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Output range problem for AD8497

Hi. I am using AD8497 for K-Type thermocouple measurement. I have given supply of +5v and 0V. and Ref voltage of +0.5V. My input signal ranges from -2.0mV to 70mV. I get output signal only for input signal upto 40mV. Please suggest schematic for measuring the complete range of my input signal.

Below is the schmatic I have used.

Thanks and Regards,

Kumar

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  • Hi Jordyn,

    I don't know exactly at what temperature is being measured. But the details

    I have is that a K-Type thermocouple is used which gives 70mV max.And I

    have to measure it using Thermocouple amplifier. What will happen if I

    divide the input signal and feed to the amplifier. I don't want to use

    external resistors to adjust the gain externally.

    Regards,

    Kumar

    Dear

    Thanks and Regards

    P.Kumara swamy

    Embedded Engineer

    Sigma Microsystems

    On Sat, Feb 17, 2018 at 10:22 AM, jrombola <

Reply
  • Hi Jordyn,

    I don't know exactly at what temperature is being measured. But the details

    I have is that a K-Type thermocouple is used which gives 70mV max.And I

    have to measure it using Thermocouple amplifier. What will happen if I

    divide the input signal and feed to the amplifier. I don't want to use

    external resistors to adjust the gain externally.

    Regards,

    Kumar

    Dear

    Thanks and Regards

    P.Kumara swamy

    Embedded Engineer

    Sigma Microsystems

    On Sat, Feb 17, 2018 at 10:22 AM, jrombola <

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