Renesas R5F523E5BGNF#40

Overview

R5F523E5BGNF#40 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensor interfaces and metering applications. It integrates a 24-bit delta-sigma ADC with 125 kSPS max sampling rate, ±5-V analog input range, dual excitation current sources (50–1000 µA), rail-to-rail programmable gain instrumentation amplifier (gain = 1–128), and on-chip 2.5-V voltage reference (8 ppm/°C drift). Operating at up to 32 MHz with 128 KB flash, 16 KB SRAM, and 8 KB data flash, it supports IEC60730-compliant diagnostics.

For engineers reviewing the R5F523E5BGNF#40 datasheet, R5F523E5BGNF#40 pinout, R5F523E5BGNF#40 application, or R5F523E5BGNF#40 equivalent, key selection criteria include its 40-pin HWQFN package (6 × 6 mm, 0.5 mm pitch), –40°C to +105°C operating range (G-version), integrated analog front-end for load cell/strain gauge conditioning, CAN 2.0B interface, and hardware-accelerated ELC-triggered conversions without CPU intervention.

Technical Context

The R5F523E5BGNF#40 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU, 64 DMIPS @ 32 MHz, and memory protection unit (MPU) for functional safety. Its analog subsystem centers on the DSADB module - a 24-bit delta-sigma ADC with fourth- and fifth-order sinc filters, simultaneous 50/60 Hz rejection at 10/54 SPS, and ±10-V-capable HVAIN pins (configured for ±5 V in this variant).

Digital integration includes one CAN channel (ISO 11898-1, up to 1 Mbps), six SCI channels (asynchronous/clock-sync/smart card), one I²C bus interface (400 kbps), one RSPI (16 Mbps), four-channel DMAC, and Event Link Controller (ELC) enabling autonomous peripheral coordination during sleep modes. The device uses a 40-pin HWQFN (PWQN0040KD-A) with 13 GPIOs, no LCD driver, and excludes RTC functionality per package mapping.

Key Specifications

Pinout & Package

Packaged in a 40-pin HWQFN (PWQN0040KD-A, 6 × 6 mm, 0.5 mm pitch) with exposed thermal pad, the R5F523E5BGNF#40 provides 13 general-purpose I/O pins, 2 HVAIN analog inputs (±5 V), 2 IEXC excitation outputs, AVCC0/AVSS0 power rails, and dedicated CANH/CANL pins. No RTC or LCD functionality is implemented in this package variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5KGNF#40, the R5F523E5BGNF#40 trades ±10-V input headroom for lower system cost in ±5-V applications; versus R5F523E5BDNF#40, it adds extended temperature resilience critical for outdoor or under-hood deployments without changing PCB layout or firmware.

Availability

R5F523E5BGNF#40 is available at Aetrix Electronics and suitable for industrial weight scale systems, smart electricity meters, process transmitter interfaces, and condition monitoring sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F523E5BGNF#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 IoT markets.

The RX23E-B Group targets high-precision analog measurement applications, integrating metrology-grade ADCs, PGAs, and excitation sources into single-chip solutions for sensor signal conditioning and edge intelligence.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E5BGNF#40?

The R5F523E5BGNF#40 supports a maximum sampling rate of 125 kSPS for its 24-bit delta-sigma ADC. This rate is achievable with reduced effective resolution and specific filter configurations; at 3.8 SPS, it delivers 24-bit effective resolution with gain = 1. The device also supports lower rates (e.g., 10/54 SPS) to enable simultaneous 50/60 Hz rejection for energy metering applications.

Does R5F523E5BGNF#40 include a real-time clock (RTC) module?

No, the R5F523E5BGNF#40 does not include an RTC module. According to Table 1.2 in the datasheet, RTC functionality is excluded in all 40-pin HWQFN variants of the RX23E-B Group, including R5F523E5BGNF#40. Designers requiring calendar/timekeeping must implement external RTC ICs or use software-based timekeeping with the low-power timer (LPT) and sub-clock oscillator.

What analog input voltage range is supported by R5F523E5BGNF#40?

The R5F523E5BGNF#40 supports a ±5-V analog input range on its HVAIN pins. This is confirmed by the part number decoding in Figure 1.1 ('B' suffix denotes "up to 5-V analog input range") and Table 1.3, which lists R5F523E5BGNF#40 with "5 V" under "Analog Input Range (max.)". It does not support the ±10-V range offered by 'K'/'L' variants.

Is R5F523E5BGNF#40 pin-compatible with other RX23E-B Group devices in the same package?

Yes, all RX23E-B Group devices in the PWQN0040KD-A (40-pin HWQFN) package share identical pinouts, including R5F523E5BGNF#40, R5F523E5KGNF#40, and R5F523E5MGNF#40. This allows hardware reuse across variants differing only in analog input range, sampling rate, or temperature grade - simplifying design migration and inventory management.

What is the purpose of the ELC (Event Link Controller) in R5F523E5BGNF#40?

The ELC in R5F523E5BGNF#40 enables direct hardware-level triggering between peripherals without CPU intervention - for example, initiating an ADC conversion upon a timer match event or starting a CAN transmission after DMA completion. This reduces interrupt latency, lowers CPU load, and allows deterministic operation during low-power sleep modes, making it essential for real-time sensor acquisition systems.