Part Number: TS3A4751
The bandwidth indicated in datasheet for TS3A4751 is 123MHz.
But it didn't mention whether it is at -3dB ?
However there is BW graph in datasheet shown below that at -3dB, the freq is about 70MHz.
Why the info is not tally ?
The graph does not mention many test conditions.
Anyway, typical charcteristics are not guaranteed; if you're asking which number to believe, the answer is "neither".
In reply to Clemens Ladisch:
In reply to Adam Torma:
In reply to lee peng kiat:
Okay, a simple buffer does not work for a bidirectional signal.
The 125 MHz bandwith specification is for the - 3 dB point, and was measured in a 50 Ω system. The graph obviously used some different input or output impedance (but keeps it a secret).
Your own circuit certainly does not use 50 Ω. If you know your input/output impedances, you can calculate the bandwidth in your circuit:
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