Renesas R5F523E5KGNF#00

Overview

R5F523E5KGNF#00 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 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 a low-drift 2.5-V voltage reference (8 ppm/°C). Operating at up to 32 MHz with 128 KB flash, 16 KB SRAM, and 8 KB data flash, it targets load cell, pressure transducer, and weigh scale systems requiring IEC 60730-compliant self-diagnostic functions.

For engineers reviewing the R5F523E5KGNF#00 datasheet, R5F523E5KGNF#00 pinout, R5F523E5KGNF#00 application, or R5F523E5KGNF#00 equivalent, key selection criteria include its 10-V analog input range, 125 kSPS delta-sigma sampling rate, integrated PGA offset/gain drift specs (4 nV/°C, 1 ppm/°C), CAN interface compliance with ISO 11898-1, and support for hardware-accelerated CRC and ELC-triggered conversions without CPU intervention.

Technical Context

The R5F523E5KGNF#00 implements a CISC Harvard architecture with 5-stage pipeline and variable-length instructions, delivering 64 DMIPS at 32 MHz. Its analog subsystem centers on the DSADB unit synchronized to PCLKC (≤16 MHz), featuring fourth- and fifth-order sinc digital filters, simultaneous 50/60 Hz rejection at 10/54 SPS, and BGO-capable background operation of data flash.

Digital peripherals include a CAN module (RSCAN) supporting standard/extended frames at ≤1 Mbps, seven SCI channels (six SCIg + one SCIh with LIN support), and an event link controller enabling inter-module triggering during CPU sleep-critical for low-power sensor node operation with deterministic timing.

Key Specifications

Pinout & Package

Packaged in a 40-pin HWQFN (PWQN0040KD-A), 6 × 6 mm, 0.5 mm pitch, with exposed thermal pad. Pin count and I/O configuration match Table 1.2 for 40-pin variants: 14 I/O pins, 1 dedicated input pin, 15 pull-up resistors, 14 open-drain outputs, and 2 pins 5-V tolerant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5KGNF#00, R5F523E5KDFM offers display capability at the cost of larger size and higher thermal resistance, while R5F523E5KGNF#30 provides identical functionality in tape-and-reel form-making the #00 variant optimal for prototyping, low-volume builds, and manual assembly where tray packaging simplifies handling.

Availability

R5F523E5KGNF#00 is available at Aetrix Electronics and suitable for industrial weighing systems, pressure transmitters, and IEC 60730-compliant safety controllers requiring stable component supply, long-term lifecycle assurance, and guaranteed -40°C to +85°C operation.

Supply support for R5F523E5KGNF#00 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 targets high-accuracy sensor signal conditioning, integrating precision analog front ends with robust real-time processing and functional safety features for industrial measurement equipment.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E5KGNF#00?

The R5F523E5KGNF#00 supports a maximum delta-sigma ADC sampling rate of 125 kSPS. This rate is achievable with lower-resolution digital filtering configurations (e.g., fifth-order sinc filter) and requires the modulator clock (fMOD) to be set to 4 MHz. At this rate, effective resolution decreases compared to slower modes-3.8 SPS yields 24-bit effective resolution, while 125 kSPS provides ~16-bit ENOB depending on filter selection and noise conditions.

Does R5F523E5KGNF#00 support ±10-V analog inputs, and how are they implemented?

Yes, R5F523E5KGNF#00 supports ±10-V analog inputs via dedicated HVAIN0 and HVAIN1 pins. These pins connect directly to the 24-bit delta-sigma ADC's analog multiplexer and are isolated from the core I/O voltage domain. Operation requires AVCC0 = 4.5–5.5 V and proper external protection circuitry; the internal PGA and reference voltage (2.5 V) remain active to condition the high-voltage signal before digitization.

Can R5F523E5KGNF#00 operate in IEC 60730 Class B-compliant systems?

Yes, R5F523E5KGNF#00 includes hardware-assisted self-diagnostic features required for IEC 60730 Class B, including RAM test support via the Data Operation Circuit (DOC), clock frequency accuracy measurement (CAC), independent watchdog timer (IWDT) with dedicated oscillator, and analog input disconnect detection for the delta-sigma ADC. These features reduce firmware validation scope and improve diagnostic coverage metrics.

What communication interfaces does R5F523E5KGNF#00 provide for industrial networking?

R5F523E5KGNF#00 provides CAN (ISO 11898-1, up to 1 Mbps), seven SCI channels (including one LIN-capable SCIh), one I²C bus interface (400 kbps, SMBus compatible), and one RSPI interface (16 Mbps). The CAN module supports both standard and extended frames with 16 message boxes, making it suitable for deterministic industrial fieldbus communication without external transceivers beyond physical layer components.

Is the 16-bit D/A converter in R5F523E5KGNF#00 buffered, and what reference options does it support?

Yes, the R5F523E5KGNF#00 includes a single-channel 16-bit D/A converter (R16DA) with an internal output buffer capable of driving external loads. It supports selectable reference voltage sources: either the internal 2.5-V reference or an externally supplied reference applied to the VREFH/VREFL pins-enabling flexible ratiometric or absolute output scaling based on system requirements.