Renesas R5F523E5NGFP#50

Overview

R5F523E5NGFP#50 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensor nodes and metering systems. It integrates a 24-bit delta-sigma ADC with ±10-V input capability, rail-to-rail programmable gain instrumentation amplifier (PGA), on-chip excitation current sources (50–1000 µA), 2.5-V low-drift voltage reference (8 ppm/°C), and CAN 2.0B interface - all operating at up to 32 MHz with 128 KB flash, 16 KB SRAM, and 8 KB data flash.

For engineers reviewing the R5F523E5NGFP#50 datasheet, R5F523E5NGFP#50 pinout, R5F523E5NGFP#50 application, or R5F523E5NGFP#50 equivalent, this MCU is selected for designs requiring simultaneous high-resolution sigma-delta conversion, precision analog front-end control, IEC60730-compliant self-test, and deterministic real-time communication via CAN or SCI in compact 100-pin LFQFP packaging.

Technical Context

The R5F523E5NGFP#50 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU, 64 DMIPS @ 32 MHz, and memory protection unit (MPU) - enabling deterministic real-time execution of sensor fusion and calibration algorithms. Its analog subsystem centers on the DSADB module: a 24-bit delta-sigma ADC with selectable sinc filters, 3.8 SPS to 31.25 kSPS sampling (per J-column spec), ±10-V HVAIN inputs, and integrated PGA (gain 1–128) with 11 nV_RMS noise at gain=128.

Digital integration includes one CAN channel (ISO 11898-1, up to 1 Mbps), seven SCI channels (including LIN-capable SCIh), RSPI (16 Mbps), RIIC (400 kbps), and ELC-driven event-triggered operation - allowing peripheral coordination without CPU wake-up. Power management supports three low-power modes, LPT operation during software standby, and 1.8–5.5 V single-supply operation with voltage detection circuits.

Key Specifications

Pinout & Package

Package: PLQP0100KB-B - 100-pin Low-Profile Quad Flat Package, 14 mm × 14 mm, 0.5 mm pitch, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5LGFP#50 and R5F523E6NGFP#50, the R5F523E5NGFP#50 delivers identical 31.25 kSPS delta-sigma conversion, CAN, and excitation current capabilities in the same 100-pin LFQFP, while optimizing BOM cost through reduced memory and omission of LCD driver logic - making it the targeted choice for non-display industrial measurement endpoints.

Availability

R5F523E5NGFP#50 is available at Aetrix Electronics and suitable for industrial flow meters, smart electricity meters, condition monitoring nodes, and weigh scale controllers requiring stable component supply across extended product lifecycles.

Supply support for R5F523E5NGFP#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 - with deep expertise in precision analog-MCU integration.

The RX23E-B Group, including the R5F523E5NGFP#50, was designed specifically for high-accuracy sensor signal conditioning and metrology in industrial automation, energy management, and test equipment - combining 24-bit delta-sigma ADCs, programmable analog front-ends, and real-time communication in a single chip.

FAQ

What is the maximum sampling rate supported by the 24-bit delta-sigma ADC in the R5F523E5NGFP#50?

The R5F523E5NGFP#50 supports a maximum sampling rate of 31.25 kSPS for its 24-bit delta-sigma ADC (DSADB), as specified in Table 1.3 of the R01DS0402EJ0100 datasheet. This rate applies to the 'N' variant (e.g., R5F523E5NGFP#50) and is achieved with appropriate modulator clock configuration and filter selection - distinct from the 125 kSPS capability of 'L' or 'K' variants.

Does the R5F523E5NGFP#50 include an integrated LCD controller/driver?

No, the R5F523E5NGFP#50 does not include an LCD controller/driver. Per Figure 1.1 and Table 1.3 of the datasheet, the 'N' suffix indicates the 31.25 kSPS sampling variant *without* LCD functionality. Only part numbers with suffix 'J', 'L', or 'K' (e.g., R5F523E5LGFP#50) integrate the LCDC module supporting up to 40×4 segment/common configurations.

What analog input voltage range is supported by the HVAIN pins on the R5F523E5NGFP#50?

The HVAIN pins on the R5F523E5NGFP#50 support a ±5-V input range, consistent with its 'N' variant designation in Table 1.3. This is confirmed by the "Analog Input Range (max.)" column showing "5 V" for all R5F523E5Nxxx part numbers - differentiating it from 'L'/'K' variants rated for ±10 V.

Can the R5F523E5NGFP#50 operate from a single 3.3-V supply?

Yes, the R5F523E5NGFP#50 operates from a single 1.8-V to 5.5-V supply. At 3.3 V, it supports full 32-MHz operation per the "Power supply voltages/Operating frequencies" section (Page 6), and AVCC0 must be supplied at 4.5–5.5 V when using the 24-bit DSADB - meaning a separate 5-V analog rail is required for maximum ADC performance.

How many excitation current sources does the R5F523E5NGFP#50 provide, and what are their key specifications?

The R5F523E5NGFP#50 provides two independent excitation current sources (IEXC0 and IEXC1), each programmable from 50 µA to 1000 µA in six discrete steps. Key specs include ±0.2% current matching between channels and 5 ppm/°C drift matching - enabling precise 4-wire RTD or bridge sensor biasing without external current-setting components.