Renesas R5F523E5MGNF#40

Overview

R5F523E5MGNF#40 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensor nodes and smart transmitters. It integrates a 24-bit delta-sigma ADC with 31.25 kSPS max sampling rate, ±5-V analog input range, dual excitation current sources (50–1000 µA), rail-to-rail programmable gain instrumentation amplifier (gain = 1–128), and on-chip 2.5-V voltage reference (8 ppm/°C drift). It operates at up to 32 MHz across –40°C to +105°C and targets applications requiring IEC 60730-compliant diagnostics.

For engineers reviewing the R5F523E5MGNF#40 datasheet, R5F523E5MGNF#40 pinout, R5F523E5MGNF#40 application, or R5F523E5MGNF#40 equivalent, key selection criteria include its 31.25 kSPS delta-sigma ADC performance, 5-V analog input capability, HWQFN-40 package footprint, integrated excitation current sources for bridge sensors, and support for CAN, SCI, and RSPI interfaces in a single-chip solution.

Technical Context

The R5F523E5MGNF#40 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU, memory protection unit (MPU), and event link controller (ELC) enabling interrupt-free peripheral coordination. Its analog subsystem centers on the DSADB unit with fourth- and fifth-order sinc filters, simultaneous 50/60 Hz rejection at 10/54 SPS, and ±10-µV offset drift (gain = 64–128).

Digital integration includes a 1-channel CAN module compliant with ISO 11898-1 (up to 1 Mbps), 7-channel SCI (including LIN-capable SCIh), 1-channel RSPI (16 Mbps), and 1-channel I²C (400 kbps). Power management supports three low-power modes, software standby with active LPT, and supply operation from 1.8 V to 5.5 V.

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, supporting 13 general-purpose I/O pins (5-V tolerant, open-drain capable), dedicated analog inputs (HVAIN0–HVAIN1), excitation current outputs (IEXC0–IEXC1), reference voltage pins (VREFH/VREFL), and core power/ground domains (VCC, AVCC0, AVSS0, VSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5KGNF#40, the R5F523E5MGNF#40 trades ±10-V input capability for tighter layout compatibility with 5-V sensor ecosystems; versus R5F523E5MDNF#40, it offers identical functionality but optimized for flexible procurement and prototyping workflows.

Availability

R5F523E5MGNF#40 is available at Aetrix Electronics and suitable for industrial process transmitters, smart load cell interfaces, and condition monitoring nodes requiring stable component supply, long-term lifecycle assurance, and guaranteed –40°C to +105°C operation.

Supply support for R5F523E5MGNF#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 global semiconductor leader specializing in microcontrollers, analog, and power solutions for industrial, automotive, and infrastructure markets.

The RX23E-B Group, including the R5F523E5MGNF#40, was designed specifically for high-accuracy sensor signal conditioning in industrial automation-integrating precision delta-sigma ADCs, excitation sources, and functional safety features into a single MCU die.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in the R5F523E5MGNF#40?

The R5F523E5MGNF#40 supports a maximum delta-sigma ADC sampling rate of 31.25 kSPS, achieved with modulator clock fMOD = 4 MHz and appropriate sinc filter configuration. This rate applies to the M-variant part number and is confirmed in Table 1.3 of R01DS0402EJ0100 Rev.1.00. Lower rates (e.g., 3.8 SPS) enable higher effective resolution and simultaneous 50/60 Hz rejection.

Does the R5F523E5MGNF#40 include an integrated voltage reference, and what is its accuracy?

Yes, the R5F523E5MGNF#40 integrates a 2.5-V voltage reference with ±0.5% initial accuracy and 8 ppm/°C temperature drift over –40°C to +85°C. This reference is used by the 24-bit DSAD and 12-bit S12AD converters and can also be output externally. The specification is documented in Section 1.1 "Outline of Specifications" (Page 5) of the datasheet.

Can the R5F523E5MGNF#40 drive a 350-Ω strain gauge directly, and how is excitation configured?

Yes, the R5F523E5MGNF#40 includes two programmable excitation current sources (IEXC0/IEXC1) that deliver 50–1000 µA with ±0.2% matching and 5 ppm/°C drift. For a 350-Ω gauge, 1000 µA yields 350 mV full-scale, compatible with the ±5-V HVAIN input range. Configuration is performed via the AFEA register set, and excitation is synchronized with DSAD conversion via ELC or software trigger.

What communication interfaces are available on the R5F523E5MGNF#40, and which support LIN protocol?

The R5F523E5MGNF#40 provides CAN (1 channel), SCI (7 channels total), RSPI (1 channel), and I²C (1 channel). Among SCI modules, only SCI12 (labeled SCIh in documentation) supports LIN protocol framing, including start frame detection and automatic checksum generation. SCI0–SCI9 (SCIg) support standard UART, SPI-like clock sync, and smart card modes-but not native LIN.

Is the R5F523E5MGNF#40 qualified for IEC 60730 Class B compliance, and what self-test features does it include?

Yes, the R5F523E5MGNF#40 includes hardware-assisted IEC 60730 Class B diagnostic features: DSAD offset/gain calibration, clock frequency accuracy measurement (CAC), independent watchdog timer (IWDT) test, RAM test assistance via DOC, and analog input disconnect detection. These are explicitly listed under "Useful functions for IEC60730 compliance" in the datasheet's Features section (Page 1).