Delta-sigma ADC using LTspice

Job ID: 35136449

Budget: $10 – $30 USD

there are two circuits shown in the file I want to connect the output of the first circuit to the ADC delta-sigma which the first circuit will be input for the second circuit ADC.
the value of the capacitors is shown below.
C_1=5.28pF
C_2=0.102nF
C_(a1,a2,a3) =1.76pF