Renesas R5F523E6LDFP#50

Overview

R5F523E6LDFP#50 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensing and metering systems. It integrates a 24-bit delta-sigma ADC with ±10-V input capability, rail-to-rail programmable gain instrumentation amplifier (gain = 1–128), 256 KB on-chip flash, 32 KB SRAM, and CAN 2.0B interface - all operating at up to 32 MHz. Its low-drift voltage reference (2.5 V, 8 ppm/°C), excitation current sources (50–1000 µA), and IEC60730 safety support make it suitable for Class B energy meters and load-cell interfaces.

For engineers reviewing the R5F523E6LDFP#50 datasheet, R5F523E6LDFP#50 pinout, R5F523E6LDFP#50 application, or R5F523E6LDFP#50 equivalent, key selection criteria include its 10-V analog input range, 125 kSPS delta-sigma sampling rate, integrated PGA and excitation sources, CAN communication capability, and LFQFP-100 package compatibility with industrial temperature range (–40°C to +85°C).

Technical Context

The R5F523E6LDFP#50 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU, 64 DMIPS @ 32 MHz, and memory protection unit (MPU) for deterministic real-time control. 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, and offset/gain calibration - synchronized via ELC to avoid CPU intervention.

Digital integration includes one CAN channel (ISO 11898-1, up to 1 Mbps), six SCI channels (asynchronous/clock-sync/smart card), RSPI (16 Mbps), and RIIC (400 kbps). Power management features three low-power modes, LPT running in software standby, and independent watchdog timer with dedicated 15-kHz oscillator - all supporting IEC60730 self-test requirements.

Key Specifications

Pinout & Package

Package: PLQP0100KB-B - 100-pin Low-Profile Quad Flat Package, 14 mm × 14 mm body, 0.5 mm lead pitch, exposed thermal pad, RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E6LDFP#50, R5F523E6LGBS#50 extends operating temperature to +105°C in a smaller TFBGA package but requires layout changes, while R5F523E5LDFP#50 reduces flash/RAM capacity by 50% with zero hardware change - enabling direct substitution where firmware fits.

Availability

R5F523E6LDFP#50 is available at Aetrix Electronics and suitable for industrial energy metering, precision load cell interfaces, process temperature transmitters, smart pressure transducers, and CAN-based sensor nodes requiring stable component supply across long production lifecycles.

Supply support for R5F523E6LDFP#50 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 R5F523E6LDFP#50 - was designed specifically for high-accuracy metrology and sensor signal conditioning, integrating precision analog front ends with robust real-time control and functional safety features.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E6LDFP#50?

The R5F523E6LDFP#50 supports a maximum delta-sigma ADC sampling rate of 125 kSPS, achievable with modulator clock fMOD = 4 MHz and appropriate digital filter configuration. This rate enables high-resolution oversampling for noise reduction in precision industrial sensing applications while maintaining responsiveness to dynamic signals.

Does R5F523E6LDFP#50 support simultaneous 50 Hz and 60 Hz line frequency rejection?

Yes, the R5F523E6LDFP#50's DSADB module provides hardware-assisted simultaneous 50 Hz and 60 Hz rejection at specific output data rates - notably 10 SPS and 54 SPS - using configurable sinc filter combinations. This feature is critical for energy metering accuracy in global markets with mixed grid frequencies.

What analog input voltage range does R5F523E6LDFP#50 support on its HVAIN pins?

The R5F523E6LDFP#50 supports a ±10-V input voltage range on its HVAIN0–HVAIN7 pins, enabled by its high-voltage analog input structure and internal bias generator. This allows direct interfacing with industrial sensors such as 0–10 V or ±10 V output transducers without external level-shifting circuitry.

Can R5F523E6LDFP#50 operate with a single 3.3-V supply across all domains?

No - the R5F523E6LDFP#50 requires separate supplies: VCC (1.8–5.5 V) for digital logic and AVCC0 (4.5–5.5 V) for optimal 12-bit ADC and delta-sigma reference performance. Using 3.3 V on AVCC0 degrades S12ADE accuracy and limits DSADB reference stability; AVCC0 must be ≥4.5 V for full specification compliance.

Is R5F523E6LDFP#50 pin-compatible with other RX23E-B group members in the same package?

Yes - all RX23E-B variants in the PLQP0100KB-B (100-pin LFQFP) package, including R5F523E5LDFP#50 and R5F523E6NDFP#50, share identical pinouts and mechanical footprint. Functional differences (e.g., flash size, ADC range, temperature grade) do not affect physical or electrical connectivity, enabling drop-in replacement within the same package family.