• AAF suffer with reduced CMRR because of Passives Tolerances

    Hi,

    I am working on differential Multi-channel high precision DAS. I have chosen the following architectures.

    Spec: CMRR -  >=50dB @ 0 to 1Khz

             Gain Error - 0.02%

    Architecture 1:

    AAF --> MUX --> IA --> Post amplifiers --> ADC

    But…

  • Improving the precision of ADC using calibration

    Hi,

     

    I am designing a multi-channel DAS. The specificatios or as given below;

     

    Total channels : 24

    Analog input signal range : +/- 10V

    Resolution of ADC : 16 bit

    Gain error : <= 0.02% of FSR i.e <=4mV

    Offset voltage : +/-1.2mV

    Temperature…