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發表於 2014-5-11 02:48:58
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I studied different products from 3M and I do have concern with AB6005. I think absorption is more important than shielding. Shielding reflect the EMI (like a mirror) back to the chip which may cause some problem. I did use metal shielding tape before and they were not very effective. And metal shielding better be grounded to be effective.
Also, the AB6005 absorption layer is too thin. 0.05mm.
I'd like to try AB5050 and AB5050S (AB5050 is for GHz range, while AB5050S is for MHz range absorption). They are 0.5mm thick. AB5050S is mixed with some metal flake filler in it to make it work for MHz range. I'd like to combine AB5050 and AB5050S to have a wide band absorption solution for chips. For DAC chips like ES9018 operating in MHz speed, AB5050S would be more effective.
I searched a number of sites and Digikey is lowest price so far.
There is Japanese products measured to be more effective than 3M but I could not find them available in small amount. |
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