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OTA supply

Discussion in 'Electronic Design' started by D. Ford, Sep 7, 2003.

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  1. D. Ford

    D. Ford Guest


    I can't figure out if the LM13700 dual transconductance opamp can work at
    other voltages than +/-15V. No word about this in the datasheets, just
    maximum ratings, and all application examples use +/-15V.
    If it is possible, how low can I go?

  2. The bullets points on the NatSemi data sheet say "+/- 2V to +/-
    22V". However, in the electrical characteristics tables both the
    peak Vout and the peak Common Mode Voltage are both guaranteed to
    only go to within 3V of either supply rail.

    So it looks like +/- 3V minimum supply is required to bias-up
    all the internals ok, but with severe restrictions on the i/o
    swings at that supply voltage.
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