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ADL5513 back-terminating resistor of evaluation board


I am basing my design of a log detector using the schematic of the evaluation board of the  ADL5513.

My question is about the value of the resistor R3. It is necesary to have that output impedance? It can be greater?

If I use no CL nor RL, the value of R3 afect the behavior of the detector?

I am using R4=0Ω and R5=R10=R2=RL=CL=Open

Here is the schematic extracted from the data sheet:

Already thankfull, Santiago

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