I have a question.
I think that the output gain of the LMH6521 is (26dB – Attenuator Gain).
Is my understanding correct?
Our customer ask us.
They set the digital attenuator to 18dB (C8h) referring to Table 2 in the datasheet, using Serial interface.
But, they said the output gain had been 1/2(minus 6dB) of the calculated gain.
Their setting are;
INA+/INA- inputs = 2Vp-p sine wave and AC coupling
Digital attenuator = 18dB (Expected output gain = 26dB – 18dB = 8dB)
They said OUTA+/OUTA- had output 2.5Vp-p, though they expected 5Vp-p output.
Is there any other factor of additional x1/2(minus 6dB) gain?
Could you please advise me?