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Renesas R5F523E5BDNF#20
- Part No.:
- R5F523E5BDNF#20
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
R5F523E5BDNF#20.pdf
- Description:
- 32BIT MCU RX23E-B 128K HWQFN40 T
- Quantity:
- Payment:
- Shipping:
Inventory:1,041
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Product details
Overview
R5F523E5BDNF#20 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensing applications, featuring a 24-bit delta-sigma A/D converter with 125 kSPS max sampling rate, ±5-V input range, 16-KB SRAM, 128-KB flash, and integrated programmable gain instrumentation amplifier (PGA) with rail-to-rail operation. It operates at up to 32 MHz, supports CAN 2.0B (1 Mbps), and targets weight scales, pressure transmitters, and process monitoring systems requiring low-drift analog front-end performance.
For engineers reviewing the R5F523E5BDNF#20 datasheet, R5F523E5BDNF#20 pinout, R5F523E5BDNF#20 application, or R5F523E5BDNF#20 equivalent, this MCU delivers calibrated 24-bit sigma-delta conversion, on-chip excitation current sources (50–1000 µA), ±10-mA low-side switch, and IEC60730-compliant self-test functions - critical for Class B safety certification in industrial instrumentation.
Technical Context
The R5F523E5BDNF#20 integrates a dedicated analog subsystem centered on the DSADB module, synchronized to PCLKC (up to 16 MHz), with configurable sinc filters (4th/5th order), simultaneous 50/60 Hz rejection at 10/54 SPS, and hardware-assisted disconnect detection for HVAIN pins. Its RXv2 CPU core executes floating-point (IEEE754) and DSP instructions at 64 DMIPS, enabling real-time sensor linearization and digital compensation without external co-processors.
Power management includes three low-power modes (sleep, deep sleep, software standby), a low-power timer (LPT) running off the 32.768-kHz sub-clock during standby, and voltage detection circuits (LVDAb) with 14-level programmable thresholds. The ELC enables event-triggered peripheral operation - such as DSAD conversion start or MTU waveform generation - without CPU wake-up, reducing system power in battery-operated field devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | RXv2 32-bit CISC Harvard architecture with 5-stage pipeline, 64 DMIPS @ 32 MHz |
| Max Operating Frequency | 32 MHz - enables full-speed flash access (31.25 ns cycle) and real-time control loop execution |
| Flash / SRAM / Data Flash | 128 KB / 16 KB / 8 KB - supports firmware updates, calibration data storage, and 1M-cycle endurance for field recalibration logs |
| 24-bit Delta-Sigma ADC | 8-channel differential input, 125 kSPS max, ±5-V input range, 24-bit effective resolution @ 3.8 SPS |
| PGA Gain Range | ×1 to ×128 - configurable per channel to match sensor output amplitude while preserving dynamic range |
| Excitation Current Sources | Two channels, 50–1000 µA with ±0.2% matching - drives 4-wire RTDs or strain gauges with minimal self-heating error |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient conditions without derating |
| Package | PWQN0040KD-A: 40-pin HWQFN, 6 × 6 mm, 0.5 mm pitch - compact footprint for space-constrained sensor modules |
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 +85°C operation. It provides 13 general-purpose I/O pins (5-V tolerant), 1 dedicated input pin, 14 pull-up resistors, and 13 open-drain outputs - optimized for sensor interface consolidation with minimal external components.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Core Power Supply | 1.8–5.5 V input; powers CPU, flash, and digital peripherals - decoupling required per Renesas layout guidelines |
| AVCC0 / AVSS0 | Analog Power / Ground | 4.5–5.5 V analog supply; separate domain isolates noise-sensitive DSAD and PGA from digital switching |
| HVAIN0–HVAIN1 | High-Voltage Analog Input | ±5-V differential inputs with internal 10-Ω low-side switch - directly interfaces load cells and bridge sensors |
| IEXC0 / IEXC1 | Excitation Current Output | Programmable 50–1000 µA constant-current sources - enables 3-/4-wire RTD measurement without external drivers |
| DSAD_VREFH / DSAD_VREFL | Delta-Sigma ADC Reference | Accepts external reference or internal 2.5-V VREF; sets full-scale range and noise floor for precision measurement |
