Renesas R5F523E5JGFN#50

Overview

R5F523E5JGFN#50 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog sensing in industrial measurement systems. It integrates a 24-bit delta-sigma ADC (125 kSPS max, ±5 V input range), rail-to-rail programmable gain instrumentation amplifier (gain = 1–128), on-chip excitation current sources (50–1000 µA), and a 2.5 V low-drift voltage reference (8 ppm/°C). The device operates at up to 32 MHz, features 128 KB flash, 16 KB SRAM, and supports CAN, SCI, I²C, and RSPI interfaces - deployed in load cell signal conditioning and precision weight scale controllers.

For engineers reviewing the R5F523E5JGFN#50 datasheet, R5F523E5JGFN#50 pinout, R5F523E5JGFN#50 application, or R5F523E5JGFN#50 equivalent, key selection criteria include its integrated 24-bit DSAD with simultaneous 50/60 Hz rejection, ±5 V HVAIN input capability, LCD driver support, and G-grade (–40°C to +105°C) thermal rating for harsh industrial environments.

Technical Context

The R5F523E5JGFN#50 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU and DSP extensions, enabling real-time floating-point sensor data processing. Its analog subsystem centers on the DSADB module synchronized to PCLKC (≤16 MHz), featuring fourth- and fifth-order sinc digital filters, offset/gain calibration, and disconnect detection assist for ±5 V differential inputs.

Timing is managed via independent clock domains: ICLK (CPU/system, ≤32 MHz), PCLKA (MTU2a), PCLKC (DSAD), and PCLKD (S12AD). The ELC enables event-triggered ADC conversion and PWM generation without CPU intervention, while the integrated LSW (10 Ω max) supports direct excitation of bridge sensors.

Key Specifications

Pinout & Package

Package: PLQP0080KB-B - 80-pin LFQFP, 12 × 12 mm, 0.5 mm pitch, exposed pad (thermal pad).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5JDFN#50, the R5F523E5JGFN#50 enables deployment in uncooled enclosures near motors or power electronics; compared with R5F523E5JGFN#30, the #50 variant provides optimized logistics for surface-mount production lines without altering electrical or thermal behavior.

Availability

R5F523E5JGFN#50 is available at Aetrix Electronics and suitable for industrial weighing terminals, strain gauge conditioners, process transmitters, and high-accuracy pressure sensor modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for R5F523E5JGFN#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-precision measurement systems, integrating metrology-grade analog peripherals with robust real-time processing - designed specifically for load cells, RTDs, and bridge-based sensors in industrial automation.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E5JGFN#50?

The R5F523E5JGFN#50 supports a maximum sampling rate of 125 kSPS for its 24-bit delta-sigma ADC (DSADB). This rate is achievable with reduced resolution and filter settings; for full 24-bit effective resolution, typical use cases operate at 3.8–10 SPS with sinc filtering enabled. The modulator clock runs at 4 MHz (typical), and oversampling ratios range from 32 to 1,048,576 depending on configuration.

Does R5F523E5JGFN#50 support ±10 V analog inputs?

No - the R5F523E5JGFN#50 supports ±5 V input range on its HVAIN pins, as indicated by its "J" package code (per Figure 1.1). While the device includes HVCOM pins capable of ±10 V common-mode voltage, the differential input range remains ±5 V. For ±10 V full-scale operation, the "K" or "L" variants (e.g., R5F523E5KGFN#50) must be selected.

What is the purpose of the low-side switch (LSW) in R5F523E5JGFN#50?

The low-side switch (LSW) in the R5F523E5JGFN#50 provides a 10 Ω (max) on-resistance path to ground for controlled sensor excitation sequencing. It enables safe power-down of bridge sensors between measurements, reducing self-heating errors and enabling zero-offset calibration cycles - critical for high-stability weigh scale applications.

Can R5F523E5JGFN#50 operate without an external crystal?

Yes - the R5F523E5JGFN#50 includes on-chip high-speed and low-speed oscillators. The main system clock can run from the internal high-speed oscillator (HSIO) at up to 32 MHz, eliminating the need for an external crystal in cost-sensitive or space-constrained designs. However, for RTC calendar mode or precise timing-critical ADC sampling, the 32.768 kHz sub-clock oscillator (with external crystal) is recommended.

Is the LCD controller in R5F523E5JGFN#50 compatible with standard segment displays?

Yes - the R5F523E5JGFN#50's LCD controller supports 36 segment × 8 common outputs, compatible with standard industrial segment LCDs used in panel meters and weighing indicators. It offers internal voltage boosting and capacitor-split drive methods, allowing direct connection to passive LCD glass without external bias circuitry or driver ICs.