Renesas R5F523E5MDFM#50

Overview

R5F523E5MDFM#50 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensor interfaces and metering systems. 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 - all operating at up to 32 MHz.

For engineers reviewing the R5F523E5MDFM#50 datasheet, R5F523E5MDFM#50 pinout, R5F523E5MDFM#50 application, or R5F523E5MDFM#50 equivalent, key selection criteria include its 64-pin LFQFP package, 31.25 kSPS delta-sigma ADC performance, 5-V analog input capability, CAN interface compliance with ISO11898-1, and IEC60730 safety support functions.

Technical Context

The R5F523E5MDFM#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- to fifth-order sinc digital filtering and simultaneous 50/60 Hz rejection at 10/54 SPS.

Power management includes three low-power modes (sleep, deep sleep, software standby), low-power timer (LPT) active during standby, and voltage detection circuits (LVDAb) with 14-level programmable thresholds. Clock generation supports main oscillator (1–20 MHz), sub-clock (32.768 kHz), PLL, and dedicated IWDT oscillator.

Key Specifications

Pinout & Package

Package: PLQP0064KB-C - 64-pin Low-profile Quad Flat Package, 10 × 10 mm body, 0.5 mm lead pitch, exposed thermal pad, RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5KDFM#50 and R5F523E5NDFP#50, the R5F523E5MDFM#50 delivers optimal cost-performance balance for compact, ±5-V industrial sensor nodes - retaining full CAN, ELC, IEC60730, and excitation source functionality in the smallest 64-pin footprint without LCD overhead.

Availability

R5F523E5MDFM#50 is available at Aetrix Electronics and suitable for industrial flow meters, smart electricity meters, strain gauge interfaces, and temperature transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F523E5MDFM#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.

The RX23E-B Group - including the R5F523E5MDFM#50 - was designed specifically for high-accuracy sensor signal conditioning in industrial metering, process control, and energy monitoring applications.

FAQ

What is the maximum sampling rate supported by the 24-bit delta-sigma ADC in the R5F523E5MDFM#50?

The R5F523E5MDFM#50 supports a maximum delta-sigma ADC sampling rate of 31.25 kSPS. This is confirmed in Table 1.3 of the R01DS0402EJ0100 datasheet for the M-suffix variant. The device achieves this rate with fourth- or fifth-order sinc filtering and simultaneous 50/60 Hz rejection at specific output data rates (e.g., 10 or 54 SPS). Higher rates (up to 125 kSPS) require the K/L-suffix variants like R5F523E5KDFM#50.

Does the R5F523E5MDFM#50 include an integrated CAN controller, and what standard does it comply with?

Yes, the R5F523E5MDFM#50 includes one channel of the RSCAN (CAN) module compliant with ISO11898-1. It supports both standard and extended frames, operates at up to 1 Mbps, and provides 16 message boxes with configurable acceptance filtering. This capability is explicitly listed under "Up to eight communication functions" in the datasheet features and verified in the block diagram (Figure 1.2) and Table 1.2.

What analog input voltage range is supported by the R5F523E5MDFM#50, and how is it configured?

The R5F523E5MDFM#50 supports a ±5-V analog input range on its HVAIN pins, as defined by the "M" suffix in the part numbering scheme (Figure 1.1). This is implemented using dedicated high-voltage input circuitry distinct from the standard AIN pins. Configuration is fixed by silicon option - no runtime register setting changes the ±5-V range. The device does not support ±10-V input; that requires the K-suffix variant (e.g., R5F523E5KDFM#50).

Can the R5F523E5MDFM#50 operate without an external crystal, and what clock sources are available?

Yes, the R5F523E5MDFM#50 can operate without an external crystal. It integrates multiple on-chip oscillators: a high-speed oscillator (HSO), low-speed oscillator (LSO) for IWDT, and sub-clock oscillator (32.768 kHz) for RTC. The PLL can be driven by the HSO or external clock (up to 20 MHz). Clock flexibility is confirmed in Section 1.1 "Clock functions" and Table 1.1, enabling crystal-free designs for cost-sensitive or space-constrained applications.

Is the R5F523E5MDFM#50 qualified for IEC60730 functional safety compliance, and which hardware features enable this?

Yes, the R5F523E5MDFM#50 includes hardware features explicitly intended to assist IEC60730 compliance, as stated in the "Useful functions for IEC60730 compliance" section. These include self-diagnostic support for the A/D converter, clock frequency accuracy measurement circuit (CAC), independent watchdog timer (IWDT), RAM test assistance via the data operation circuit (DOC), and analog input disconnect detection. These are silicon-provided mechanisms - not software-only - and are validated in the RX23E-B Group documentation.