Renesas R5F523E5NDFP#50

Overview

R5F523E5NDFP#50 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensing and metering applications. It integrates a 24-bit delta-sigma ADC with 31.25 kSPS max sampling rate, ±5-V input range, 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. It operates at up to 32 MHz across –40°C to +85°C.

For engineers reviewing the R5F523E5NDFP#50 datasheet, R5F523E5NDFP#50 pinout, R5F523E5NDFP#50 application, or R5F523E5NDFP#50 equivalent, key selection criteria include its 31.25 kSPS delta-sigma ADC performance, ±5-V HVAIN input capability, integrated PGA and excitation sources for bridge sensor interfaces, CAN 2.0B compliance, and LFQFP-100 package compatibility with industrial PCB layouts.

Technical Context

The R5F523E5NDFP#50 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU, memory protection unit (MPU), and event link controller (ELC) enabling interrupt-free peripheral coordination. Its analog subsystem centers on the DSADB module, synchronized to PCLKC (≤16 MHz), with fourth- and fifth-order sinc digital filters supporting simultaneous 50/60 Hz rejection at 10/54 SPS.

It features dual A/D converters: the 24-bit DSADB for high-resolution low-speed measurements and an 8-channel 12-bit S12ADE (1.4 µs conversion) for auxiliary signals. The analog front end includes ±10-V-capable HVAIN pins (though R5F523E5NDFP#50 supports only ±5 V per datasheet Table 1.3), bias voltage generator, and voltage reference (2.5 V, 8 ppm/°C).

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 measurement applications.

Compared with R5F523E5LDFP#50, R5F523E5NDFP#50 trades ±10-V input and 125 kSPS for lower cost and identical integration of PGA, excitation, and CAN-making it ideal for ±5-V industrial sensors. Against ADS131M04IPBSR, it delivers full embedded control without external processor coordination or interface glue logic.

Availability

R5F523E5NDFP#50 is available at Aetrix Electronics and suitable for industrial weighing systems, energy metering devices, process temperature transmitters, and smart pressure transmitters requiring stable component supply and long-term production continuity.

Supply support for R5F523E5NDFP#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 R5F523E5NDFP#50-is designed specifically for high-accuracy sensor signal conditioning and metrology, integrating precision analog front ends with robust real-time control and functional safety features.

FAQ

What is the maximum sampling rate supported by the 24-bit delta-sigma ADC in R5F523E5NDFP#50?

The R5F523E5NDFP#50 supports a maximum delta-sigma ADC sampling rate of 31.25 kSPS, as confirmed in Table 1.3 of the R01DS0402EJ0100 datasheet. This rate is achieved with fMOD = 4 MHz and applies specifically to the N-suffix variant (e.g., R5F523E5NDFP#50), distinguishing it from the L-suffix variants rated for 125 kSPS. The device maintains 24-bit effective resolution at lower rates such as 3.8 SPS.

Does R5F523E5NDFP#50 support ±10-V analog inputs?

No, R5F523E5NDFP#50 supports only ±5-V input range on its HVAIN pins, per Table 1.3 in the R01DS0402EJ0100 datasheet. The ±10-V capability is exclusive to L-suffix variants (e.g., R5F523E5LDFP#50). This limitation is part of the product segmentation-R5F523E5NDFP#50 targets cost-sensitive applications where ±5-V range suffices for most bridge and RTD sensors.

What communication interfaces are available on R5F523E5NDFP#50?

R5F523E5NDFP#50 integrates CAN 2.0B (1 Mbps), six SCI channels (asynchronous/clock-synchronous/smart card), one I²C interface (400 kbps, SMBus-compatible), one RSPI channel (16 Mbps), and one RIIC channel. All are confirmed in Table 1.2 and Figure 1.2 of the datasheet. No Ethernet, USB, or LIN is included-SCI12 supports LIN framing but R5F523E5NDFP#50 does not implement the full LIN protocol stack.

Is the R5F523E5NDFP#50 pin-compatible with other RX23E-B group MCUs in the same package?

Yes, R5F523E5NDFP#50 is pin-compatible with all other RX23E-B group MCUs in the PLQP0100KB-B (100-pin LFQFP) package, including R5F523E5LDFP#50 and R5F523E6NDFP#50. Pin functions are consistent across variants per Table 1.4 and Figure 1.1 of the datasheet. Firmware portability depends on enabled peripherals, but hardware layout reuse is fully supported.

What is the operating temperature range for R5F523E5NDFP#50?

R5F523E5NDFP#50 is a D-version device rated for operation from –40°C to +85°C ambient temperature, as specified in Table 1.3 and Figure 1.1 of the R01DS0402EJ0100 datasheet. This qualifies it for industrial environments but excludes extended-temperature applications requiring the G-version (–40°C to +105°C), such as under-hood automotive or high-ambient factory settings.