Renesas R5F523E6KDNF#40

Overview

R5F523E6KDNF#40 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensing applications. It integrates a 24-bit delta-sigma ADC with ±10-V input capability, rail-to-rail programmable gain instrumentation amplifier (gain = 1–128), on-chip excitation current sources (50–1000 µA), and 256 KB flash/32 KB SRAM - all operating at up to 32 MHz. Used in load cell interfaces, weigh scales, and precision process transmitters where low-drift analog front-end performance and IEC60730 compliance are required.

For engineers reviewing the R5F523E6KDNF#40 datasheet, R5F523E6KDNF#40 pinout, R5F523E6KDNF#40 application, or R5F523E6KDNF#40 equivalent, key selection criteria include its 10-V analog input range, 125 kSPS delta-sigma sampling rate, integrated ±10-V HVAIN pins, 2-channel excitation current sources with ±0.2% matching, and support for IEC60730 self-test functions including A/D converter diagnostics and clock accuracy monitoring.

Technical Context

The R5F523E6KDNF#40 implements a dedicated analog subsystem centered on the DSADB module, synchronized to PCLKC (up to 16 MHz), with configurable sinc filters (4th/5th-order) and simultaneous 50/60 Hz rejection at 10/54 SPS. Its analog front end includes two independent excitation current sources, bias voltage generator (VBIAS = (AVCC0 + AVSS0)/2), and voltage reference (2.5 V, 8 ppm/°C drift).

Digital execution relies on the RXv2 CPU core with IEEE 754-compliant FPU, memory protection unit (MPU), and event-driven architecture via ELC - enabling peripheral coordination (e.g., MTU-triggered ADC conversion) without CPU wake-up. Real-time operation is supported by RTC, LPT, and IWDT with dedicated 15-kHz oscillator.

Key Specifications

Pinout & Package

PWQN0040KD-A is a 40-pin HWQFN package (6 × 6 mm, 0.5 mm pitch) with exposed thermal pad, rated for –40°C to +85°C operation. Pin functions are defined per Table 1.4 of R01DS0402EJ0100 Rev.1.00, including 13 I/O pins (2× 5-V tolerant), HVAIN0–HVAIN1 (±10-V analog inputs), AVCC0/AVSS0, VREFH/VREFL, IEXC0/IEXC1, and dedicated reset/debug pins.

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 R5F523E6KDNF#40 delivers essential ±10-V input tolerance for industrial bridge sensors, while versus discrete ADS125H02+MCU solutions, it reduces PCB area and qualification effort by integrating PGA, excitation, reference, and diagnostics into a single AEC-Q100-aligned MCU.

Availability

R5F523E6KDNF#40 is available at Aetrix Electronics and suitable for industrial weigh scales, process transmitters, energy metering nodes, and medical impedance analyzers requiring stable component supply, long-term lifecycle support, and guaranteed -40°C to +85°C operation.

Supply support for R5F523E6KDNF#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 is designed specifically for high-accuracy sensor signal conditioning - integrating precision delta-sigma ADCs, PGAs, excitation sources, and safety-certified firmware frameworks into a single 32-bit MCU platform.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E6KDNF#40?

The R5F523E6KDNF#40 supports a maximum delta-sigma ADC sampling rate of 125 kSPS, achievable with modulator clock fMOD = 4 MHz and appropriate sinc filter configuration. At lower data rates (e.g., 10 or 54 SPS), the R5F523E6KDNF#40 enables simultaneous 50 Hz and 60 Hz line-frequency rejection - critical for industrial environments with mixed AC noise sources.

Does R5F523E6KDNF#40 support IEC60730 Class B compliance out of the box?

Yes, the R5F523E6KDNF#40 includes hardware-assisted IEC60730 Class B features: A/D converter self-test, clock frequency accuracy measurement (CAC), independent watchdog timer (IWDT) diagnostics, RAM test support via Data Operation Circuit (DOC), and analog input disconnect detection - all documented in the R01DS0402EJ0100 datasheet and supported by Renesas' Functional Safety Package.

What are the analog input voltage limits for HVAIN pins on R5F523E6KDNF#40?

The HVAIN0 and HVAIN1 pins on the R5F523E6KDNF#40 accept differential or pseudo-differential signals within a ±10-V range relative to AVSS0. This allows direct interfacing with high-output bridge sensors and eliminates the need for external level-shifting amplifiers - a key differentiator from standard 5-V-input MCUs like the R5F523E6BDNF#40.

Can R5F523E6KDNF#40 operate with a single 3.3-V supply?

Yes, the R5F523E6KDNF#40 operates from a single 1.8-V to 5.5-V supply. At VCC = 3.3 V, it runs at up to 32 MHz (subject to AVCC0 ≥ 4.5 V for full-precision S12AD/DSAD operation). The internal voltage regulators and low-power modes (sleep, deep sleep, software standby) maintain functionality across this range without external LDOs.

How many excitation current sources does R5F523E6KDNF#40 integrate, and what are their key specs?

The R5F523E6KDNF#40 integrates two fully programmable excitation current sources (IEXC0 and IEXC1), each configurable from 50 µA to 1000 µA in six discrete steps. They provide ±0.2% current matching and 5 ppm/°C drift matching - essential for ratiometric measurements in load cells and RTD interfaces where ratio stability determines absolute accuracy.