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Hi, I want to use BALFHB-WL-05D3 balun with STM32WL MCU. Datasheet give a PCB layout recommendation but no schematic. In this layout, there are components between RFO_IN and TX output of the MCU, which one ? Also, where to connect VR_PA ? Thx

CAmig.1
Associate II

‎2023-03-07 07:48 AM

 
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3 REPLIES 3
Sarra.S
ST Employee

‎2023-03-07 08:09 AM

Hello @CAmig.1​ and welcome to ST Community,

Indeed, you won't find the schematics in the datasheet, they are available here!

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

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CAmig.1
Associate II

‎2023-03-07 08:22 AM

Thank you for your answer, I checked the schematics on your link, but they are only using impedance matching network without balun. None of them is using BALFHB-WL-05D3. Could you please give me an example on how to use this balun ?

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CAmig.1
Associate II

‎2023-03-07 08:38 AM

Apologize, finally find the good ones : MB1849, MB1874 and MB1848

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