LMC6492 Datasheet, PDF (17/28 Pages) National Semiconductor (TI) – CMOS Rail-to-Rail Input and Output Operational Amplifier

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Inverting Amplifier
LMC6492, LMC6494
SNOS724D – AUGUST 2000 – REVISED MARCH 2013
Non-Inverting Amplifier
Follower
Figure 61. 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 62.
(Input pins are lifted out of PC board and soldered directly to components. All other pins connected to PC board).
Figure 62. Air Wiring
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