| MTU0A / MTU0B | Complementary PWM Output | Drive motor control or gate drivers with dead-time insertion via hardware POE2a module - no CPU overhead |
| CAN_TX / CAN_RX | CAN Bus Interface | Differential signaling compliant with ISO11898-1 at up to 1 Mbps - connects to industrial fieldbus networks |
| SCI0_TXD / SCI0_RXD | Asynchronous Serial Interface | UART communication at configurable baud rates - used for host diagnostics, configuration, or Modbus RTU |
Key Features
| Feature | Design Value |
|---|---|
| 24-bit DSAD with sinc filtering | Simultaneous 50/60 Hz rejection at 10/54 SPS eliminates mains interference in weigh scales and flow meters |
| Rail-to-rail PGA (×1–128) | Preserves SNR across sensor output ranges without external amplification - reduces BOM and layout complexity |
| On-chip 2.5-V voltage reference | 8 ppm/°C drift over –40 to +85°C - enables stable ADC reference without external precision ICs |
| IEC60730 self-test support | Hardware-assisted RAM test, clock accuracy measurement, and IWDT disconnect detection - accelerates Class B certification |
| Event Link Controller (ELC) | Triggers DSAD conversion or MTU waveform generation directly from timer events - eliminates interrupt latency in closed-loop control |
| Low-power timer (LPT) | Runs during software standby using sub-clock oscillator - enables periodic wake-up for sensor polling without full CPU activation |
Applications
| Industrial Weight Scale | Pressure Transmitter |
|---|---|
|
Use Scenario: Digital weighing terminal measuring 0–100 kg with 1-g resolution under varying temperature and EMI conditions. IC Role / Device Role / Timing Role: Primary signal processor: conditions bridge sensor output via PGA and DSAD, performs temperature compensation, and communicates weight data via CAN. Use Value: 24-bit effective resolution at 3.8 SPS and ±4 nV/°C PGA offset drift ensure <0.01% linearity error across –40 to +85°C. |
Use Scenario: 4–20 mA loop-powered pressure transmitter for HVAC or process control with HART modulation capability. IC Role / Device Role / Timing Role: Sensor interface MCU: digitizes piezoresistive sensor output, generates analog output via 16-bit DAC, and handles HART FSK modulation via SCI. Use Value: Integrated excitation current sources (±0.2% matching) and ±10-V HVAIN inputs eliminate external current drivers and level-shifting circuitry. |
| Temperature Monitoring Node | Flow Meter Signal Conditioner |
|
Use Scenario: Wireless battery-powered node monitoring multiple PT100 sensors in factory machinery. IC Role / Device Role / Timing Role: Low-power analog front-end: reads RTDs using IEXC sources, performs cold-junction compensation, and wakes radio only on threshold breach. Use Value: LPT-driven wake-up and software standby mode achieve <1 µA average current - extending 2-AA battery life to >5 years. |
Use Scenario: Ultrasonic flow meter measuring liquid velocity with time-of-flight calculation and totalization. IC Role / Device Role / Timing Role: Precision timing and signal acquisition: captures echo pulses with MTU input capture, computes TOF in FPU, and accumulates volume via RTC calendar mode. Use Value: RXv2 FPU and 64 DMIPS enable real-time TOF calculation and temperature-compensated flow rate derivation without external math coprocessor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision analog measurement applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F523E5NDFP | 100-pin LFQFP, 125 kSPS DSAD, ±5-V input, LCD driver included | Supports segment LCD display (40×4) - suitable for local HMI integration | Select when local display and higher I/O count (58 pins) are required; larger footprint increases PCB area |
| R5F523E5KDNF | Same 40-pin HWQFN package, but ±10-V HVAIN input range and no LCD | Enables direct connection to ±10-V industrial sensors without external attenuators | Choose for wider input range needs; trades off DSAD resolution margin for extended voltage headroom |
Compared with R5F523E5BDNF#20, R5F523E5NDFP offers more I/O and display capability at the cost of size and power, while R5F523E5KDNF extends analog input range but retains identical package and core functionality - making it ideal for legacy sensor retrofits requiring ±10-V compatibility.
