Design Win

ST25RU3993 reader IC evaluation board

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Product overview


The ST25RU3993-HPEV is a high-power RAIN® (UHF) RFID reader system based on the ST25RU3993 device.

Its purpose is to provide a comprehensive RAIN RFID reader system that allows the user to evaluate the properties and the features of ST25RU3993. To achieve this goal the ST25RU3993-HPEV board, differently from a typical reference design approach, combines a high RF power and a low RF power RFID reader on a single PCB.

Additionally, the ST25RU3993-HPEV board is outfitted with several easy-to-access test points and measurement possibilities. With minor modifications it is possible to change the architecture of the reader, for example, it is possible to control the RF circuitry with external MCU or vice versa. Bypassing the external on-board power amplifier or alternate antenna configurations are additional possibilities.

The ST25RU3993-HPEV is controlled by a graphical user interface (GUI) running on a host PC. The corresponding interface is a USB / UART bridge (requires driver installation). The GUI can be found in dedicated pages on

The board supports tuning the radio frequency from 840 to 960 MHz. and provides two SMB (male) antenna connectors that can be controlled via the GUI. To enable scanning for RAIN RFID transponders connect a suitable 50 Ω UHF antenna for the targeted frequency range.

  • All features

    • Based on ST25RU3993, a RAIN® (UHF) RFID reader IC, featuring:
      • ISO/IEC 18000-63:2015 / Gen2V2
      • GB/T 29768-2013
      • External and internal SW-controlled power amplifier (PA) options (30 and 17.5 dBm maximum TX power, respectively)
      • Configurable TX power level
      • Power detector to monitor TX power
      • Automatic carrier cancellation for improved RX sensitivity
      • Differential RX input
      • RX sensitivity: -80 dBm at 90% read success for one sideband of tag response (ISO18046-3: 2012), -77 dBm at 90% read success for both sidebands of tag response (ISO18046-3: 2020)
      • Adaptive / manual RX gain adjustment
      • Tunable radio frequency (from 840 to 960 MHz), 25 kHz minimum step
      • External frequency reference (20 MHz) assembly option
      • Adaptive / manual anti-collision slot options
      • Continuous wave or Modulated RF output test modes
      • Two antenna ports: SMB (M), with automatic / manual antenna port switching
      • Carrier sense TX option (LBT)
      • UHF Tag RSSI measurement
      • Configurable SELECT command mask
      • UHF transponder EPC Read / Write
      • Transponder read based applications trigger
      • Custom reader TX command editor tool
      • Customizable Gen2 TX commands
      • Direct TX modulation through MCU for proprietary protocol support
      • Store / Recall reader configuration
      • Register map
      • Buzzer
    • Host interface and supply
      • USB/UART bridge
      • USB receptacle: Micro, B-Type
      • Main supply: 6 V DC jack
    • Controlled by STM32L476RGT6 MCU
    • LED indicators, test points and buttons for easy debug / use

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade WEEE Compliant Material Declaration**
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(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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