FAN4113 Fairchild Semiconductor, FAN4113 Datasheet - Page 7

• Manufacturer Part Number: FAN4113
• Description: 1.2V/ 36MHz/ Low Power Rail-to-Rail Amplifier
• Manufacturer: Fairchild Semiconductor

FAN4113
REV. 1 October 2001
Application Information
General Description
The FAN4113 is single supply, general purpose, voltage-feedback
amplifier. The FAN4113 is fabricated on a complimentary bipolar
process, features a rail-to-rail output, and is unity gain stable.
The typical non-inverting circuit schematic is shown in Figure 1.
RR Applications and Beyond
The FAN4113 can be used with input signals that exceed
its common mode input voltage range. Simply attenuate the
input signal and increase the gain of the FAN4113, see
Figure 2. First, select A 1 so the FAN4113 common voltage
range is not exceeded. Second, select R f and R g to get the
desired overall gain for signal V in . Finally, pick V DC for the
desired output offset.
V
Figure 1: Typical Non-inverting Configuration
in
*
Figure 2: RR Applications and Beyond
A
In
1
=
R
1
R
1
R
R
+ R
2
g
R
2
FAN4113
2
-
+
+V
V
DC
s
R
g
0.01µF
6.8µF
V o = A 1 V in 1+
+
–
R
+
f
R
f




R g
R f
Out




−V
DC
V
o
R g
R f
Power Dissipation
The maximum internal power dissipation allowed is directly
related to the maximum junction temperature. If the maximum
junction temperature exceeds 150°C, some performance
degradation will occur. It the maximum junction temperature
exceeds 175°C for an extended time, device failure may occur.
Overdrive Recovery
Overdrive of an amplifier occurs when the output and/or input
ranges are exceeded. The recovery time varies based on
whether the input or output is overdriven and by how much
the ranges are exceeded. The FAN4113 will typically recover
in less than 50ns from an overdrive condition. Figure 3
shows the FAN4113 in an overdriven condition.
Driving Capacitive Loads
The Frequency Response vs. C L plot, illustrates the response
of the FAN4113. A small series resistance (R s ) at the output
of the amplifier, illustrated in Figure 4, will improve stability
and settling performance.
Figure 4: Typical Topology for driving
R
Figure 3: Overdrive Recovery
g
G = 5V
V
s
= 2.7V
-
+
a capacitive load
Time (200µs/div)
R
Input
f
R
s
Output
C
L
DATA SHEET
R
L
7