Availability
R5F523E5BDNF#20 is available at Aetrix Electronics and suitable for industrial weight scales, pressure transmitters, and temperature monitoring nodes requiring stable component supply, long-term lifecycle support, and traceable sourcing for safety-critical deployments.
Supply support for R5F523E5BDNF#20 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 R5F523E5BDNF#20 - was designed specifically for high-accuracy sensor signal conditioning in industrial instrumentation, integrating metrology-grade analog peripherals with functional safety features for IEC60730 compliance.
FAQ
What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E5BDNF#20?
The R5F523E5BDNF#20 supports a maximum sampling rate of 125 kSPS for its 24-bit delta-sigma ADC (DSADB). This rate is achievable with reduced effective resolution and specific filter configurations; at 3.8 SPS, it achieves 24-bit effective resolution with simultaneous 50/60 Hz rejection. The modulator clock runs at 4 MHz (typical), and oversampling ratios range from 32 to 1,048,576 depending on data rate selection.
Does R5F523E5BDNF#20 include an integrated voltage reference?
Yes, R5F523E5BDNF#20 includes an on-chip 2.5-V voltage reference (VREF) with 8 ppm/°C temperature drift over –40°C to +85°C and ±10 mA output current. This reference can be used directly by the 24-bit DSAD or 16-bit D/A converter, eliminating the need for external precision references in most industrial sensor applications.
Can R5F523E5BDNF#20 drive a 4-wire RTD without external components?
Yes, R5F523E5BDNF#20 integrates two matched excitation current sources (IEXC0/IEXC1) with programmable output from 50 µA to 1000 µA and ±0.2% matching. Combined with its 24-bit DSAD, rail-to-rail PGA, and internal bias voltage generator, it supports direct 4-wire RTD measurement with full cold-junction compensation and linearization - no external current sources or op-amps required.
What low-power modes are supported by R5F523E5BDNF#20?
R5F523E5BDNF#20 supports three low-power modes: Sleep, Deep Sleep, and Software Standby. In Software Standby mode, the CPU and most peripherals halt while the low-power timer (LPT) continues operating from the 32.768-kHz sub-clock, enabling periodic wake-up for sensor polling with sub-µA quiescent current - critical for battery-powered field instruments.
Is R5F523E5BDNF#20 certified for IEC60730 Class B compliance?
R5F523E5BDNF#20 includes hardware-assisted features for IEC60730 Class B compliance, including self-diagnostic functions for the A/D converter, clock frequency accuracy measurement circuit (CAC), independent watchdog timer (IWDT), RAM test assistance via DOC, and analog input disconnect detection. These features reduce software validation effort but require system-level implementation per IEC60730-1 Annex H.
R5F523E5BDNF#20 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 40-WFQFN Exposed Pad
- Series:
- RX23E-B
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- RXv2
- Core Size:
- 32-Bit
- Speed:
- 32MHz
- Connectivity:
- CANbus, I2C, SCI, SPI, UART/USART
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 13
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 8K x 8
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 6x12b SAR, 4x24b Sigma-Delta; D/A 1x16b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F523E5BDNF#20 FAQ
1.How can I place an order for R5F523E5BDNF#20 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F523E5BDNF#20 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for R5F523E5BDNF#20 reliable?
The price and inventory of R5F523E5BDNF#20 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F523E5BDNF#20 is usually 5 days.
3.What payment methods are accepted for R5F523E5BDNF#20?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F523E5BDNF#20 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F523E5BDNF#20?
R5F523E5BDNF#20 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F523E5BDNF#20 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for R5F523E5BDNF#20?
For technical support, including R5F523E5BDNF#20 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F523E5BDNF#20 requirements.
6.How does Aetrix verify that R5F523E5BDNF#20 is sourced from the original manufacturer or authorized distributors?
All R5F523E5BDNF#20 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that R5F523E5BDNF#20 meets industry standards.
7.What is the process for return or replacement of R5F523E5BDNF#20?
All R5F523E5BDNF#20 units undergo pre-shipment inspection (PSI). If there is an issue with R5F523E5BDNF#20, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The R5F523E5BDNF#20 part is unused and in its original packaging.
Return procedure for R5F523E5BDNF#20:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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