OPA656: impedance match

xiaoshuai wei

Part Number: OPA656

Tool/software:

for this OPA, if the input ac source is an RX ant(typ. 50 ohm), do we need to consider impedance match to reduce power reflection?

5 months ago

0 Sima Jalaleddine 5 months ago

TI__Mastermind 26395 points

Hello Xiaoshuai,

It depends on the input frequency and your cable/trace length. Here is a link to an article on transmission line that shows a useful table on thresholds (length vs frequency) where you would start to see power reflections.

Thank you,
Sima

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OPA656: impedance match