LMC6042_17 Datasheet, PDF (12/24 Pages) Texas Instruments – CMOS Dual Micropower Operational Amplifier

LMC6042
SNOS611E – AUGUST 1999 – REVISED MARCH 2013
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Figure 32. Example of Guard Ring in P.C. Board Layout
Figure 33. Inverting Amplifier
Figure 34. Non-Inverting Amplifier
Figure 35. Follower
Figure 36. Typical Connections of Guard Rings
The designer should be aware that when it is inappropriate to lay out a PC board for the sake of just a few
circuits, there is another technique which is even better than a guard ring on a PC board: Don't insert the
amplifier's input pin into the board at all, but bend it up in the air and use only air as an insulator. Air is an
excellent insulator. In this case you may have to forego some of the advantages of PC board construction, but
the advantages are sometimes well worth the effort of using point-to-point up-in-the-air wiring. See Figure 37.
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