Renesas R5F523E5BGFM#50

Overview

R5F523E5BGFM#50 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensing applications. It integrates a 24-bit delta-sigma ADC with ±10-V input capability, rail-to-rail programmable gain instrumentation amplifier (gain = 1–128), on-chip excitation current sources (50–1000 µA), and 128 KB flash/16 KB SRAM. Operating at up to 32 MHz, it supports CAN, SCI, I²C, and RSPI interfaces in a 64-pin LFQFP package rated for –40°C to +105°C.

For engineers reviewing the R5F523E5BGFM#50 datasheet, R5F523E5BGFM#50 pinout, R5F523E5BGFM#50 application, or R5F523E5BGFM#50 equivalent, this MCU delivers calibrated 24-bit measurement accuracy, integrated analog front-end signal conditioning, and real-time control features suitable for load cell, strain gauge, and RTD-based systems requiring IEC 60730 compliance.

Technical Context

The R5F523E5BGFM#50 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU and DSP instructions, enabling real-time floating-point computation for sensor linearization and compensation algorithms. Its dual A/D subsystem combines a high-resolution 24-bit delta-sigma converter (125 kSPS max, 24-bit effective resolution at 3.8 SPS) with an 8-channel 12-bit SAR ADC (1.4 µs conversion time) for auxiliary monitoring.

On-chip analog resources include two independent excitation current sources with ±0.2% matching and 5 ppm/°C drift, a low-drift 2.5 V voltage reference (8 ppm/°C), and a low-side switch (10 Ω on-resistance) for sensor bias control. Clocking is managed via PLL, sub-clock (32.768 kHz), and dedicated IWDT oscillator, with ELC enabling event-triggered ADC conversions without CPU intervention.

Key Specifications

Pinout & Package

Package: PLQP0064KB-C - 64-pin LFQFP, 10 mm × 10 mm, 0.5 mm pitch, exposed pad, RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5KDFM#50 and R5F523E5JDFN#50, the R5F523E5BGFM#50 provides optimal cost and footprint efficiency for compact, non-LCD, high-precision analog acquisition nodes where 30 GPIO and absence of RTC are acceptable trade-offs for reduced PCB area and BOM count.

Availability

R5F523E5BGFM#50 is available at Aetrix Electronics and suitable for industrial weighing systems, strain gauge conditioners, RTD transmitters, and smart pressure transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F523E5BGFM#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 is designed specifically for high-accuracy sensor signal acquisition and processing in demanding industrial environments, integrating precision analog peripherals with robust real-time control capabilities.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E5BGFM#50?

The R5F523E5BGFM#50 supports a maximum delta-sigma ADC sampling rate of 125 kSPS. This rate is achievable with lower resolution settings and appropriate sinc filter configuration; at 24-bit effective resolution, the typical usable rate is 3.8 SPS with fourth-order sinc filtering and simultaneous 50/60 Hz rejection. The modulator clock is fixed at 4 MHz (typical), and oversampling ratios range from 32 to 1,048,576.

Does R5F523E5BGFM#50 include a real-time clock (RTC)?

No, the R5F523E5BGFM#50 does not include a real-time clock. According to Table 1.2 in the datasheet, RTC functionality is explicitly marked as "Not supported" for all 64-pin LFQFP variants of the RX23E-B Group, including R5F523E5BGFM#50. Customers requiring timekeeping must implement external RTC ICs or use alternative packages like the 100-pin TFBGA (e.g., R5F523E5LGBS) which do support RTC.

What analog input voltage range does R5F523E5BGFM#50 support?

The R5F523E5BGFM#50 supports a ±10-V analog input range on its HVAIN pins (HVAIN0–HVAIN3), enabled by its high-voltage analog input capability. This is confirmed by the part number decoding in Figure 1.1: the "B" suffix denotes "up to 5-V analog input range, LCD driver not included", but Table 1.3 lists R5F523E5BGFM#50 under the "K" row (10 V) and "B" row (5 V) - cross-referencing with the "Analog Input Range (max.)" column shows "5 V" for R5F523E5BGFM#50. However, the device's HVAIN pins are rated for ±10 V absolute maximum, and the "B" variant supports up to 5 V differential input range. For ±10 V operation, R5F523E5KDFM#50 (K-suffix) is required.

Can R5F523E5BGFM#50 drive an LCD panel?

No, R5F523E5BGFM#50 does not include an LCD controller/driver. Per Figure 1.1 and Table 1.3, the "B" suffix in the part number indicates "LCD driver not included". In Table 1.2, LCD functionality is marked as "Not available" for all 64-pin LFQFP variants, including R5F523E5BGFM#50. Devices with LCD support carry "J" (5 V, LCD included) or "L" (10 V, LCD included) suffixes and are offered only in 100-pin or 80-pin packages.

What is the operating temperature range for R5F523E5BGFM#50?

The R5F523E5BGFM#50 is a G-version device, specified for operation from –40°C to +105°C. This is confirmed by the "G" in the part number (R5F523E5BGFM#50), where "G" denotes the extended industrial temperature grade per Figure 1.1. It is qualified for use in harsh environments such as motor control cabinets, outdoor instrumentation, and process transmitters where ambient temperatures exceed +85°C.