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ADC Requriement

I am having a latest requirement to design the new ADC cards with the below specification. Kindly let me know, about which ADC chip from AD is more suited.

  • Type
    1:
    • Analog inputs: Minimum, 8-Analog
      Inputs (AI) w/ Surge Protection. Surge protection shall be external.
    • Resolution: 10-12bit, min
    • Precision: +/- 0.5% on DC Readings
    • Channel Isolation: 1000 Volts
      isolation between each channel
    • Input Impedance: Min 20 mega ohms up
      to 350 volts ranges, 230k Ohms up to 100 mv range.
  • Type 2:
    • 4-20mA

Best Regards

Sharvy

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  • Hi Sharvy,

         The AD7791 is a good choice for your requirement and it has a buffer. For the AD7791 when the input buffer is enable, the buffer requires headroom. This means that the analog input must be at 100mV inside the power supply rails. The Ain- needs to be connected to some bias(100mV).

    Regards,

    Jonathan

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  • Hi Sharvy,

         The AD7791 is a good choice for your requirement and it has a buffer. For the AD7791 when the input buffer is enable, the buffer requires headroom. This means that the analog input must be at 100mV inside the power supply rails. The Ain- needs to be connected to some bias(100mV).

    Regards,

    Jonathan

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