AD8226 Gain drift by Temperature

Hello,

I have a question about gain temperature drift of AD8226 from my customer.

According to the datasheet, it is 5ppm/degree C at G=1 and100ppm/degree C for G>1. The customer would like to know the gain temperature drift at G=2. Do you have any reference information about that?

Best regards,

Akira

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  • +1
    •  Analog Employees 
    on Jun 22, 2020 12:40 PM

    Hi AkiraO,

    As the datasheet stated for gains greater than 1 (This includes gain of 2), the gain drift AD8226 will have is -100ppm/C or less (meaning somewhere between 0 to -100ppm/C). This drift doesn't take in to account the drift of the external resistor that will be used as RG therefore you have to take this into account in computing the system's accuracy.

    Since you haven't stated other specifications needed for your application and in case you need better gain accuracy over temperature at gain of 2, you can take a look at some Programmable-gain instrumentation amplifiers such as AD8231, AD8250 and AD8251.

    I hope this helps AkiraO.

    Best Regards,
    Dann

Reply
  • +1
    •  Analog Employees 
    on Jun 22, 2020 12:40 PM

    Hi AkiraO,

    As the datasheet stated for gains greater than 1 (This includes gain of 2), the gain drift AD8226 will have is -100ppm/C or less (meaning somewhere between 0 to -100ppm/C). This drift doesn't take in to account the drift of the external resistor that will be used as RG therefore you have to take this into account in computing the system's accuracy.

    Since you haven't stated other specifications needed for your application and in case you need better gain accuracy over temperature at gain of 2, you can take a look at some Programmable-gain instrumentation amplifiers such as AD8231, AD8250 and AD8251.

    I hope this helps AkiraO.

    Best Regards,
    Dann

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