Renesas R5F523E6MDNF#20

Overview

R5F523E6MDNF#20 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensing applications. It integrates a 24-bit delta-sigma A/D converter 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 256 KB flash/32 KB SRAM - all operating at up to 32 MHz on a single 1.8–5.5 V supply.

For engineers reviewing the R5F523E6MDNF#20 datasheet, R5F523E6MDNF#20 pinout, R5F523E6MDNF#20 application, or R5F523E6MDNF#20 equivalent, key selection criteria include its 40-pin HWQFN package, absence of LCD driver, 31.25 kSPS delta-sigma ADC performance, dual excitation current sourcing capability, and support for IEC60730-compliant self-diagnostic functions in safety-critical sensor systems.

Technical Context

The R5F523E6MDNF#20 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU, 64 DMIPS @ 32 MHz, and memory protection unit (MPU) for deterministic real-time control. Its analog subsystem centers on the DSADB module synchronized to PCLKC (≤16 MHz), featuring fourth- and fifth-order sinc digital filters, simultaneous 50/60 Hz rejection at 10/54 SPS, and offset/gain error calibration.

Digital integration includes one CAN 2.0B channel (1 Mbps), seven SCI interfaces (including LIN-capable SCIh), RSPI (16 Mbps), RIIC (400 kbps), ELC-triggered ADC/DAC conversion, and four-channel DMAC for autonomous data movement - enabling low-CPU-overhead sensor fusion and communication in compact industrial nodes.

Key Specifications

Pinout & Package

Packaged in a 40-pin HWQFN (PWQN0040KD-A), the R5F523E6MDNF#20 features a 6 × 6 mm body with 0.5 mm pitch and exposed thermal pad. Pin functions are defined per Table 1.4 of R01DS0402EJ0100 Rev.1.00, including dedicated HVAIN pins for ±5-V analog inputs, IEXC outputs for excitation current sourcing, and DSAD reference voltage inputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5MDNF#20 and ADUCM360BCPZ-RL7, the R5F523E6MDNF#20 provides higher memory headroom for complex calibration algorithms and firmware updates, plus hardware event chaining (ELC) that offloads timing-critical sensor sequencing from CPU - critical for deterministic multi-sensor synchronization in PLC modules.

Availability

R5F523E6MDNF#20 is available at Aetrix Electronics and suitable for industrial weigh scales, RTD temperature transmitters, PLC analog input modules, and flow meter signal conditioners requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for R5F523E6MDNF#20 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.

The RX23E-B Group - including the R5F523E6MDNF#20 - was designed specifically for high-accuracy sensor signal conditioning in industrial automation, featuring integrated delta-sigma ADCs, excitation sources, and functional safety support to replace discrete analog front-ends.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in the R5F523E6MDNF#20?

The R5F523E6MDNF#20 supports a maximum delta-sigma ADC sampling rate of 31.25 kSPS, achieved at a modulator clock of 4 MHz. This rate is fixed for the M-suffix variant (R5F523E6MDNF#20) and differs from L/K variants offering 125 kSPS. The actual usable data rate depends on selected sinc filter order and oversampling ratio.

Does the R5F523E6MDNF#20 include an LCD controller/driver?

No, the R5F523E6MDNF#20 does not include an LCD controller/driver. The "M" suffix in the part number explicitly denotes absence of LCD functionality, per Renesas' part numbering scheme (Figure 1.1, R01DS0402EJ0100). This distinguishes it from J/N/L-suffix variants which integrate LCD drivers.

What analog input voltage range is supported by the R5F523E6MDNF#20?

The R5F523E6MDNF#20 supports a ±5-V analog input range on its HVAIN pins, consistent with the "M" suffix designation in Table 1.3. It does not support the ±10-V range offered by K/L-suffix variants. Input signals must remain within this ±5-V window relative to AVSS0 to avoid damage or measurement error.

How many excitation current sources does the R5F523E6MDNF#20 provide, and what is their matching accuracy?

The R5F523E6MDNF#20 provides two independent excitation current sources (IEXC0 and IEXC1), each programmable from 50 µA to 1000 µA. Their output current matching is specified as ±0.2%, and drift matching is 5 ppm/°C - enabling high-accuracy 3- and 4-wire RTD measurements without external trimming.

Is the R5F523E6MDNF#20 qualified for IEC60730 Class B compliance?

Yes, the R5F523E6MDNF#20 includes hardware-assisted self-diagnostic features required for IEC60730 Class B, including RAM test support via DOC, clock frequency accuracy monitoring (CAC), independent watchdog timer (IWDT) disconnect detection, and ADC offset/gain calibration assist - reducing software validation burden for safety-certified designs.