Renesas R5F523E5MGFL#50

Overview

R5F523E5MGFL#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 (gain = 1–128), on-chip excitation current sources (50–1000 µA), and 32-MHz operation delivering 64 DMIPS. The device includes 128 KB flash, 16 KB SRAM, 8 KB data flash, CAN interface, and operates from –40°C to +85°C.

For engineers reviewing the R5F523E5MGFL#50 datasheet, R5F523E5MGFL#50 pinout, R5F523E5MGFL#50 application, or R5F523E5MGFL#50 equivalent, this MCU is selected for designs requiring simultaneous high-resolution sigma-delta conversion, low-drift analog front-end performance, integrated excitation control, and deterministic real-time response in compact 48-pin LFQFP packaging.

Technical Context

The R5F523E5MGFL#50 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU, 5-stage Harvard pipeline, and memory protection unit - enabling deterministic execution of floating-point sensor algorithms. Its analog subsystem centers on the DSADB module synchronized to PCLKC (up to 16 MHz), supporting fourth- and fifth-order sinc filters, 3.8 SPS–125 kSPS data rates, and ±10-V HVAIN inputs with disconnect detection.

Digital integration includes ELC-driven event-triggered ADC/DAC conversions, four-channel DMAC for zero-CPU-overhead transfers, and RSCAN CAN controller compliant with ISO 11898-1 at up to 1 Mbps. Clock management supports independent ICLK (32 MHz), PCLKA/B/C/D domains, and CAC-based frequency accuracy monitoring - critical for IEC 60730 Class B compliance in safety-critical metering.

Key Specifications

Pinout & Package

Package: PLQP0048KB-B - 48-pin Low-Profile Quad Flat Package, 7 mm × 7 mm body, 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 R5F523E5MGFL#50, R5F523E5KDFL#50 retains identical analog precision and excitation features while removing LCD resources, whereas R5F523E5NDFL#50 trades HVAIN capability and sampling speed for lower cost - making the original part optimal for demanding metrology applications requiring full ±10-V range and 125 kSPS throughput.

Availability

R5F523E5MGFL#50 is available at Aetrix Electronics and suitable for industrial flow meters, smart electricity meters, strain gauge load cells, and RTD temperature transmitters requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F523E5MGFL#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 markets - with over 40 years of embedded systems expertise.

The RX23E-B Group targets high-accuracy sensor measurement applications, integrating precision analog front-ends with robust real-time processing to replace discrete signal chains in industrial instrumentation and energy metering.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E5MGFL#50?

The R5F523E5MGFL#50 supports a maximum 24-bit delta-sigma ADC sampling rate of 125 kSPS at 3.8 SPS–125 kSPS programmable range. This is achieved with fMOD = 4 MHz and appropriate sinc filter configuration - enabling high-speed acquisition for dynamic sensor signals such as vibration or fast-response pressure transducers while maintaining 24-bit effective resolution at lower rates.

Does R5F523E5MGFL#50 include an integrated voltage reference, and what is its stability?

Yes, R5F523E5MGFL#50 includes an on-chip 2.5 V voltage reference with ±8 ppm/°C temperature drift over –40°C to +85°C and ±10 mA output drive capability. This reference is used by the 24-bit DSADC, 16-bit DAC, and analog comparators - eliminating need for external references in most precision measurement designs and ensuring consistent scaling across temperature.

Can R5F523E5MGFL#50 drive a 4-wire RTD directly, and how is current matching ensured?

Yes, R5F523E5MGFL#50 integrates two excitation current sources (IEXC0/IEXC1) programmable from 50 µA to 1000 µA with ±0.2% matching and 5 ppm/°C drift matching. These sources directly bias 4-wire RTDs, and their tight matching minimizes lead-resistance-induced errors - enabling Class A RTD accuracy without external current DACs or trimming resistors.

What is the role of the Event Link Controller (ELC) in R5F523E5MGFL#50, and how does it improve system determinism?

The ELC in R5F523E5MGFL#50 enables direct hardware-level triggering between peripherals - for example, an MTU timer overflow can initiate an ADC conversion without CPU involvement or interrupt latency. This ensures sub-microsecond timing consistency in closed-loop control and sensor sampling, critical for IEC 60730 compliance and real-time metrology applications where jitter must be eliminated.

Is the R5F523E5MGFL#50 pin-compatible with other RX23E-B group MCUs in the same package?

Yes, all RX23E-B MCUs in the PLQP0048KB-B (48-pin LFQFP) package - including R5F523E5MGFL#50, R5F523E5KDFL#50, and R5F523E5NDFL#50 - share identical pinouts and mechanical footprint. This allows hardware reuse across variants differing only in analog input range, sampling rate, or LCD functionality - simplifying design scalability and inventory management.