• 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 Eric,

    Thanks for your response. The discussion with You and Joe is much useful.

    I have another one doubt to be cleared.

    The first figure taken from ADG407 data-sheet.

    Whereas, the second figure taken from ADG1207 data-sheet.

    While comparing…

  • 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…

  • Ask for questions about circuit note(CN-0345)

    Hi,
    Circuit note(CN-0345) is an example of multichannel data acquisition system,here there are some questions I want to ask.


    1.It says that the maximum sample rate of the system is 1 MSPS in page1, but by calculating the settling time of ADG1207,AD8251…

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

    Hi Oliver, Harry & Matt,

    Thank you very much for your responses.

    @Oliver

    Thanks for your comment on input bias current and the selection of Opamps. Unfortunately, the opamps mentioned by you having either higher input OFFSET and input offset current…

  • Ask for questions about circuit note(CN-0345)

    Hi,

    Circuit note(CN-0345) is an example of multichannel data acquisition system,here there are some questions I want to ask.

    1.It says that the maximum sample rate of the system is 1 MSPS in page1, but by calculating the settling time of ADG1207,AD8251…

  • 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…

  • 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…