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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,

    Thanks for your reply.

    I have reconfirmed and the measurement range is 70mV max. My people have

    refused to give details of Thermocouple but they mentioned that it is

    chromel -alumel type.

    I also saw the table you have mentioned. but I didn't understand how they

    get 70mV. Please suggest method to measure using AD8597 with 5v supply.

    using voltage divider at the input.

    Regards

    Kumar

    Dear

    Thanks and Regards

    P.Kumara swamy

    Embedded Engineer

    Sigma Microsystems

    On Sun, Feb 18, 2018 at 10:48 AM, jrombola <

Reply
  • Hi Jordyn,

    Thanks for your reply.

    I have reconfirmed and the measurement range is 70mV max. My people have

    refused to give details of Thermocouple but they mentioned that it is

    chromel -alumel type.

    I also saw the table you have mentioned. but I didn't understand how they

    get 70mV. Please suggest method to measure using AD8597 with 5v supply.

    using voltage divider at the input.

    Regards

    Kumar

    Dear

    Thanks and Regards

    P.Kumara swamy

    Embedded Engineer

    Sigma Microsystems

    On Sun, Feb 18, 2018 at 10:48 AM, jrombola <

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