sheldon
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Sonnet,
Looking at the data sheets, the TLE-2027 is only specified down to 8V, +/-4V. Looked at the AD, Maxim, Linear Tech, National, and TI data sheets for the OP-07. National and TI had a minimum supply voltage listed for the OP-07 and it was 6V. So the manufacturer states that the minimum voltage for the TLE-2027 is 8V, +/-4V, and this may explain the issues you are experiencing. You might want to see how much margin your design has since the OP-07 is only specified to +/-3V.
Best Regards,
Sheldon
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