km4101it6tr3 Fairchild Semiconductor, km4101it6tr3 Datasheet - Page 8

• Manufacturer Part Number: km4101it6tr3
• Description: Low Cost, 2.7v And 5v, 260mhz Rail-to-rail Amplifiers
• Manufacturer: Fairchild Semiconductor

DATA SHEET
8
Driving Capacitive Loads
The Frequency Response vs. C
illustrates the response of the KM4100 and KM4101. A
small series resistance (R
illustrated in Figure 5, will improve stability and
settling performance.
Response vs. C
bandwidth with less than 1dB of peaking. For maximum
flatness, use a larger R
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:
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 5: Typical Topology for driving
R
Overdrive Recovery
Figure 4: Overdrive Recovery
g
L
+
-
plot were chosen to achieve maximum
Input
a capacitive load
Time (20ns/div)
R
s
s
.
f
) at the output of the amplifier,
R
s
values in the Frequency
R
s
L
Output
plot on page 4,
R
V
G = 5
R
L
in
f
= 1kΩ
C
= 2kΩ
=2V
L
pp
R
L
Refer to the evaluation board layouts shown in Figure
7 for more information.
Evaluation Board Information
The following evaluation boards are available to aid
in the testing and layout of this device:
Evaluation board schematics and layouts are shown in
Figure 6 and Figure 7.
The KEB002 and KEB003 evaluation boards are built
for dual supply operation. Follow these steps to use
the board in a single supply application:
Eval Board
KEB002
KEB003
1. Short -V
2. Use C3 and C4, if the -V
KM4101 is not directly connected to the
ground plane.
Figure 6: Evaluation Board Schematic
Single Channel,
Dual Supply 5 & 6 lead SOT23 KM4101IT6
Single Channel, Dual Supply
8 lead SOIC
s
to ground
(SOIC pinout shown)
Description
s
pin of the KM4100 or
REV. 1A February 2001
KM4100/KM4101
KM4100IT5,
KM4100IC8,
KM4101IC8
Products