Renesas R5F523E6ADNF#20

Overview

R5F523E6ADNF#20 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensor systems, featuring dual 24-bit delta-sigma ADCs (DSAD0/DSAD1), rail-to-rail programmable gain instrumentation amplifiers (gain = 1–128), 2.5 V low-drift voltage reference (10 ppm/°C), four excitation current sources (50–1000 µA), and CAN 2.0B interface compliant to ISO11898-1 at up to 1 Mbps.

For engineers reviewing the R5F523E6ADNF#20 datasheet, R5F523E6ADNF#20 pinout, R5F523E6ADNF#20 application, or R5F523E6ADNF#20 equivalent, this device supports IEC60730-compliant diagnostics, simultaneous 50/60 Hz rejection, inter-unit synchronized A/D start, and BGO data flash programming - critical for thermocouple, RTD, and load cell signal conditioning in smart transmitters and process controllers.

Technical Context

The R5F523E6ADNF#20 integrates two independent 24-bit delta-sigma A/D converters with fourth-order sinc filters, each supporting differential inputs (up to 6 channels per unit), programmable data rates (1.9–15625 SPS), and offset/gain calibration. Its analog front end includes a dedicated bias voltage generator (VBIAS = (AVCC0 + AVSS0)/2) and low-side switch (10 Ω max) for sensor excitation control.

It executes at 32 MHz using the RXv2 CPU core with FPU (IEEE754 single-precision), MPU, and ELC-driven event-triggered peripheral operation - enabling low-power sensor acquisition during CPU sleep. The 40-pin HWQFN package (PWQN0040KD-A, 6 × 6 mm, 0.5 mm pitch) supports 4-channel differential DSAD input and 4-channel 12-bit SAR ADC (S12ADE), matching Table 1.2 specifications for the NF variant.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E6ADNF#20, R5F523E6ADFL#30 provides expanded analog channel count in a larger package, while ADS131M04IPBSR delivers higher integration density for ADC-only functions but lacks embedded processing, diagnostics, and communication peripherals - making R5F523E6ADNF#20 optimal for compact, self-contained sensor nodes requiring functional safety support.

Availability

R5F523E6ADNF#20 is available at Aetrix Electronics and suitable for industrial process transmitters, smart load cell controllers, energy metering sensor nodes, and condition monitoring modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F523E6ADNF#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 delivering trusted embedded design innovation for automotive, industrial, infrastructure, and IoT applications.

The RX23E-A Group - including R5F523E6ADNF#20 - was designed specifically for high-accuracy sensor signal conditioning in industrial automation, targeting thermocouple, RTD, and strain gauge measurement with integrated diagnostics and functional safety support.

FAQ

What is the maximum effective resolution of the delta-sigma ADC in R5F523E6ADNF#20?

The R5F523E6ADNF#20 achieves up to 23-bit effective resolution in its 24-bit delta-sigma A/D converters when operating at 7.6 SPS with gain = 1. This specification is measured under typical conditions and accounts for noise, linearity, and drift - enabling precision measurement for RTD and thermocouple applications without external signal conditioning. The R5F523E6ADNF#20 maintains this performance across its –40°C to +85°C operating range.

Does R5F523E6ADNF#20 support simultaneous sampling across both DSAD units?

Yes, the R5F523E6ADNF#20 supports inter-unit A/D conversion synchronized start, allowing both DSAD0 and DSAD1 to begin conversion simultaneously via software trigger or ELC event. This capability ensures time-aligned acquisition from multiple sensor domains - such as temperature and pressure - critical for dynamic system analysis. The R5F523E6ADNF#20 implements this using shared control registers and hardware synchronization signals within the analog subsystem.

What are the supported excitation current values on R5F523E6ADNF#20?

The R5F523E6ADNF#20 provides four programmable excitation current sources (IEXC0–IEXC3) with six discrete output levels: 50 µA, 100 µA, 250 µA, 500 µA, 750 µA, and 1000 µA. Current matching is ±0.2% and drift matching is 5 ppm/°C, ensuring consistent sensor biasing across channels. These settings are configured via the IEXC register set in the R5F523E6ADNF#20's analog control block.

Can R5F523E6ADNF#20 operate in software standby mode while maintaining analog monitoring?

Yes, the R5F523E6ADNF#20 supports software standby mode with the low-power timer (LPT) active, enabling periodic wake-up for analog measurements without full CPU initialization. During standby, DSAD units remain powered and can be triggered via LPT overflow or external event through ELC. This feature reduces average system power to <100 µA while preserving measurement readiness - a key capability of the R5F523E6ADNF#20 for battery-operated sensor nodes.

Is R5F523E6ADNF#20 qualified for IEC60730 Class B compliance?

The R5F523E6ADNF#20 includes hardware-assisted self-test features required for IEC60730 Class B, including RAM test support via DOC, A/D converter disconnect detection, clock frequency accuracy measurement (CAC), and independent watchdog timer (IWDT) diagnostics. While the MCU itself provides the building blocks, final Class B certification depends on system-level implementation and validation per IEC60730-1 Annex H. Renesas supplies application notes and diagnostic libraries to accelerate R5F523E6ADNF#20-based certification.