LPC661AI National Semiconductor Corporation, LPC661AI Datasheet - Page 10

• Manufacturer Part Number: LPC661AI
• Description: LPC661 - Low Power CMOS Operational Amplifier, Package: Soic Narrow, Pin Nb=8
• Manufacturer: National Semiconductor Corporation

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Application Hints
FIGURE 6. Non-Inverting Amplifier
FIGURE 5. Inverting Amplifier
Guard Ring Connections
Guard Ring Connections
Guard Ring Connections
FIGURE 7. Follower
FIGURE 4. Example of Guard Ring in P.C. Board Layout, Using the LPC660
(Continued)
DS011227-11
DS011227-9
DS011227-10
10
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 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
9 .
FIGURE 8. Howland Current Pump
Guard Ring Connections
DS011227-8
DS011227-12