Renesas R5F523E6MGNF#40

Overview

R5F523E6MGNF#40 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensor interfaces and smart transmitters. It integrates a 24-bit delta-sigma ADC 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. It targets precision weight scales, pressure transducers, and loop-powered 4–20 mA field devices.

For engineers reviewing the R5F523E6MGNF#40 datasheet, R5F523E6MGNF#40 pinout, R5F523E6MGNF#40 application, or R5F523E6MGNF#40 equivalent, key selection criteria include its 31.25 kSPS delta-sigma ADC performance at ±5 V full-scale, integrated PGA and excitation sources for bridge sensor conditioning, CAN 2.0B interface compliance, and HWQFN-40 package suitability for space-constrained industrial modules.

Technical Context

The R5F523E6MGNF#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 support. Its analog subsystem centers on the DSADB module - a dedicated 24-bit delta-sigma ADC with fourth- to 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).

Timing and power management include three low-power modes (sleep, deep sleep, software standby), a low-power timer (LPT) running off the 32.768 kHz sub-clock, and independent watchdog timer (IWDT) driven by a dedicated 15-kHz on-chip oscillator. Clock generation supports main (1–20 MHz), sub (32.768 kHz), and PLL-based system clocks up to 32 MHz.

Key Specifications

Pinout & Package

PWQN0040KD-A is a 40-pin HWQFN package (6 × 6 mm, 0.5 mm pitch) with exposed thermal pad, rated for –40°C to +105°C operation. Pin functions are defined per Table 1.4 of R01DS0402EJ0100 Rev.1.00, including dedicated HVAIN0–HVAIN1 (±5-V analog inputs), VREFH/VREFL (ADC reference), IEXC0/IEXC1 (excitation outputs), and CANH/CANL.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E6MGNF#40, R5F523E5MGNF#40 offers identical analog performance and package but reduced memory - ideal for streamlined firmware. ADUCM360BCPZ-RL7 provides comparable ADC precision but lacks integrated CAN and excitation, increasing BOM and layout complexity for loop-powered field devices.

Availability

R5F523E6MGNF#40 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart transmitters, and motor protection relays requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F523E6MGNF#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 applications.

The RX23E-B Group - including R5F523E6MGNF#40 - was designed specifically for high-accuracy sensor signal conditioning in industrial automation, featuring integrated delta-sigma ADCs, PGAs, excitation sources, and functional safety support.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E6MGNF#40?

The R5F523E6MGNF#40 supports a maximum delta-sigma ADC sampling rate of 31.25 kSPS, achieved with modulator clock fMOD = 4 MHz and appropriate sinc filter configuration. This rate applies to the M-variant (denoted by 'M' in the part number), which trades peak speed for enhanced noise immunity and stability in industrial environments where 50/60 Hz rejection is critical.

Does R5F523E6MGNF#40 include an integrated CAN controller, and what standard does it comply with?

Yes, R5F523E6MGNF#40 integrates one channel of the RSCAN CAN module compliant with ISO 11898-1 (CAN 2.0B), supporting standard and extended frames at data rates up to 1 Mbps. The CANH and CANL pins are assigned to dedicated package terminals in the PWQN0040KD-A HWQFN, enabling direct connection to industry-standard CAN transceivers.

What analog input voltage range is supported by R5F523E6MGNF#40, and how is it configured?

R5F523E6MGNF#40 supports a ±5-V analog input range on its HVAIN0 and HVAIN1 pins, as indicated by the 'M' suffix in the part number per Renesas' naming convention. This range is fixed for this variant and does not require external scaling resistors - the internal rail-to-rail PGA and input protection circuitry are optimized for direct connection to ±5-V bridge outputs or conditioned sensor signals.

Can R5F523E6MGNF#40 operate from a single 3.3-V supply, and what are the voltage requirements for analog sections?

Yes, R5F523E6MGNF#40 operates from a single 1.8–5.5-V VCC supply. However, the analog front end requires AVCC0 = 4.5–5.5 V for full 12-bit ADC performance and ±5-V HVAIN operation. When only the 12-bit S12AD is active, AVCC0 may be lowered to 1.8 V - but for R5F523E6MGNF#40's primary 24-bit DSAD function, 4.5–5.5 V on AVCC0 is mandatory.

What is the purpose of the excitation current sources in R5F523E6MGNF#40, and what accuracy do they provide?

The R5F523E6MGNF#40 includes two programmable excitation current sources (IEXC0/IEXC1) delivering 50–1000 µA with ±0.2% matching and 5 ppm/°C drift matching. They are designed to bias RTDs, strain gauges, and other resistive sensors directly - eliminating external current sources and enabling ratiometric measurements that cancel reference voltage drift in precision industrial sensing.