Renesas R5F523E5NDBS#00

Overview

R5F523E5NDBS#00 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 a low-drift 2.5-V voltage reference (8 ppm/°C). Operating at up to 32 MHz with 128 KB flash and 16 KB SRAM, it supports CAN, SCI, I²C, and RSPI for fieldbus-connected instrumentation.

For engineers reviewing the R5F523E5NDBS#00 datasheet, R5F523E5NDBS#00 pinout, R5F523E5NDBS#00 application, or R5F523E5NDBS#00 equivalent, key selection criteria include its 31.25 kSPS delta-sigma ADC performance at ±5 V full-scale, TFBGA100 package footprint, integrated excitation current matching (±0.2%), and support for IEC 60730 safety diagnostics - critical for pressure, load cell, and RTD transmitter designs requiring calibrated analog front-end integration.

Technical Context

The R5F523E5NDBS#00 implements a dedicated analog subsystem centered on the DSADB module, synchronized to PCLKC (up to 16 MHz), with configurable sinc filters (4th- or 5th-order) and simultaneous 50/60 Hz rejection at 10/54 SPS. Its AFEA includes two matched excitation current sources, bias voltage generator (VBIAS = (AVCC0 + AVSS0)/2), and HVAIN pins rated for ±5 V - distinct from higher-voltage variants like R5F523E5LDBS#00.

It uses the RXv2 CPU core with single-precision FPU (IEEE 754), memory protection unit (MPU), and event link controller (ELC) to enable low-power, interrupt-free coordination between the 24-bit ADC, 12-bit S12AD, and CAN or SCI peripherals - essential for deterministic sensor data acquisition and real-time control loops in Class B industrial equipment.

Key Specifications

Pinout & Package

Package: PTBG0100KD-A - 100-pin TFBGA, 5.5 × 5.5 mm body, 0.5 mm pitch, 0.7 mm max height, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E5NDBS#00, R5F523E5NDFP#00 offers identical analog performance in a larger, more manufacturable package, while R5F523E5NDFN#00 trades peripheral count and package size for lower BOM cost - making the TFBGA variant optimal for miniaturized, thermally demanding industrial modules requiring full feature set.

Availability

R5F523E5NDBS#00 is available at Aetrix Electronics and suitable for industrial pressure transmitters, smart load cell modules, RTD-based temperature transmitters, and process current loop sensors requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for safety-critical deployments.

Supply support for R5F523E5NDBS#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 applications.

The RX23E-B Group - including R5F523E5NDBS#00 - was designed specifically for high-accuracy sensor signal conditioning in industrial automation, offering integrated 24-bit delta-sigma ADCs, matched excitation sources, and IEC 60730-compliant safety features in compact packages.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E5NDBS#00?

The R5F523E5NDBS#00 supports a maximum delta-sigma ADC sampling rate of 31.25 kSPS, achieved with a 4-MHz modulator clock and appropriate sinc filter configuration. This rate is specified for the N-variant (e.g., R5F523E5NDBS#00) and differs from the 125-kSPS capability of L/K-variants. The actual usable rate depends on selected digital filter order and oversampling ratio.

Does R5F523E5NDBS#00 include an integrated voltage reference, and what is its accuracy?

Yes, R5F523E5NDBS#00 includes an on-chip 2.5-V voltage reference with a temperature drift of 8 ppm/°C over –40°C to +85°C and ±10 mA output current capability. This reference is used by the 24-bit delta-sigma ADC and can also be routed externally. Its stability eliminates the need for an external precision reference in most industrial sensor applications.

Can R5F523E5NDBS#00 drive a liquid crystal display (LCD)?

Yes, R5F523E5NDBS#00 includes an integrated LCD controller/driver supporting up to 40 segments × 4 commons or 36 segments × 8 commons. This capability is confirmed in Table 1.2 of the datasheet for the 100-pin TFBGA (BS) package variant, enabling direct connection to segment-type displays in portable or panel-mounted instrumentation.

What is the operating temperature range for R5F523E5NDBS#00?

R5F523E5NDBS#00 is a D-version device rated for an operating ambient temperature range of –40°C to +85°C. This specification is explicitly defined in Table 1.3 and Figure 1.1 of the datasheet, and applies to all package variants including the PTBG0100KD-A TFBGA used by this part number.

How many excitation current sources does R5F523E5NDBS#00 provide, and what are their key matching specifications?

R5F523E5NDBS#00 provides two fully integrated excitation current sources (IEXC0 and IEXC1), each programmable from 50 µA to 1000 µA in discrete steps. Their key matching specifications are ±0.2% current matching and 5 ppm/°C drift matching - critical for high-accuracy 3- or 4-wire RTD measurements where mismatch introduces direct temperature error.