS124S08IRHBT, it integrates full signal chain + processing + CAN in one die, reducing BOM count and layout complexity by ~12 components.

Availability

R5F523E5SGNF#20 is available at Aetrix Electronics and suitable for industrial temperature transmitters, high-accuracy weigh scale controllers, and motor drive current sensing systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F523E5SGNF#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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for industrial, automotive, and IoT applications.

The RX23E-A Group is designed specifically for high-precision sensor measurement, integrating metrology-grade analog peripherals with robust MCU functionality to replace multi-chip sensor signal chains in industrial automation and energy metering.

FAQ

What is the maximum operating frequency and CPU performance of the R5F523E5SGNF#20?

The R5F523E5SGNF#20 operates at a maximum frequency of 32 MHz using its 32-bit RXv2 core, delivering 64 DMIPS of processing performance. Its architecture includes a 5-stage pipeline, variable-length instructions, and hardware floating-point unit compliant with IEEE 754 - enabling efficient execution of sensor linearization, digital filtering, and communication stack tasks without external co-processors. This performance level is sustained across the full –40°C to +105°C operating range.

Does the R5F523E5SGNF#20 support simultaneous 50 Hz and 60 Hz noise rejection in its delta-sigma ADC?

Yes, the R5F523E5SGNF#20's dual 24-bit delta-sigma ADCs support simultaneous 50 Hz and 60 Hz rejection at specific output data rates: 10 SPS and 54 SPS. This capability is implemented in hardware via the fourth-order sinc filter and requires no firmware intervention. It is particularly valuable in industrial environments with mixed AC power standards, ensuring stable temperature or pressure readings without software-based notch filtering.

What are the excitation current source specifications for RTD measurement on the R5F523E5SGNF#20?

The R5F523E5SGNF#20 provides four programmable excitation current sources (IEXC0–IEXC3) with output levels selectable from 50 µA to 1000 µA in six discrete steps. Current matching is ±0.2%, and drift matching is 5 ppm/°C - critical for accurate 3- and 4-wire RTD measurements. These sources can be routed to any of the 12 analog input pins via the analog multiplexer, and their operation is synchronized with DSAD conversion triggers through the ELC.

How does the R5F523E5SGNF#20 support IEC 60730 functional safety compliance?

The R5F523E5SGNF#20 includes hardware-assisted IEC 60730 compliance features: built-in RAM test support via the Data Operation Circuit (DOC), A/D converter disconnect detection, clock frequency accuracy measurement (CAC), independent watchdog timer (IWDT) with dedicated oscillator, and voltage detector (VDET) for analog supply monitoring. These reduce software certification burden by offloading diagnostic routines to dedicated peripherals - confirmed in Renesas' Functional Safety Manual R01US0094EJ0100.

What package type and pin count does the R5F523E5SGNF#20 use?

The R5F523E5SGNF#20 uses a 40-pin HWQFN package (Renesas designation PWQN0040KD-A), measuring 6 × 6 mm with 0.5 mm pitch and an exposed thermal pad (pin 40 = VSS). This compact, thermally enhanced package supports high-density industrial PCB layouts while maintaining analog signal integrity - distinct from the 48-pin LFQFP variant used in higher-pin-count RX23E-A models.