5.8dB is voltage conversion gain not power conversion gain, you may calculate the power conversion gain from it.In general,demodulator has negative power conversion gain.
Basically yes, you should load the IF outputs with near 500 ohms (minimum 200), as the datasheet recommends.Hi vfone,
Thanks for the evaluation board info. I am wondering the ADL5380 power output and Vpp is not compatible. Is the answer correct? Beside, I not quite understand about a sentence on page 3 regarding the conversion gain, which is as below,
"Table 1 assumes a 500 Ω load, 5.3573 dB conversion gain, and −4.643 dB power gain for the ADL5380."
Does it mean the ADL5380 output have to be 500 ohms load? Why is there a 5.3dB gain but the table shows a -4dB loss?
Okay, when using a 4:1 balun on the output you should be presenting the IF port with 200ohms. The datasheet says that the voltage conversion gain with 200ohms should be around 5.9dB, so the power conversion gain should be around -0.1dB. So something besides the IF transformer is wrong. What is your input return loss on the RF port? How much current is the thing drawing?Hi mtweig,
I have tried to both the balun below,
T1-6T ratio 1:1
https://www.minicircuits.com/pdfs/T1-6T-KK81.pdf
and
ADt4-6T ratio 1:4
https://www.minicircuits.com/pdfs/ADT4-6T.pdf
However, both has the same results with -7~-9 dB power loss.
No, power gain and voltage gain are different, and you can't relate the two without knowing the impedance at both ports.For the 5.3dB voltage gain, if converts the voltage gain to power gain, is it suppose to be around ~12 dB power gain?
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