Unlike a traditional high-speed ADC with its complex input impedance, the LTM9001 is quite easy to drive. The fixed gain amplifier provides resistive inputs such as 400Ω, 200Ω or 50Ω. Because of this, it is easy to interface to the preceding signal chain. Typical interfaces are shown in the three figures. In most high frequency signal chains the signal amplitude is low so that each stage operates with minimal distortion. The ADC input range, however, should be fully utilized to take advantage of its dynamic range and therefore gain is required prior to the ADC. The LTM9001 includes this gain so that the signal entering the LTM9001 has a low amplitude. This means that the preceding stage can operate in the amplitude range where it has the least distortion.