AnsweredAssumed Answered

ADN8810 oscillation problem

Question asked by Seregga on May 31, 2018
Latest reply on Jun 5, 2018 by lallison

Hi.

Please help me.

 

I try to develop laser diode driver using ADN8810.

I assembled electrical scheme according datasheet page 12 fig.20

But I have oscillation about 11MHz on the Iout pin(9). If I remove FET transistor - there is no oscillation on the Iout. 

I try to change FET - it doesn't help. Now I use 2sk2009F.

SPI connection looks good, if I change sending value by SPI - Iout RMS value is changing.

This is pictures Iout from oscilloscope

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Please help me, because I don't know where is problem. If you need additional information, please ask.

 

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Best regards

Sergei G

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