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
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.
Parameters
| Attributes | Value |
|---|---|
| Main CPU | RXv2 |
| Program Memory (KB) | 128, 256 |
| RAM (KB) | 16, 32 |
| Carrier Type | Full Carton (Tray), Tape & Reel, Tray |
| Supply Voltage (V) | 1.8 - 5.5 |
| I/O Ports | 14, 15, 18, 27, 28, 44, 59 |
| DRAM I/F | No |
| Temp. Range (°C) | Ta = -40 to +85, Ta = -40 to +105 |
| Operating Freq (Max) (MHz) | 32 |
| Ethernet speed | No |
| Ethernet (ch) | 0 |
| EtherCat (ch) (#) | 0 |
| USB FS (host ch/device ch) | ( 0 / 0 ) |
| USB HS (host ch/device ch) | ( 0 / 0 ) |
| USB SS (host ch/device ch) | ( 0 / 0 ) |
| SCI or UART (ch) | 2, 3, 4, 5, 6 |
| SPI (ch) | 3, 4, 5, 6, 7 |
| I2C (#) | 3, 4, 5, 6, 7 |
| CAN (ch) | 1 |
| CAN-FD (ch) | 0 |
| Wireless | No |
| SDHI (ch) | 0 |
| High Resolution Output Timer | No |
| PWM Output (pin#) | 16 |
| 32-Bit Timer (ch) | 0 |
| 16-Bit Timer (ch) (#) | 9 |
| 8-Bit Timer (ch) | 4 |
| Standby operable timer | Yes |
| 12-Bit A/D Converter (ch) | 2, 6, 8 |
| 24-Bit Sigma-Delta A/D Converter (ch) | 4, 6, 8 |
| 16-Bit D/A Converter (ch) | 1 |
| 12-Bit D/A Converter (ch) | 0 |
| 8-Bit D/A Converter (ch) | 0 |
| Capacitive Touch Sensing Unit (ch) | 0 |
| Segment LCD Controller | No, Yes |
| Security & Encryption | Unique ID |
Application Block Diagrams
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