Renesas R5F523E6KDFM#30

Overview

R5F523E6KDFM#30 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensor interfaces 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 with 1.8–5.5 V supply.

For engineers reviewing the R5F523E6KDFM#30 datasheet, R5F523E6KDFM#30 pinout, R5F523E6KDFM#30 application, or R5F523E6KDFM#30 equivalent, key selection criteria include its 10-V analog input range, 125 kSPS delta-sigma sampling rate, integrated excitation current sources (50–1000 µA), low-drift voltage reference (2.5 V, 8 ppm/°C), and support for IEC 60730 safety diagnostics.

Technical Context

The R5F523E6KDFM#30 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU, 64 DMIPS @ 32 MHz, and memory protection unit (MPU) - enabling deterministic real-time control of analog acquisition and digital signal processing tasks. Its dual A/D subsystem combines a 24-bit delta-sigma converter (DSADB) with 8-channel differential input and a separate 12-bit SAR converter (S12ADE) for fast auxiliary measurements.

Timing and system coordination are managed via the Event Link Controller (ELC), which enables direct module-to-module triggering without CPU intervention - critical for synchronized multi-channel sampling, PWM generation, and CAN message timing. The DSAD operates on PCLKC (≤16 MHz), while the S12AD uses PCLKD (≤32 MHz), ensuring independent clock domain control for mixed-signal integrity.

Key Specifications

Pinout & Package

Package: PLQP0064KB-C - 64-pin LFQFP, 10 × 10 mm, 0.5 mm pitch, exposed pad for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E6KDFM#30, R5F523E5KDFM#30 offers identical analog performance and pin compatibility at lower memory capacity, while ADUCM360BCPZ-RL7 provides ARM-based development flexibility but lacks integrated CAN and hardware event linking - increasing BOM count and firmware complexity for industrial fieldbus integration.

Availability

R5F523E6KDFM#30 is available at Aetrix Electronics and suitable for industrial flow meters, energy meters, load cell transmitters, and smart pressure transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F523E6KDFM#30 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 - with deep expertise in high-reliability embedded systems.

The RX23E-B Group, including R5F523E6KDFM#30, was designed specifically for metrology-grade sensor signal conditioning - integrating precision analog front ends, safety-certifiable peripherals, and real-time processing in a single chip for industrial instrumentation.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E6KDFM#30?

The R5F523E6KDFM#30 supports a maximum sampling rate of 125 kSPS for its 24-bit delta-sigma ADC (DSADB) when the modulator clock is set to 4 MHz. This rate is achievable with lower-order sinc filters (e.g., fourth-order) and is specified for the K-variant's ±10-V input configuration. At 3.8 SPS, effective resolution reaches 24 bits with gain = 1.

Does R5F523E6KDFM#30 support IEC 60730 Class B compliance out of the box?

Yes, R5F523E6KDFM#30 includes hardware-assisted IEC 60730 Class B diagnostic features: ADC self-test, clock frequency accuracy measurement (CAC), independent watchdog timer (IWDT), RAM test support via Data Operation Circuit (DOC), and analog input disconnect detection - all documented in Renesas Application Note R01AN3917.

What are the supported excitation current values for RTD sensing with R5F523E6KDFM#30?

R5F523E6KDFM#30 provides two programmable excitation current sources (IEXC0/IEXC1) with six selectable output levels: 50 µA, 100 µA, 250 µA, 500 µA, 750 µA, and 1000 µA. Current matching is ±0.2% and drift matching is 5 ppm/°C - enabling accurate 2-, 3-, or 4-wire RTD measurements without external precision current sources.

Can R5F523E6KDFM#30 operate with a single 3.3-V supply across all peripherals?

No. While the core logic (VCC) accepts 1.8–5.5 V, the 12-bit ADC (S12ADE) requires AVCC0 = 4.5–5.5 V for full specification operation. The 24-bit DSADB and analog front end function correctly at 3.3 V, but S12ADE conversion time degrades above 1.4 µs and INL increases if AVCC0 < 4.5 V - per Section 23.2.1 of R01DS0402EJ0100.

Is the R5F523E6KDFM#30 pin-compatible with other RX23E-B variants in the same package?

Yes, all RX23E-B 64-pin LFQFP variants (e.g., R5F523E6BDFM#30, R5F523E6KDFM#30, R5F523E6MDFM#30) share identical pinouts and mechanical footprint (PLQP0064KB-C). Functional differences - such as ±10-V HVAIN support in the K-variant - are implemented internally; no PCB redesign is needed when migrating between these part numbers.