Thermocouple signal amplification using INA126P

Discussion in 'General Electronics Chat' started by ponnus17, Aug 10, 2013.

  1. ponnus17

    Thread Starter New Member

    Aug 10, 2013
    I am new to this forum......
    I'm trying to interface a thermocouple to microcontroller. As the thermocouple produces very low voltage, I've given an INA126P instrumentation amplifier to amplify the voltage. I'm using +5V as V+ and GND as V- and Vref=2.5V.
    But, in the datasheet it says input common mode voltage is 1.5V to 3.5V (from graph). So, I tried to add an offset to the thermocouple input.
    I've done that in two ways:1)Using an Op-amp and 2)Using a voltage divider.
    here is my schematic........

    Sorry, it's hand drawn....
    May I know my circuit is correct?

    Thank you