• Spice model for ADG1207

    Hi,

    I found ADG1207 suitable for my application. In order to verify the functionality of the entire DAS I need the spice model for the part ADG1207.

    Please provide the same..

    Thanks,

    Jebas.

  • RE: Multiplexer - Deriving Cds & Switch OFF resistance value from OFFisolation Vs frequency curve

    Hi Jebas,

    The ADG407 is an older part and it looks like the off isolation plot was made with some measurements that were then extrapolated for the plot. The ADG1207 off isolation was measured on a network analyzer and so full measurement data is available…

  • REGARDING CROSS-TALK OF ADG1207 LOW CAPACITANCE MUX

    Hi,

    ABOUT THE HARDWARE IN BRIEF

    I have designed a fully universal 8 channel differential Analog Input Module (Thermocouple,RTD,mA,0-10VDC). All the channels are non-isolated. At the input of each channel there is a common-mode(cut-off = 1kHz)and differential…

  • RE: Whats the best Inamp for high speed current sensing?

    Hi Ian,

    Muxes like the ADG1407 have to use larger devices to get the low R_on. Therefore they end up with higher capacitance. In-amps like the AD8253 or AD8221 have very high input resistance, so the on-resistance of the mux in series with the in-amp…

  • RE: Precision Opamp Selection for AAF (2nd order Sallen-key)- 24 channels 16 bit DAS

    Jebas,

      A couple of things to consider....

    --  Every year ADC prices come down, so I would consider  using three ADCs or more.  Although the ADG1207 is a low capacitance mux, it still has finite on resistance and capacitance.  To get to 16 bits of accuracy…

  • 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…

  • Regarding "Earthing of isolated circuits" in measurement applications like temperature measurement using thermocouple.

    Respected Sir,

    I am on the verge of completion of an 8-channel analog input module design. Each channel can measure RTD Pt-100, Thermocouple (J,K,R,S,T,B,N),0-10VDC and 0-20mA input types. A 24VDC external supply can power this module. I have used an…

  • 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…

  • TAGS LIST: Switches/Multiplexers

    AD8104
    AD8105
    AD8106
    AD8107
    AD8108
    AD8109
    AD8110
    AD8111
    AD8112
    AD8113
    AD8114
    AD8115
    AD8116
    AD8117
    AD8118
    AD8175
    AD8176
    AD8177
    AD8178
    AD8186
    ADV3200
    ADV3201
    ADV3202
    ADV3203
    ADV3205
    ADV3224
    ADV3225