km4111 Fairchild Semiconductor, km4111 Datasheet - Page 7

• Manufacturer Part Number: km4111
• Description: 0.2ma, Low Cost, 2.7v & 5v, 35mhz Rail-to-rail Amplifiers
• Manufacturer: Fairchild Semiconductor

KM4111/KM4121
Layout Considerations
General layout and supply bypassing play major
roles in high frequency performance. Fairchild has
evaluation boards to use as a guide for high frequency
layout and to aid in device testing and characterization.
Follow the steps below as a basis for high frequency
layout:
Refer to the evaluation board layouts shown in Figure 6
for more information.
Evaluation Board Information
The following evaluation boards are available to aid
in the testing and layout of this device:
REV. 1B June 2001
Eval Board
KEB002
I
I
I
I
I
Include 6.8µF and 0.01µF ceramic capacitors
Place the 6.8µF capacitor within 0.75 inches
of the power pin
Place the 0.01µF capacitor within 0.1 inches
of the power pin
Remove the ground plane under and around the
part, especially near the input and output pins to
reduce parasitic capacitance
Minimize all trace lengths to reduce
series inductances
Figure 4: Typical Topology for driving
R
g
Single Channel,
Dual Supply 5 & 6 lead SOT23 KM4121IT6
-
+
a capacitive load
Description
R
f
R
s
C
L
KM4111IT5,
Products
R
L
Evaluation board schematics and layouts are shown in
Figure 5 and Figure 6.
The KEB002 evaluation board is built for dual supply
operation. Follow these steps to use the board in a
single supply application:
1. Short -V
2. Use C3 and C4, if the -V
or KM4121 is not directly connected to the
ground plane.
Figure 5: Evaluation Board Schematic
s
to ground
s
pin of the KM4111
DATA SHEET
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