Renesas R5F523E6KDNF#00

Overview

R5F523E6KDNF#00 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), on-chip excitation current sources (50–1000 µA), and 256 KB flash/32 KB SRAM - all operating at up to 32 MHz. Its low-drift voltage reference (2.5 V, 8 ppm/°C) and simultaneous 50/60 Hz rejection support Class 0.1 energy metering.

For engineers reviewing the R5F523E6KDNF#00 datasheet, R5F523E6KDNF#00 pinout, R5F523E6KDNF#00 application, or R5F523E6KDNF#00 equivalent, this MCU delivers deterministic real-time control with ELC-triggered ADC conversions, CAN 2.0B communication (1 Mbps), and IEC60730-compliant self-diagnostic features for safety-critical analog front-end designs.

Technical Context

The R5F523E6KDNF#00 implements a Harvard-architecture RXv2 CPU core with 32-bit FPU (IEEE 754 compliant), memory protection unit (MPU), and fast interrupt response. Its analog subsystem centers on a single 24-bit delta-sigma ADC (DSADB) with fourth- and fifth-order sinc filters, configurable per-channel PGA gain, and ±10-V HVAIN inputs routed through internal low-side switches (10 Ω).

Clock management includes independent PCLK domains: PCLKC (≤16 MHz) for DSADB operation, PCLKD (≤32 MHz) for the 12-bit S12AD, and ICLK (≤32 MHz) for CPU execution. The Event Link Controller (ELC) enables direct hardware triggering of ADC conversions, D/A updates, and timer operations without CPU intervention - critical for deterministic signal acquisition in noisy industrial environments.

Key Specifications

Pinout & Package

PWQN0040KD-A is a 40-pin HWQFN package (6 × 6 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Table 1.4 of R01DS0402EJ0100 Rev.1.00, including dedicated HVAIN0–HVAIN1 (±10-V analog inputs), VREFH/VREFL (reference terminals), IEXC0/IEXC1 (excitation outputs), and DSAD_CLK/DSAD_DRDY (delta-sigma interface signals).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5KDNF#00, the R5F523E6KDNF#00 provides double flash/RAM for larger firmware and real-time analytics, while ADUCM360BCPZ-RL7 offers lower active power but sacrifices event-driven determinism and industrial networking - making R5F523E6KDNF#00 optimal for CAN-connected, safety-certifiable metering nodes requiring both precision and processing headroom.

Availability

R5F523E6KDNF#00 is available at Aetrix Electronics and suitable for industrial energy metering, high-accuracy weigh scale controllers, and PLC analog input modules requiring stable component supply across extended product lifecycles.

Supply support for R5F523E6KDNF#00 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 over 40 years of embedded systems expertise.

The RX23E-B Group, including R5F523E6KDNF#00, was designed specifically for high-precision sensor signal conditioning in industrial metering and process control - integrating metrology-grade analog front ends with real-time MCU capabilities and functional safety support.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E6KDNF#00?

The R5F523E6KDNF#00 supports a maximum sampling rate of 125 kSPS for its 24-bit delta-sigma ADC (DSADB) when configured with fMOD = 4 MHz and appropriate sinc filter settings. This rate is achievable with ±10-V input range and PGA enabled, and is validated in the device's electrical characteristics table (R01DS0402EJ0100 Rev.1.00, Page 42). Lower rates (e.g., 3.8 SPS) enable higher effective resolution and simultaneous 50/60 Hz rejection.

Does R5F523E6KDNF#00 support IEC60730 Class B compliance out of the box?

Yes, R5F523E6KDNF#00 includes hardware-assisted features for IEC60730 Class B compliance: memory protection unit (MPU), clock frequency accuracy measurement circuit (CAC), independent watchdog timer (IWDT) with dedicated oscillator, RAM test assistance via data operation circuit (DOC), and analog subsystem self-diagnostic functions (A/D disconnect detection, reference fault detection). These are documented in Section 1.1 and Section 22 of R01DS0402EJ0100 Rev.1.00.

What package type and pin count does R5F523E6KDNF#00 use?

R5F523E6KDNF#00 uses the PWQN0040KD-A package: a 40-pin HWQFN (Heat Sink Wettable Flank Quad Flat No-lead) measuring 6 × 6 mm with 0.5 mm pitch and an exposed thermal pad. This package is confirmed in Table 1.3 (Page 8) and Figure 1.1 (Page 10) of R01DS0402EJ0100 Rev.1.00, and supports the full analog feature set including HVAIN0/HVAIN1 and IEXC0/IEXC1 pins.

Can R5F523E6KDNF#00 drive a 4-wire RTD directly without external components?

Yes, R5F523E6KDNF#00 can drive a 4-wire RTD directly using its two on-chip excitation current sources (IEXC0 and IEXC1), which deliver programmable currents from 50 µA to 1000 µA with ±0.2% matching and 5 ppm/°C drift matching. Combined with the ±10-V HVAIN inputs and rail-to-rail PGA, it enables full 4-wire RTD measurement with ratiometric accuracy - no external DACs, op-amps, or precision resistors required.

Is the 2.5 V voltage reference in R5F523E6KDNF#00 internally buffered and temperature-stable?

Yes, the R5F523E6KDNF#00 integrates a buffered 2.5 V voltage reference with a temperature drift of 8 ppm/°C over –40°C to +85°C (Ta), capable of sourcing/sinking ±10 mA. This reference is used by the 24-bit delta-sigma ADC and is specified in Section 2.3.3 (Analog Functions) of R01DS0402EJ0100 Rev.1.00. It may also be output externally via VREFOUT pin for system-level reference sharing.