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Connecting Four ADL5531 In Series

Question asked by c3mdc on Mar 9, 2015
Latest reply on Mar 20, 2015 by bkamak



      I'm attempting to cascade 4 ADL5531 in series to amplify a very small signal.  I tested this out using the ADL5531 eval boards and it seemed to work fine.  On my PCB, the amps are getting really hot, pulling double the expected 100mA current.  I'm unable to tell if the parts are damaged since they are still passing the signal, but I'm not letting them run long enough to see if they pop.


     The schematic is attached.  Let me know if you have any thoughts.  I've attached a shot of the layout as well.