Renesas R5F523E5SDFL#50

Overview

R5F523E5SDFL#50 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial temperature sensing systems, integrating one 24-bit delta-sigma A/D converter (DSAD), a 12-bit SAR ADC, rail-to-rail programmable gain instrumentation amplifier (PGA) with gains up to ×128, 2.5-V low-drift voltage reference, and four excitation current sources (50–1000 µA). It operates at 32 MHz, supports –40°C to +85°C, and features CAN, SCI, I²C, and RSPI interfaces.

For engineers reviewing the R5F523E5SDFL#50 datasheet, R5F523E5SDFL#50 pinout, R5F523E5SDFL#50 application, or R5F523E5SDFL#50 equivalent, this MCU delivers calibrated 23-bit effective resolution at 7.6 SPS, simultaneous 50/60 Hz rejection, on-chip self-diagnostic functions for IEC60730 compliance, and ELC-triggered synchronized A/D conversion - critical for thermocouple and RTD signal conditioning in programmable logic controllers and sensor transmitters.

Technical Context

The R5F523E5SDFL#50 implements a CISC Harvard architecture with 5-stage pipeline and variable-length instructions, enabling 64 DMIPS at 32 MHz. Its dual A/D subsystem includes one 24-bit delta-sigma converter (DSAD0) with fourth-order sinc filter, programmable data rates (1.9–15625 SPS), and offset/gain calibration, plus a 12-bit SAR converter (S12ADE) with 1.4-µs conversion time per channel.

It integrates an event link controller (ELC) that enables hardware-triggered A/D start, timer synchronization, and inter-module coordination without CPU intervention, alongside a memory protection unit (MPU), single-precision IEEE754 FPU, and low-power software standby mode with active low-power timer (LPT).

Key Specifications

Pinout & Package

Package: 48-pin LFQFP (PLQP0048KB-B), 7 × 7 mm body, 0.5 mm pitch, exposed pad not specified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5ADFL#30, R5F523E5SDFL#50 reduces component count and PCB area by integrating MCU, AFE, and communication peripherals in one die, while ADS131M04IPBSR shifts design burden to external firmware and adds isolation/synchronization challenges.

Availability

R5F523E5SDFL#50 is available at Aetrix Electronics and suitable for industrial temperature transmitters, PLC analog input modules, smart sensor nodes, and energy meter front-end controllers requiring stable component supply, long-lifecycle support, and guaranteed D-grade (-40°C to +85°C) operation.

Supply support for R5F523E5SDFL#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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for industrial, automotive, and IoT applications.

The RX23E-A Group - including R5F523E5SDFL#50 - was designed specifically for high-accuracy sensor signal conditioning in industrial automation, featuring integrated delta-sigma A/D, excitation sources, and IEC60730 safety functions.

FAQ

What is the maximum effective resolution of the delta-sigma A/D converter in R5F523E5SDFL#50?

The R5F523E5SDFL#50 achieves up to 23-bit effective resolution at 7.6 SPS with gain = 1 and full-scale input. This value is measured under specified conditions (AVCC0 = 5.0 V, PGA bypassed, sinc4 filter, normal mode) and includes noise, linearity, and drift contributions - confirmed in Renesas R01DS0330EJ0130 Rev.1.30, Section 1.1, Table 1.1.

Does R5F523E5SDFL#50 support simultaneous sampling across multiple analog inputs?

Yes, R5F523E5SDFL#50 supports inter-unit A/D conversion synchronized start between its single 24-bit DSAD unit and the 12-bit S12ADE, enabling time-aligned acquisition of temperature and auxiliary signals. Hardware triggering via ELC ensures sub-microsecond skew - detailed in Section 1.1, "24-bit delta-sigma A/D converter" and "12-bit A/D converter" of R01DS0330EJ0130.

What are the excitation current source specifications for RTD measurement in R5F523E5SDFL#50?

R5F523E5SDFL#50 provides four excitation current sources (IEXC0–IEXC3) with programmable output from 50 µA to 1000 µA in six discrete steps. Matching is ±0.2% and drift matching is 5 ppm/°C - enabling accurate 3- and 4-wire RTD measurements without external precision current sources, as specified in Section 1.1, "Analog front end (AFE)" of R01DS0330EJ0130.

Can R5F523E5SDFL#50 operate in low-power modes while maintaining analog monitoring?

Yes, R5F523E5SDFL#50 supports software standby mode where the CPU halts but the low-power timer (LPT), DSAD, and voltage detectors remain active. The LPT uses the dedicated IWDT oscillator (15 kHz) and can trigger periodic A/D conversions - enabling µA-level sleep current with autonomous sensor polling, per Section 1.1, "Low power consumption functions".

Is R5F523E5SDFL#50 qualified for IEC60730 Class B compliance?

R5F523E5SDFL#50 includes hardware-assisted self-test features required for IEC60730 Class B: RAM test assistance via DOC, A/D converter disconnect detection, clock frequency accuracy measurement (CAC), and independent watchdog timer (IWDT) diagnostics. These are documented in Section 1.1, "Useful functions for IEC60730 compliance" of R01DS0330EJ0130.