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Cascading ADL5611, power supply issues

Question asked by jvinod on Feb 8, 2018
Latest reply on Apr 13, 2018 by Microsystems

I want to cascade 3 RF gain stages using ADL5611. I power each ADL5611 directly from a laboratory power supply of 5V. Individually each IC draws a current of 85-90mA. But when I power up two of them together the current reaches 400 mA(170mA expected). I have used a microstrip design on Arlon AD600 substrate and used a layout similar to the evaluation board. This combination occasionally works but mostly gives unexpected results. Can you kindly help resolve this issue?SMcBride

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