Renesas R5F523E5KGNF#40

Overview

R5F523E5KGNF#40 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), 128 KB on-chip flash, 16 KB SRAM, and a CAN 2.0B interface compliant to ISO 11898-1 at up to 1 Mbps - all operating at 32 MHz.

For engineers reviewing the R5F523E5KGNF#40 datasheet, R5F523E5KGNF#40 pinout, R5F523E5KGNF#40 application, or R5F523E5KGNF#40 equivalent, this MCU delivers calibrated 24-bit measurement resolution at up to 125 kSPS, low-drift voltage reference (2.5 V, 8 ppm/°C), dual excitation current sources (50–1000 µA), and IEC 60730-compliant self-diagnostic support for safety-critical sensor systems.

Technical Context

The R5F523E5KGNF#40 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU, 64 DMIPS performance at 32 MHz, and Harvard architecture with 5-stage pipeline. Its analog subsystem centers on the DSADB module, featuring fourth- and fifth-order sinc digital filters, simultaneous 50/60 Hz rejection at 10/54 SPS, and offset/gain error calibration.

Power management includes three low-power modes (sleep, deep sleep, software standby), LPT operation during standby, and voltage detection circuits (LVDAb) with 14-level programmable thresholds. Clocking supports main oscillator (1–20 MHz), sub-clock (32.768 kHz), PLL, and dedicated IWDT oscillator (15 kHz).

Key Specifications

Pinout & Package

Packaged in a 40-pin HWQFN (PWQN0040KD-A), 6 × 6 mm, 0.5 mm pitch, with exposed thermal pad. Pin functions include 13 general-purpose I/Os (5-V tolerant), 2 HVAIN inputs (±10 V), AVCC0/AVSS0 analog supplies, VREFH/VREFL reference pins, IEXC0/IEXC1 excitation outputs, and dedicated DSAD clock/control signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5KDFM, the R5F523E5KGNF#40 offers higher pin density and identical analog precision in a smaller 40-pin HWQFN, while R5F523E5KGNF#30 provides identical functionality in tape-and-reel form for production scalability - making the #40 variant optimal for compact, high-channel-count sensor nodes.

Availability

R5F523E5KGNF#40 is available at Aetrix Electronics and suitable for industrial sensor interfaces, smart transmitters, and battery monitoring systems requiring stable component supply, long-term lifecycle assurance, and guaranteed -40°C to +105°C operation.

Supply support for R5F523E5KGNF#40 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 the R5F523E5KGNF#40 - was designed specifically for high-accuracy, low-drift analog measurement in industrial sensing, supporting IEC 60730 compliance and eliminating external signal-conditioning components.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in the R5F523E5KGNF#40?

The R5F523E5KGNF#40 supports a maximum sampling rate of 125 kSPS for its 24-bit delta-sigma ADC (DSADB). This rate is achievable with modulator clock fMOD = 4 MHz and appropriate sinc filter configuration - enabling high-speed precision measurement for dynamic sensor signals such as vibration or fast-response pressure transducers.

Does the R5F523E5KGNF#40 support ±10-V analog inputs, and how are they implemented?

Yes, the R5F523E5KGNF#40 supports ±10-V analog inputs via dedicated HVAIN0 and HVAIN1 pins. These pins connect directly to the internal 24-bit delta-sigma ADC's analog multiplexer and programmable gain instrumentation amplifier, allowing direct interface with industrial transducers without external level-shifting circuitry - confirmed in the DSADB section of the R01DS0402EJ0100 datasheet.

What is the operating temperature range specified for the R5F523E5KGNF#40?

The R5F523E5KGNF#40 is a G-version device rated for an operating ambient temperature range of –40°C to +105°C. This specification is explicitly defined in Table 1.3 of the R01DS0402EJ0100 datasheet and applies across all supported supply voltages (1.8–5.5 V) and peripheral functions, including the 24-bit ADC and CAN interface.

How many excitation current sources does the R5F523E5KGNF#40 integrate, and what are their key specifications?

The R5F523E5KGNF#40 integrates two independent excitation current sources (IEXC0 and IEXC1), each programmable from 50 µA to 1000 µA in six discrete steps. They feature ±0.2% current matching and 5 ppm/°C drift matching - critical for accurate 3-/4-wire RTD measurements and ratiometric bridge sensing, as documented in the AFEA section of the datasheet.

Is the R5F523E5KGNF#40 pin-compatible with other members of the RX23E-B Group, such as R5F523E5KDFM?

No, the R5F523E5KGNF#40 (40-pin HWQFN) is not pin-compatible with R5F523E5KDFM (64-pin LFQFP); they differ in package type, pin count, and physical layout. While both share identical core peripherals and analog specifications, their I/O mapping, power pin distribution, and thermal pad configuration are incompatible - requiring distinct PCB layouts for each package variant.