Renesas R5F523E5BGFL#50

Overview

R5F523E5BGFL#50 from Renesas is a 32-bit RXv2 core MCU optimized for high-precision analog measurement in industrial sensor nodes and metering systems, featuring a 24-bit delta-sigma ADC (125 kSPS, ±10-V input), rail-to-rail programmable gain instrumentation amplifier (gain = 1–128), on-chip excitation current sources (50–1000 µA), 128-KB flash, 16-KB SRAM, and CAN 2.0B interface compliant to ISO11898-1 at up to 1 Mbps.

For engineers reviewing the R5F523E5BGFL#50 datasheet, R5F523E5BGFL#50 pinout, R5F523E5BGFL#50 application, or R5F523E5BGFL#50 equivalent, this device supports IEC60730-compliant self-diagnostic functions for A/D converters, clock accuracy monitoring, RAM testing, and analog fault detection - critical for Class B safety certification in energy meters, load cells, and industrial transmitters.

Technical Context

The R5F523E5BGFL#50 integrates a dedicated analog front-end (AFEA) with dual reference paths: internal 2.5-V voltage reference (8 ppm/°C drift) and external ±10-V HVAIN inputs routed through low-drift PGA (11 nVRMS, 4 nV/°C offset drift). Its DSAD module operates synchronously with PCLKC (≤16 MHz) and supports four sinc-based digital filters for simultaneous 50/60 Hz rejection at 10/54 SPS.

It implements event-driven operation via the Event Link Controller (ELC), enabling autonomous ADC conversion triggering, PWM waveform generation, and timer synchronization without CPU intervention - essential for ultra-low-power wake-up sequences in battery-backed sensor nodes operating across –40°C to +105°C.

Key Specifications

Pinout & Package

Package: PLQP0048KB-B - 48-pin LFQFP, 7 mm × 7 mm, 0.5 mm pitch, lead-free, RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5BGFL#50, the LGFP variant adds LCD driving but increases size and cost, while the KGNF offers identical analog performance in a smaller 40-pin QFN - making it optimal for compact, display-less sensor nodes requiring extended temperature range.

Availability

R5F523E5BGFL#50 is available at Aetrix Electronics and suitable for industrial energy metering, strain gauge interface, smart pressure transmitter, and isolated CAN sensor node applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for R5F523E5BGFL#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 markets, with over 40 years of embedded systems expertise.

The RX23E-B Group - including R5F523E5BGFL#50 - was designed specifically for high-accuracy, safety-certifiable analog measurement in Class B industrial equipment, integrating metrology-grade ADCs, diagnostic accelerators, and robust communication peripherals.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E5BGFL#50?

The R5F523E5BGFL#50 supports a maximum sampling rate of 125 kSPS for its 24-bit delta-sigma ADC (DSADB) when configured with modulator clock fMOD = 4 MHz. At lower data rates (e.g., 10 or 54 SPS), the device enables simultaneous 50 Hz and 60 Hz mains interference rejection using configurable sinc filter combinations.

Does R5F523E5BGFL#50 include a real-time clock (RTC) module?

No, the R5F523E5BGFL#50 does not include an RTC module. According to Table 1.2 in the datasheet, RTC functionality is explicitly marked as "Not supported" for all 48-pin LFQFP variants, including R5F523E5BGFL#50. This omission aligns with its target use case in measurement-focused, non-calendar-dependent applications like energy meters with external time sync.

What analog input voltage range does R5F523E5BGFL#50 support?

R5F523E5BGFL#50 supports ±10-V differential input on dedicated HVAIN pins (HVAIN0–HVAIN3), enabled by its high-voltage analog input structure. This allows direct interfacing with unconditioned bridge sensors and shunt-based current monitors without external level-shifting circuitry - a key differentiator from standard 5-V-input MCUs.

Can R5F523E5BGFL#50 operate across the full industrial temperature range?

Yes, R5F523E5BGFL#50 is a G-version device rated for operation from –40°C to +105°C ambient temperature. This extended range is confirmed in Table 1.3 (List of Products) and enables deployment in harsh environments such as outdoor utility meters, factory-floor transmitters, and engine bay sensor nodes.

What is the purpose of the low-side switch (LSW) in R5F523E5BGFL#50?

The low-side switch (LSW) in R5F523E5BGFL#50 provides a 10 Ω (max) on-resistance path for controlled grounding of analog sensor elements - commonly used to power down bridge circuits or RTDs between measurements. It supports up to 30 mA continuous current and integrates fault detection for open-load conditions.