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The Great Search – 4.7 µH RF Inductor Q greater than 20 at 25 MHz

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Manage episode 485145663 series 1242341
Content provided by Adafruit Industries. All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by Adafruit Industries or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://ppacc.player.fm/legal.
For our SI4732 radio breakout, we're following the application note (https://www.skyworksinc.com/-/media/Skyworks/SL/documents/public/application-notes/AN383.pdf) for antenna setup. It specifies a low-pass filter inductor of 4.7 µH with a Q factor greater than 20 at 25 MHz and minimal DC resistance. The recommended part, COILCRAFT 1008CS-472GLB (https://www.digikey.com/en/products/detail/coilcraft/1008CS-472XGRC/15794541), is somewhat pricey. Let's explore some alternatives! Recommended Alternatives: Murata LQW2UAS4R7J00L: 4.7 µH, Q=20 @25 MHz, 260 mA, 4 Ω DCR, 1008 package. Abracon AISC-1008-4R7J-T: 4.7 µH, Q=20 @25 MHz, 260 mA, 4 Ω DCR, 1008 package. Murata LQW32FT4R7M8HL: 4.7 µH, Q=30 @25 MHz, 400 mA, 1.2 Ω DCR, 1210 package.
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4963 episodes

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Manage episode 485145663 series 1242341
Content provided by Adafruit Industries. All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by Adafruit Industries or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://ppacc.player.fm/legal.
For our SI4732 radio breakout, we're following the application note (https://www.skyworksinc.com/-/media/Skyworks/SL/documents/public/application-notes/AN383.pdf) for antenna setup. It specifies a low-pass filter inductor of 4.7 µH with a Q factor greater than 20 at 25 MHz and minimal DC resistance. The recommended part, COILCRAFT 1008CS-472GLB (https://www.digikey.com/en/products/detail/coilcraft/1008CS-472XGRC/15794541), is somewhat pricey. Let's explore some alternatives! Recommended Alternatives: Murata LQW2UAS4R7J00L: 4.7 µH, Q=20 @25 MHz, 260 mA, 4 Ω DCR, 1008 package. Abracon AISC-1008-4R7J-T: 4.7 µH, Q=20 @25 MHz, 260 mA, 4 Ω DCR, 1008 package. Murata LQW32FT4R7M8HL: 4.7 µH, Q=30 @25 MHz, 400 mA, 1.2 Ω DCR, 1210 package.
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