Renesas R5F523E6NGFN#50

Overview

R5F523E6NGFN#50 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision industrial sensing and measurement, featuring a 32-MHz CPU core, 256-KB on-chip flash, 32-KB SRAM, 8-KB data flash, one 24-bit delta-sigma A/D converter (31.25 kSPS max, ±5-V input range), and integrated analog front-end with programmable gain instrumentation amplifier, excitation current sources, and voltage reference. It targets load cell, pressure sensor, and weigh scale systems requiring low-drift, high-resolution analog acquisition.

For engineers reviewing the R5F523E6NGFN#50 datasheet, R5F523E6NGFN#50 pinout, R5F523E6NGFN#50 application, or R5F523E6NGFN#50 equivalent, key selection criteria include its 80-pin LFQFP package, G-grade (–40°C to +105°C) operation, CAN 2.0B interface, 24-bit DSAD with sinc filtering, rail-to-rail PGA (gain = 1–128), ±5-V HVAIN input capability, and support for IEC60730 safety diagnostics.

Technical Context

The R5F523E6NGFN#50 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU, 64 DMIPS performance at 32 MHz, and memory protection unit (MPU) for robust embedded execution. Its analog subsystem centers on the DSADB module synchronized to PCLKC (≤16 MHz), with modulator clock fixed at 4 MHz and selectable digital filters (e.g., fifth-order sinc) enabling simultaneous 50/60-Hz rejection at 10 or 54 SPS.

Real-time control is enabled by the MTU2a timer unit (6 × 16-bit channels), ELC event linking for interrupt-free peripheral coordination, and dual ADC system: the 24-bit DSAD for precision weight/strain measurement and the 12-bit S12ADE (1.4 µs conversion) for auxiliary monitoring or fast-response signals. The device operates across 1.8–5.5 V supply and supports three low-power modes with LPT active in software standby.

Key Specifications

Pinout & Package

Package: 80-pin Low-Profile Quad Flat Package (LFQFP), PLQP0080KB-B, 12 × 12 mm body, 0.5 mm pitch, exposed pad (thermal enhancement). Pin count and I/O configuration match Table 1.2 for 80-pin variants: 43 general-purpose I/O pins, 1 dedicated input pin, 44 pull-up resistors, 43 open-drain outputs, 2 pins 5-V tolerant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E6NGFN#50, R5F523E6JGFN#50 adds LCD driver functionality at the cost of increased pin count utilization and firmware complexity, while R5F523E5NGFN#50 reduces memory resources without affecting analog performance-making both viable alternatives depending on display needs and code size constraints.

Availability

R5F523E6NGFN#50 is available at Aetrix Electronics and suitable for industrial weigh scales, pressure transmitters, temperature controllers, and energy metering sensors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F523E6NGFN#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 infrastructure markets.

The RX23E-B Group, including R5F523E6NGFN#50, was designed specifically for high-accuracy industrial sensing applications demanding integrated 24-bit delta-sigma ADCs, programmable analog front ends, and functional safety support.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E6NGFN#50?

The R5F523E6NGFN#50 supports a maximum 24-bit delta-sigma ADC sampling rate of 31.25 kSPS. This rate is achieved with the DSAD modulator clock set to 4 MHz and appropriate digital filter configuration (e.g., fourth-order sinc). At lower data rates such as 10 or 54 SPS, the device provides simultaneous 50/60 Hz power-line rejection for noise-immune industrial measurements.

Does R5F523E6NGFN#50 include an integrated voltage reference, and what is its accuracy?

Yes, R5F523E6NGFN#50 integrates a 2.5-V voltage reference with a temperature drift of 8 ppm/°C over –40°C to +85°C. It delivers ±10 mA output current and serves as the default reference for the 24-bit DSAD and 12-bit S12ADE converters. External reference inputs are also supported via DSAD_VREFH/DSAD_VREFL pins for higher-precision calibration scenarios.

Can R5F523E6NGFN#50 operate with a single supply voltage, and what is the valid range?

Yes, R5F523E6NGFN#50 operates from a single 1.8-V to 5.5-V supply on VCC. However, AVCC0 must be supplied at 4.5–5.5 V when using the 12-bit S12ADE at full speed (32-MHz ADCLK); it may operate down to 1.8 V if only the DSAD is active. This dual-supply flexibility simplifies power design while maintaining analog accuracy where needed.

How many excitation current sources does R5F523E6NGFN#50 provide, and what are their specifications?

R5F523E6NGFN#50 provides two independent excitation current sources (IEXC0 and IEXC1), each programmable from 50 µA to 1000 µA in six discrete steps. They feature ±0.2% current matching and 5 ppm/°C drift matching-critical for precision RTD or load cell bridge biasing where ratio-metric accuracy depends on matched excitation.

Is R5F523E6NGFN#50 qualified for IEC60730 functional safety compliance?

R5F523E6NGFN#50 includes hardware-assisted features for IEC60730 Class B compliance, including DSAD reference/input disconnect detection, IWDT oscillator monitoring, CAC clock accuracy checking, DOC-based RAM test, and analog input fault detectors. These are not full certification enablers but reduce software validation effort for safety-critical industrial equipment.