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AD8139 Not Working. I need help

I am using the AD8139 in the as shown in the attached PDF.

Spice simulations work fine. But On the bench using +-5V supplys,  AD8138 outputs Nothing.

What did I do wrong.

Stan Schekall a783239d66076ba983835f6e0157fe05.pdf

osc_5MHZ.pdf
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  • John

     

    It's a Legacy design.

     

    Earlier Versions of the design used AD8138, Same configuration, and

    worked much better that expected.  Except for Temp > 100C

     

    Current design is an attempt to work at much higher Temp. Simply replace

    AD8138 with AD8139 no problem.

     

    But AD8139 does not work. I was trying to avoid a costly re-design.

     

     

    Stan

Reply
  • John

     

    It's a Legacy design.

     

    Earlier Versions of the design used AD8138, Same configuration, and

    worked much better that expected.  Except for Temp > 100C

     

    Current design is an attempt to work at much higher Temp. Simply replace

    AD8138 with AD8139 no problem.

     

    But AD8139 does not work. I was trying to avoid a costly re-design.

     

     

    Stan

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