Overview
Description
The RX23E-B Group of microcontrollers has a built-in analog front end (AFE) that is ideal for industrial sensor equipment. Compared to the RX23E-A, the high-speed performance and noise performance of the RX23E-B 24-bit delta-sigma A/D converter have been improved. The maximum data rate is 125kSPS, which is fast for a delta-sigma A/D converter and is eight times faster than the RX23E-A. RMS noise has been reduced to about 1/3 of that of the RX23E-A, making it possible to measure strain, temperature, pressure, flow, current, voltage, etc. at high speed and with accuracy. The RX23E-B also has an integrated 16-bit D/A converter and +/-10V high-voltage analog signal input circuit, reducing the overall bill of materials (BOM) and footprint. The CPU is equipped with an RXv2 core that offers excellent digital signal processing (DSP)/floating-point unit (FPU) operation, which enables high-precision measurement, control, and communication on a single chip.
Features
- Analog front end (AFE)
- 24-bit delta-sigma A/D converter with integrated programmable gain amplifier: Up to 24-bit effective resolution, data rate 3.8SPS to 125kSPS, 4nV/°C offset drift, 1ppm/°C gain drift
- 5V analog inputs: Eight differential inputs, 16 single-ended inputs
- ±10V analog inputs: Two differential inputs, four single-ended inputs
- 16-bit D/A converter: DNL = ±1LSB, INL = ±5LSB
- Reference voltage source: Low temperature drift of 10ppm/°C with excellent temperature stability
- Excitation current source: Matched programmable current source, ideal for measuring 3-wire resistance temperature detectors
- MCU component
- CPU: 32-bit RXv2 core, operating frequency 32MHz, digital signal processing can be implemented with DSP instructions and FPU
- Communication interface: SPI x 1 channel, UART x 7 channels, I2C x 1 channel, CAN x 1 channel
Comparison
Applications
Design & Development
Software & Tools
Sample Code
Boards & Kits
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
Support
Support Communities
Get quick technical support online from Renesas Engineering Community technical staff.
Support Communities
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RX23E-B, DSADC, Continuous Conversion on a Single Channel
Dear Fellow ColleaguesI would like to continuously read a differential channel 0.After the filters and oversampling, an SCANNED0 interrupt should be triggered every millisecond. After the first conversation, “r_Config_DSAD0_scanend0_interrupt () is called up exactly once. I would store the value there while the next average is ...
Sep 30, 2024 -
RA2A1, RX23E-B, UART, Power, Batter
Dear Fellows, In our design, we have connected an RA2A1 to an RX23E-B via a UART/SSCI.The RA2 is powered by an LDO from a USB port. The RX23 is powered by an LDO from a battery.When the USB is disconnected, the RA2 should be turned ...
Oct 3, 2024 -
Using Rx23E-B to read from Wheatstone bridge with 24-bit accuracy using 4-20 ma current loop
I want to ask about hardware design. Can i read 4-20 ma current loop with 24-bit accuracy. do i need to design my loop externally or i can use analog front end for that. if using analog front end how many sensors i can power and read using ...
May 13, 2024
FAQs
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Sample software for the RX23E-B
The following sample software is provided HERE for the RX23E-B. RX23E-B Group, Initial Settings Example (R01AN6634) RX23E-B Group, Example of weight measurement using AC excited load cell (R01AN6517) RX23E-B Group, Example of 4-20 mA transmitter using built-in D/A converter (R01AN6518) RX23E-B ...
Nov 22, 2023 -
Compatibility of the RX23E-B and RX23E-A
The RX23E-B and RX23-A are equipped with different AFE, so there is no pin compatibility. However, they have common CPU cores and basic peripheral functions, allowing the design assets of the RX23E-A to be inherited. With regard to the detailed differences, a comparison of the incorporated functions ...
Nov 22, 2023 -
Evaluation boards for RX23E-B
The evaluation board for the RX23E-B sold by Renesas is the following RSSK for RX23E-B. Renesas Solution Starter Kit for RX23E-B (RSSK for RX23E-B) RSSK for RX23E-B includes the GUI-based tool QE for AFE, allowing you to begin evaluation of the AFE immediately without ...
Nov 22, 2023