REF02: TEMP pin

Hello,

I have a question about the TEMP pin of REF02.

The explanation of the TEMP pin has the description in page15 of the REF02 data sheet.

There is a description that recommends the OpAmp of a low bias like AD8641 to be used for here.

Is this bias current allowed up to how many pA?

Best Regards,

Mr.K

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    •  Analog Employees 
    on Dec 2, 2014 11:33 PM

    Hi Mr. K,

    I just want to clarify that bias current is the amount of current that the input circuitry of op amp requires for its proper operation. If the bias current of AD8641 is 260pA(max), then it is also the maximum current that the AD8641 can be drawn from the temp pin of REF02. Since the 260pA/0.26nA bias current is lower than the limited current of 50nA, the temperature monitoring circuit shown in figure 36 of REF02 datasheet should work.

    Regards,

    Jay

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  • 0
    •  Analog Employees 
    on Dec 2, 2014 11:33 PM

    Hi Mr. K,

    I just want to clarify that bias current is the amount of current that the input circuitry of op amp requires for its proper operation. If the bias current of AD8641 is 260pA(max), then it is also the maximum current that the AD8641 can be drawn from the temp pin of REF02. Since the 260pA/0.26nA bias current is lower than the limited current of 50nA, the temperature monitoring circuit shown in figure 36 of REF02 datasheet should work.

    Regards,

    Jay

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