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September 11, 2026
Question

Request for ZOPT (Load-pull) data for STM32WLE5CCU6 at 475 MHz

  • September 11, 2026
  • 0 replies
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Hi ST Community,

I am designing a custom board with STM32WLE5CCU6 (UFQFPN48 package) for a LoRa application in the 470–510 MHz band.

I will use RFO_LP only, with +14 dBm output power and VDD_MCU = 3.3 V.

Could you please provide the ZOPT (optimal impedance) for the PA output matching network at 475 MHz for this configuration?

AN5457 Appendix A only covers 868/900/915/923 MHz, so I cannot find the data for 475 MHz. If there is any reference design or application note for this frequency, please point me to it.

Thank you very much.