Renesas R5F523E6NDFP#50

Overview

R5F523E6NDFP#50 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensing and metering applications. It integrates a 24-bit delta-sigma ADC with 31.25 kSPS max sampling rate, ±5-V input range, 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. The device operates at up to 32 MHz and supports IEC60730 functional safety compliance.

For engineers reviewing the R5F523E6NDFP#50 datasheet, R5F523E6NDFP#50 pinout, R5F523E6NDFP#50 application, or R5F523E6NDFP#50 equivalent, key selection considerations include its 100-pin LFQFP package, 31.25 kSPS delta-sigma ADC performance, integrated ±5-V analog front end, CAN 2.0B interface, and support for low-power software standby mode with LPT operation.

Technical Context

The R5F523E6NDFP#50 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU, 64 DMIPS @ 32 MHz, and memory protection unit (MPU). Its analog subsystem centers on the DSADB module - a 24-bit delta-sigma ADC with fourth- and fifth-order sinc filters, simultaneous 50/60 Hz rejection at 10/54 SPS, and ±5-V HVAIN input capability.

Digital integration includes one CAN channel (ISO 11898-1, up to 1 Mbps), six SCI interfaces, one RSPI (16 Mbps), one RIIC (400 kbps), ELC-driven event-triggered conversions, and DTC/DMAC for zero-CPU-load data movement. Clock management supports main oscillator (1–20 MHz), sub-clock (32.768 kHz), PLL, and dedicated IWDT oscillator.

Key Specifications

Pinout & Package

Package: PLQP0100KB-B - 100-pin Low-profile Quad Flat Package, 14 mm × 14 mm, 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 measurement applications.

Compared with R5F523E6NDFP#50, R5F523E6LDFP#50 extends analog input range and sampling rate for demanding transducer interfaces, while R5F523E5NDFP#50 reduces memory capacity without compromising ADC performance or peripheral set - enabling tiered product variants within the same hardware platform.

Availability

R5F523E6NDFP#50 is available at Aetrix Electronics and suitable for industrial flow metering, energy monitoring systems, smart pressure transmitters, and industrial weigh scale controllers requiring stable component supply and long-term production continuity.

Supply support for R5F523E6NDFP#50 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 and metrology, integrating precision analog front ends with robust real-time processing and functional safety features for industrial automation and smart infrastructure.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E6NDFP#50?

The R5F523E6NDFP#50 supports a maximum delta-sigma ADC sampling rate of 31.25 kSPS. This rate is achieved with the modulator clock set to 4 MHz and appropriate sinc filter configuration. At lower data rates (e.g., 10 or 54 SPS), the device provides simultaneous 50 Hz/60 Hz rejection for AC-coupled industrial environments - a capability confirmed in the R01DS0402EJ0100 datasheet Section 1.1.

Does R5F523E6NDFP#50 include an LCD controller?

No, R5F523E6NDFP#50 does not include an LCD controller. Per Figure 1.1 and Table 1.3 in the R01DS0402EJ0100 datasheet, the "N" suffix denotes the 31.25 kSPS / ±5-V analog variant *without* LCD driver functionality. Devices with LCD support use suffixes "J", "L", or "K". This omission reduces die size and power consumption for applications where display output is handled externally.

What are the supported excitation current values for RTD measurement on R5F523E6NDFP#50?

R5F523E6NDFP#50 provides two independent excitation current sources (IEXC0/IEXC1) with programmable output values of 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 - enabling high-accuracy ratiometric RTD measurements without external calibration. These specifications are documented in Section 1.1, Table 1.1 (Analog Front End).

Is R5F523E6NDFP#50 qualified for IEC60730 Class B compliance?

Yes, R5F523E6NDFP#50 includes hardware-assisted self-diagnostic features required for IEC60730 Class B, including ADC self-test, clock frequency accuracy measurement (CAC), independent watchdog timer (IWDT) diagnostics, RAM test support via DOC, and analog input disconnect detection. These capabilities are explicitly listed under "Useful functions for IEC60730 compliance" in the datasheet's Features section.

What is the operating voltage requirement for the analog supply (AVCC0) on R5F523E6NDFP#50?

R5F523E6NDFP#50 requires AVCC0 to be supplied at 4.5–5.5 V for full operation of the 24-bit delta-sigma ADC, PGA, excitation current sources, and voltage reference. While the digital core (VCC) operates from 1.8–5.5 V, the analog subsystem is specified only for 4.5–5.5 V per Table 1.1 (Power supply voltages/Operating frequencies) - ensuring noise immunity and specification compliance for precision measurement.