Renesas R5F523E6MDNF#40

Overview

R5F523E6MDNF#40 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision industrial sensing, featuring a 24-bit delta-sigma ADC with 31.25 kSPS max sampling rate, ±5-V analog input range, 256 KB on-chip flash, 32 KB SRAM, and integrated excitation current sources (50–1000 µA) - deployed in load cell signal conditioning and weigh scale front ends.

For engineers reviewing the R5F523E6MDNF#40 datasheet, R5F523E6MDNF#40 pinout, R5F523E6MDNF#40 application, or R5F523E6MDNF#40 equivalent, this MCU delivers calibrated low-drift analog acquisition (11 nVRMS noise, 4 nV/°C offset drift), CAN 2.0B interface (1 Mbps), and IEC60730-compliant self-test functions for Class B safety-critical measurement systems.

Technical Context

The R5F523E6MDNF#40 implements a CISC Harvard architecture with 5-stage pipeline and variable-length instructions, enabling 64 DMIPS at 32 MHz. Its analog subsystem centers on a single 24-bit delta-sigma A/D converter (DSADB) with fourth- to fifth-order sinc filtering, programmable gain instrumentation amplifier (×1 to ×128), and ±5-V HVAIN input capability.

Digital integration includes an ELC for interrupt-free peripheral coordination, four-channel DMAC, and dual-clock domain operation: ICLK up to 32 MHz for CPU/core, PCLKC up to 16 MHz for DSADB, and dedicated low-speed oscillator for IWDT/LPT. The device omits RTC and LCD controller per its M-suffix configuration.

Key Specifications

Pinout & Package

Packaged in a 40-pin HWQFN (PWQN0040KD-A), 6 × 6 mm, 0.5 mm pitch, with exposed thermal pad. Pin count and I/O allocation match Table 1.2 for 40-pin HV variant: 14 I/O pins, 1 input-only pin, 15 pull-up resistors, 14 open-drain outputs, 2 pins 5-V tolerant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E6BDNF#40, the R5F523E6MDNF#40 reduces DSADB sampling rate to 31.25 kSPS to lower power consumption and cost, while retaining identical excitation sources, PGA, and safety features; versus ADS124S08IRHBT, it integrates processing, memory, and peripherals into one die - eliminating interconnect complexity and improving EMC robustness.

Availability

R5F523E6MDNF#40 is available at Aetrix Electronics and suitable for industrial weighing systems, pressure transmitter modules, energy meter sensor nodes, and medical infusion pump sensors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F523E6MDNF#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 IoT applications.

The RX23E-B Group targets high-accuracy sensor signal conditioning, integrating precision analog front ends with robust MCU cores to replace multi-chip measurement solutions in industrial automation and smart infrastructure.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E6MDNF#40?

The R5F523E6MDNF#40 supports a maximum sampling rate of 31.25 kSPS for its 24-bit delta-sigma A/D converter (DSADB). This rate is achieved with a 4 MHz modulator clock and fourth-order sinc filtering. It is specifically configured for high-resolution static or quasi-static measurements such as load cell and pressure sensor readouts where noise rejection and stability outweigh raw speed requirements.

Does R5F523E6MDNF#40 include an integrated voltage reference for the delta-sigma ADC?

Yes, the R5F523E6MDNF#40 includes an on-chip 2.5 V voltage reference (VREF) with 8 ppm/°C temperature drift over –40°C to +85°C and ±10 mA output capability. This reference can be used directly by the DSADB or bypassed in favor of an external reference applied to DSAD_VREFP/DSAD_VREFN - enabling both ratiometric and absolute measurement configurations in the R5F523E6MDNF#40.

How many excitation current sources does R5F523E6MDNF#40 provide, and what are their key specifications?

The R5F523E6MDNF#40 provides two fully programmable excitation current sources (IEXC0 and IEXC1) with output ranges from 50 µA to 1000 µA in six discrete steps. Key specs include ±0.2% current matching between channels and 5 ppm/°C drift matching - critical for maintaining bridge balance in precision strain gauge applications. These sources are internally connected to the analog multiplexer and support disconnect detection.

Is the realtime clock (RTC) available in R5F523E6MDNF#40?

No, the R5F523E6MDNF#40 does not include a realtime clock (RTC) module. Per Table 1.2 in the datasheet, RTC functionality is omitted in all 40-pin HWQFN variants of the RX23E-B Group, including R5F523E6MDNF#40. This omission aligns with its target use cases - static industrial sensing - where calendar/time-of-day tracking is unnecessary and board space/power are constrained.

What communication interfaces are supported by R5F523E6MDNF#40 for industrial fieldbus connectivity?

The R5F523E6MDNF#40 supports CAN 2.0B (1 Mbps), six SCI channels (asynchronous/clock-synchronous/smart card), one I2C bus interface (400 kbps), and one RSPI channel (16 Mbps). For industrial fieldbus use, CAN is the primary interface - directly compatible with standard CAN transceivers and widely adopted in factory automation and building management systems where the R5F523E6MDNF#40 is deployed.