Renesas R5F523E6BGNF#20

Overview

R5F523E6BGNF#20 from Renesas is a 32-bit RXv2 core MCU with 256 KB flash, 32 KB SRAM, and 8 KB data flash, operating at up to 32 MHz. It integrates a 24-bit delta-sigma ADC (125 kSPS, ±5 V input range), 16-bit DAC, dual excitation current sources (50–1000 µA), rail-to-rail PGA (gain ×1–×128), and CAN 2.0B interface - designed for high-precision industrial sensor signal conditioning and closed-loop control in temperature-extended environments.

For engineers reviewing the R5F523E6BGNF#20 datasheet, R5F523E6BGNF#20 pinout, R5F523E6BGNF#20 application, or R5F523E6BGNF#20 equivalent, key selection criteria include its 24-bit ADC performance at 125 kSPS, ±5-V HVAIN capability, integrated excitation sources for RTD/bridge sensors, -40°C to +105°C operation, and HWQFN-40 package compatibility with space-constrained industrial modules.

Technical Context

The R5F523E6BGNF#20 implements the RXv2 CPU core with IEEE 754-compliant FPU and DSP instructions, enabling real-time floating-point math for sensor linearization and compensation algorithms. Its analog subsystem centers on the DSADB module, synchronized to PCLKC (≤16 MHz), with configurable sinc filters and simultaneous 50/60 Hz rejection at 10/54 SPS.

Power management includes three low-power modes (sleep, deep sleep, software standby), with LPT running off sub-clock during standby. The ELC enables interrupt-free inter-module triggering - e.g., MTU2a PWM edge initiating DSADB conversion - while the MPU enforces memory protection for IEC 60730 Class B compliance.

Key Specifications

Pinout & Package

PWQN0040KD-A: 40-pin HWQFN, 6 mm × 6 mm, 0.5 mm pitch, exposed thermal pad, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision sensor interface applications.

Compared with R5F523E6KGNF#20, R5F523E6BGNF#20 trades ±10 V input range for lower cost and same 125 kSPS ADC performance; versus R5F523E5BGNF#20, it doubles flash/RAM capacity for complex calibration models and communication stacks while retaining identical analog front-end fidelity.

Availability

R5F523E6BGNF#20 is available at Aetrix Electronics and suitable for industrial temperature transmitters, high-accuracy load cell interfaces, smart pressure transducers, programmable logic controller I/O modules, and precision analog front-end designs requiring stable component supply across extended temperature and long production lifecycles.

Supply support for R5F523E6BGNF#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 infrastructure markets.

The RX23E-B Group - including R5F523E6BGNF#20 - was engineered specifically for high-precision analog measurement in harsh industrial environments, integrating metrology-grade ADCs, excitation sources, and functional safety features into a single compact MCU.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E6BGNF#20?

The R5F523E6BGNF#20 supports a maximum 24-bit delta-sigma ADC sampling rate of 125 kSPS. This rate is achievable with reduced effective resolution and specific sinc filter configuration; at 3.8 SPS, the device achieves 24-bit effective resolution with gain = 1. The modulator clock is fixed at 4 MHz (typ.), and oversampling ratios range from 32 to 1,048,576 depending on data rate selection.

Does R5F523E6BGNF#20 include an integrated voltage reference, and what are its specifications?

Yes, R5F523E6BGNF#20 includes an on-chip voltage reference (VREF) with 2.5 V nominal output, 8 ppm/°C temperature drift over –40°C to +85°C, and ±10 mA output current capability. It also provides a bias voltage source (VBIAS) outputting (AVCC0 + AVSS0)/2, used for common-mode setting in differential analog measurements.

Can R5F523E6BGNF#20 operate without external crystal oscillators?

Yes, R5F523E6BGNF#20 can operate without external crystals by using its on-chip high-speed oscillator (HOCO) for system clock generation. The HOCO supports frequencies up to 32 MHz with ±1% accuracy after calibration, and the device also includes low-speed (LOCO), sub-clock (SOSCI), and IWDT-dedicated oscillators - enabling full functionality in crystal-less designs where timing tolerance permits.

What is the purpose of the Event Link Controller (ELC) in R5F523E6BGNF#20?

The Event Link Controller (ELC) in R5F523E6BGNF#20 enables direct hardware-level triggering between peripherals - for example, an MTU2a timer output edge can initiate DSADB conversion or trigger DMACA transfer - without CPU involvement or interrupt latency. This reduces software overhead and improves deterministic timing in real-time sensor acquisition and control loops.

Is R5F523E6BGNF#20 qualified for IEC 60730 Class B compliance?

Yes, R5F523E6BGNF#20 includes multiple hardware features supporting IEC 60730 Class B compliance: self-diagnostic assistance for the A/D converter and IWDT, clock frequency accuracy measurement circuit (CAC), RAM test support via DOC, and analog input disconnect detection. These are documented in the R01DS0402EJ0100 datasheet and intended for use in safety-related software routines.