The circuit shown in Figure 2-1 shows a typical amplifier drive circuit for the ADS8860. The amplifier (U4) and its associated output filter (R13, R14, and C7) are designed for good SNR and THD performance at a maximum sampling rate (1 MSPS). In general, the OPAx320 was selected for its wide bandwidth and low output impedance. This device also has rail-to-rail input and output swing without crossover distortion. The input filter (R1 and C1) are used to minimize input noise and can be adjusted according to your requirements. For more details on this circuit, see the SAR ADC Front End Component Selection.

Figure 2-1 ADS8860 Input Drive Circuit