Renesas R5F523E6ADNF#40

Overview

R5F523E6ADNF#40 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensor systems. It integrates two 24-bit delta-sigma ADCs (DSAD0/DSAD1), rail-to-rail programmable gain instrumentation amplifiers (gain = 1–128), a 2.5 V low-drift voltage reference (10 ppm/°C), four excitation current sources (50–1000 µA), and a 12-bit SAR ADC - all operating at up to 32 MHz with 256 KB flash, 32 KB SRAM, and 8 KB data flash.

For engineers reviewing the R5F523E6ADNF#40 datasheet, R5F523E6ADNF#40 pinout, R5F523E6ADNF#40 application, or R5F523E6ADNF#40 equivalent, this MCU is selected for embedded metrology where simultaneous high-resolution analog acquisition, on-chip signal conditioning, IEC60730 safety support, and CAN bus connectivity are required in compact 40-pin HWQFN packaging.

Technical Context

The R5F523E6ADNF#40 implements a CISC Harvard architecture with 5-stage pipeline and variable-length instructions, delivering 64 DMIPS at 32 MHz. Its dual 24-bit delta-sigma ADCs feature fourth-order sinc filters, simultaneous 50/60 Hz rejection, and inter-unit synchronized start - enabling precise multi-channel weight or temperature sensing without external timing coordination.

On-chip analog front-end resources include independent PGA paths per DSAD unit, selectable reference inputs (internal 2.5 V or external), bias voltage generation ((AVCC0 + AVSS0)/2), and low-side switch (10 Ω) for sensor excitation control. The MCU supports IEC60730 self-test via A/D disconnect detection, RAM test assistance, and clock accuracy measurement (CAC).

Key Specifications

Pinout & Package

Packaged in a 40-pin HWQFN (PWQN0040KD-A), the R5F523E6ADNF#40 features 20 general-purpose I/O pins with 5-V tolerance, open-drain capability, and pull-up resistors. Analog resources are allocated across dedicated AIN0–AIN11, REF0P/REF0N, REF1P/REF1N, REFOUT, IEXC0–IEXC3, LSW, AVCC0, and AVSS0 pins - enabling full analog signal chain implementation without external multiplexers or buffers.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E6ADNF#40, the R5F523E6ADFL#30 offers expanded I/O and communication resources in a larger package, while the ADS124S08IRHBT provides higher analog integration density but requires an external processor - making the R5F523E6ADNF#40 optimal for cost-sensitive, space-constrained embedded metrology nodes needing self-contained firmware execution.

Availability

R5F523E6ADNF#40 is available at Aetrix Electronics and suitable for industrial weighing systems, temperature monitoring nodes, smart pressure transmitters, and energy metering subsystems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for R5F523E6ADNF#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 manufacturer specializing in microcontrollers, analog, and power solutions for industrial, automotive, and IoT applications.

The RX23E-A Group - including the R5F523E6ADNF#40 - was designed specifically for high-accuracy sensor signal conditioning and metrology, integrating precision analog front-ends with robust real-time MCU capabilities in a single chip.

FAQ

What is the maximum operating frequency and CPU architecture of the R5F523E6ADNF#40?

The R5F523E6ADNF#40 operates at a maximum frequency of 32 MHz using the 32-bit RXv2 CPU core with CISC Harvard architecture and 5-stage pipeline. It delivers 64 DMIPS performance and includes a single-precision IEEE754-compliant FPU, 32-bit multiplier, and divider - enabling efficient floating-point sensor linearization and digital filtering directly on the R5F523E6ADNF#40.

How many delta-sigma ADC channels does the R5F523E6ADNF#40 support, and what is their effective resolution?

The R5F523E6ADNF#40 integrates two independent 24-bit delta-sigma ADC units (DSAD0 and DSAD1), each supporting up to 6 differential or 11 single-ended inputs. At 7.6 SPS with gain = 1, each achieves 23-bit effective resolution - verified in the datasheet for precision applications such as Class I load cells and high-accuracy RTD measurement on the R5F523E6ADNF#40.

Does the R5F523E6ADNF#40 include integrated excitation current sources, and what are their specifications?

Yes, the R5F523E6ADNF#40 includes four programmable excitation current sources (IEXC0–IEXC3) with output ranges from 50 µA to 1000 µA in six discrete steps. They provide ±0.2% current matching and ±5 ppm/°C drift matching - critical for accurate 3- and 4-wire RTD measurements. These sources are fully controllable in firmware and usable with the R5F523E6ADNF#40's integrated PGAs and reference voltage.

What package type and pin count does the R5F523E6ADNF#40 use, and how does it differ from the 48-pin variant?

The R5F523E6ADNF#40 uses a 40-pin HWQFN package (PWQN0040KD-A, 6 × 6 mm, 0.5 mm pitch) with –40°C to +85°C operating range. Compared to the 48-pin LFQFP R5F523E6ADFL#30, it has fewer analog inputs (4 vs. 6 differential DSAD channels), two fewer SCI channels (2 vs. 3), and no IRQ7 pin - but retains identical core analog performance, flash/SRAM size, and CAN functionality for compact R5F523E6ADNF#40 implementations.

What safety-related features does the R5F523E6ADNF#40 provide for IEC60730 compliance?

The R5F523E6ADNF#40 includes hardware-assisted IEC60730 compliance features: A/D converter disconnect detection, clock frequency accuracy measurement circuit (CAC), independent watchdog timer (IWDT) with dedicated 15-kHz oscillator, RAM test assistance via DOC, and self-diagnostic functions for the 12-bit SAR ADC. These reduce software validation effort and enable Class B certification for the R5F523E6ADNF#40 in safety-critical sensor applications.