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ADL5513 log detector  Temperature data required

Question asked by WayneQ on Sep 6, 2013
Latest reply on Sep 6, 2013 by Jim

Dear Sir,

 

             I am using log detector ADL5513ACPZ in my design.I have tested the log detector in following conditions.

 

Operating Freq Range:1.6GHz

 

Voltage applied to TADJ pin : 0.88V

 

 

  1. 1.Condition1-Ambient temperature(+25 Deg C)

 

RF input to log detector= -12dBm

Measured Output voltage= 1.6V

 

  1. 2.Condition2-Low temperature(-10 Deg C)

 

RF input to log detector= -8dBm

Measured Output voltage= 1.6V

 

 

  1. 3.Condition3-High temperature(-+55 Deg C)

 

RF input to log detector= -15dBm

Measured Output voltage= 1.6V

 

 

From the above results,we observed that 80mV(+/-4dB) variation at output of log detector over the temperature -10Deg C to +55Deg C.But in Datasheet it is mentioned that,max output variation over the temperature -40DegC to +85DegC is 10mV(+/-0.5dB).

 

 

please explain the reason for the above results.

 

Expecting your reply at the earliest.

 

 

 

Regards,

 

Wayne

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