I have a problem with ADG1408
For input voltage 1Vpp I have 60mVpp at the output. Signal frequency is set to 1.25MHz. When I set signal frequency to 1kHz 1Vpp, the output signal is 900mVpp. But in datasheet (figure 22) I can read the bandwidth for 1.25MHz is less than -0.5dB. What do you think, where I make a mistake?