LMC6464AMWG-QML NSC [National Semiconductor], LMC6464AMWG-QML Datasheet - Page 12

• Manufacturer Part Number: LMC6464AMWG-QML
• Description: Micropower, Rail-to-Rail Input and Output CMOS Operational Amplifier
• Manufacturer: NSC [National Semiconductor]

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Application Information
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
FIGURE 11. Example of Guard Ring in P.C. Board
FIGURE 12. Typical Connections of Guard Rings
Non-Inverting Amplifier
Inverting Amplifier
Follower
Layout
(Continued)
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12
board at all, but bend it up in the air and use only air as an in-
sulator. Air is an excellent insulator. In this case you may
have to forego some of the advantages of PC board con-
struction, but the advantages are sometimes well worth the
effort of using point-to-point up-in-the-air wiring. See Figure
13 .
(Input pins are lifted out of PC board and soldered directly to components.
All other pins connected to PC board.)
FIGURE 13. Air Wiring
DS012051-19