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參數(shù)資料
| 型號： | FAN4272 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Dual, Low Cost, +2.7V & +5V, Rail-to-Rail I/O Amplifier |
| 中文描述： | 雙路，低成本，2.7 |
| 文件頁數(shù)： | 7/11頁 |
| 文件大?。?/td> | 289K |
| 代理商： | FAN4272 |
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 V
s
, 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. C
L
plot, illustrates the response
of the FAN4272. A small series resistance (R
s
) at the output
of the amplifier, illustrated in Figure 4, will improve stability
and settling performance. R
s
values in the
Frequency Response
vs. C
L
plot were chosen to achieve maximum bandwidth with
less than 2dB of peaking. For maximum flatness, use a larger
R
s
. Capacitive loads larger than 200pF require the use of R
s
.
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
series resistor to drive a 100pF load.
A
Time (
μ
s)
-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
-
+
10k
V
o
FAN4272
V
in
+
-
R
f
R
g
R
s
C
L
R
L
+
FAN4272
-
R
f
0.01
μ
F
6.8
μ
F
+
Out
In
+V
s
R
g
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FAN4272AM8X | 功能描述:高速運算放大器 RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| FAN4272AMU8X | 功能描述:高速運算放大器 RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| FAN4272M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
| FAN4272MA | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
| FAN4272MAX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
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