Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

FAN4272 Datasheet(PDF) 7 Page - Fairchild Semiconductor

Part No. FAN4272
Description  Dual, Low Cost, 2.7V & 5V, Rail-to-Rail I/O Amplifier
Download  11 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN4272 Datasheet(HTML) 7 Page - Fairchild Semiconductor

Back Button FAN4272 Datasheet HTML 3Page - Fairchild Semiconductor FAN4272 Datasheet HTML 4Page - Fairchild Semiconductor FAN4272 Datasheet HTML 5Page - Fairchild Semiconductor FAN4272 Datasheet HTML 6Page - Fairchild Semiconductor FAN4272 Datasheet HTML 7Page - Fairchild Semiconductor FAN4272 Datasheet HTML 8Page - Fairchild Semiconductor FAN4272 Datasheet HTML 9Page - Fairchild Semiconductor FAN4272 Datasheet HTML 10Page - Fairchild Semiconductor FAN4272 Datasheet HTML 11Page - Fairchild Semiconductor  
Zoom Inzoom in Zoom Outzoom out
 7 / 11 page
background image
FAN4272
DATA SHEET
Rev. 2 December 2002
7
Application Information
General Description
The FAN4272 is single supply, general purpose, voltage-feed-
back amplifier. The FAN4272 is fabricated on a complementary
bipolar process, features a rail-to-rail input and output, and is
unity gain stable.
The typical non-inverting circuit schematic is shown in Figure 1.
Figure 1: Typical Non-inverting Configuration
Input Common Mode Voltage
The common mode input range extends to 250mV below
ground and to 250mV above Vs, in single supply operation.
Exceeding these values will not cause phase reversal. However,
if the input voltage exceeds the rails by more than 0.5V, the
input ESD devices will begin to conduct. The output will
stay at the rail during this overdrive condition. If the absolute
maximum input voltage (700mV beyond either rail) is
exceeded, externally limit the input current to ±5mA as shown
in Figure 2.
Figure 2: Circuit for Input Current Protection
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 FAN4272 will typically recover
in less than 50ns from an overdrive condition. Figure 3
shows the FAN4272 in an overdriven condition.
Figure 3: Overdrive Recovery
Driving Capacitive Loads
The Frequency Response vs. CL plot, illustrates the response
of the FAN4272. A small series resistance (Rs) at the output
of the amplifier, illustrated in Figure 4, will improve stability
and settling performance. Rs values in the Frequency Response
vs. CL plot were chosen to achieve maximum bandwidth with
less than 2dB of peaking. For maximum flatness, use a larger
Rs. Capacitive loads larger than 200pF require the use of Rs.
Figure 4: Typical Topology for driving
a capacitive load
Driving a capacitive load introduces phase-lag into the output
signal, which reduces phase margin in the amplifier. The
unity gain follower is the most sensitive configuration. In a
unity gain follower configuration, the FAN4272 requires a
75
Ω series resistor to drive a 100pF load.
Time (µs)
-0.5
1.5
2.5
3.5
4.5
5.5
10
20
30
40
50
60
70
80
0.5
0
Output
Input
G = 5
-
+
10kΩ
Vo
FAN4272
Vin
+
-
Rf
Rg
Rs
CL
RL
+
-
FAN4272
Rf
0.01µF
6.8µF
Out
In
+Vs
+
Rg


Html Pages

1  2  3  4  5  6  7  8  9  10  11 


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn