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TL974: Temp vs Ib characteristic graph

Yusuke Mukuno
Expert 7395 points
Part Number: TL974
Other Parts Discussed in Thread: OPA1654

Hi, 

Do you have any Temp vs Ib characteristic graph for TL974, like below,

(OPA1654 figure23)

Thanks

Muk

  • 0
    TI__Guru*** 143186 points

    Hello Mukuno-san,

    OPA1654 is CMOS, so input current is the same as leakage current. It is very simple. That example chart seems to be based on three points, -40C, 25C, and 85C. Because Y axis is linear, the only meaningful point is at 85C.  

    TL974 is bipolar so the input current is not based on leakage. It varies with supply current and bipolar beta. TL974 supply current varies a lot with VCC. Expect input bias current to mirror that variability.  However there is no ICC vs VCC chart. The bandwidth or better yet, slew rate vs VCC is a good clue at IQ vs VCC. Expect input bias to double between 5V and 15V supply.

    There is no chart, but the electrical table does show a maximum for 5V