EL5144C Elantec Semiconductor, EL5144C Datasheet - Page 19

• Manufacturer Part Number: EL5144C
• Description: 100 MHz Single Supply Rail to Rail Amplifier
• Manufacturer: Elantec Semiconductor

ground with an R
Amp B turns on and V
put. This break-before-make operation ensures that more
than one amplifier isn’t trying to drive the bus at the
same time. Notice the outputs are tied directly together.
Isolation resistors at each output are not necessary.
Select
Select
V
OUT
5V
0V
5V
0V
10MHz
2.4V
V
5MHz
3V
V
IN
IN
PP
PP
1
2
1
2
3
4
5
6
7
L
C
EL5144C, EL5146C, EL5244C, EL5246C,
L
IN2
time constants. 500 nsec later,
EL5246C
+
+
-
-
is passed through to the out-
Figure 5
Figure 6
14
13
12
11
10
9
8
4.7µF
0.1µF
150
V
+5V
OUT
19
100 MHz Single Supply Rail to Rail Amplifier
Free Running Oscillator Application
Figure 7 is an EL5144C configured as a free running
oscillator. To first order, R
frequency of oscillation according to:
For rail to rail output swings, maximum frequency of
oscillation is around 15 MHz. If reduced output swings
are acceptable, 25 MHz can be achieved. Figure 8 shows
the oscillator for R
F
OSC
= 6 MHz.
V
OUT
5V
0V
470K
470K
1
2
3
F
OSC
OSC
470K
=
= 510
----------------------------------- -
R
Figure 8
Figure 7
OSC
OSC
0.72
and C
5
4
C
0.1µF
, C
EL5444C
OSC
OSC
+5V
OSC
= 240 pF and
determine the
R
C
OSC
OSC