SBAS872 December 2020 ADC3683
The ADC368x requires external DC bias using the common mode output voltage (VCM) of the ADC together with the termination network as shown in Figure 8-6. The termination is located within the glitch filter network. When using a balun on the input, the termination impedance has to be adjusted to account for the turns ratio of the transformer. When using an amplifier, the termination impedance can be adjusted to optimize the amplifier performance.