Renesas’ RX23E-B MCU offers a low-drift 24-bit A/D converter with a 125 kSPS sampling rate

Renesas’ new RX23E-B MCU offers a low-drift 24-bit delta-sigma A/D converter with up to 125 kS/S Sampling Rate – That is eight times faster than its predecessor. This controller is clocked at 32-MHz and offers up to 256 KB Flash memory rail-to-rail programmable gain instrumentation amplifiers, ±10 V input pins, a low-drift voltage reference, and on-chip excitation current sources.

This year Renesas introduced a range of new products including, the RZ/T2L Arm Cortex-R52 with an EtherCAT controller, and the RA4E2 and RA6E2 Arm Cortex-M33 MCUs for wearables and appliances. Renecus also released its first 32-bit RISC-V CPU  this year, you can check those out if interested.

Features of Renesas’ RX23E-B MCU:

• CPU:
  • 32 MHz 32-bit RXv2 core
  • Includes FPU/DSP instructions
• Memory:
  • 256 KB code Flash
  • 8 KB data Flash
  • 32 KB SRAM
• 24-bit Delta-Sigma ADC with PGA:
  • High data rate: max 125 kSPS
  • Ultra-low noise: 190 nVRMS at 977 SPS/gain=64
• Other Analog Features:
  • 16-bit DAC
  • VREF, IEXC, VBIAS, LSW, TEMPS
  • ±10 V analog input
  • 12-bit SAR ADC
• Communication:
  • 7x UART
  • 1x SCI 
  • 1x RSPI 
  • 1x I2C 
  • 1x CAN
• Timers:
  • 16-bit six-channel PWM timers
  • 8-bit four-channel and 16-bit two-channel general-purpose timers
  • Additional Low-power timer
• HMI:
  • LCD 40 segments x 4 common
• Special Features:
  • A Real-time clock (RTC)
  • A Precise 24-bit Delta-Sigma A/D Converter
  • A 32-bit CPU with RXv2-core, FPU, and a DSP for Data Processing
  • Compact design options with 100-pin TFBGA measuring 5.5 mm x 5.5 mm
• Package Options:
  • 48/64/80/100-pin LFQFP
  • 40-pin HWQFN
  • 100-pin TFBGA

The company also offers a 31.25kS/s variant of the microcontroller, featuring reduced power consumption and enhanced noise resistance at low voltages. This variant achieves 0.18µVrms RMS noise at 1kS/s, one-third that of the RX23E-A model.

To prove the capabilities of this microcontroller for industrial automation, Renesas has designed a pressure control system where the FPU ensures quick, accurate filter and PID control calculations.

The MCU is now available for purchase directly from the Renesas Store. Alternatively, Digikey provides further purchasing options.

Debashis Das

Debashis Das is a technical content writer and embedded engineer with over five years of experience in the industry. With expertise in Embedded C, PCB Design, and SEO optimization, he effectively blends difficult technical topics with clear communication

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