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參數(shù)資料
| 型號： | KM7101 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Ultra-Low Cost, 139A, +2.7V, 4.9MHz Rail-to-Rail I/O Amplifier |
| 中文描述： | 超低成本，139A條，為2.7V，4.9MHz軌至軌I / O放大器 |
| 文件頁數(shù)： | 6/9頁 |
| 文件大?。?/td> | 146K |
| 代理商： | KM7101 |
General Description
The KM7101 is single supply, general purpose,voltage-
feedback amplifier that is pin-for-pin compatible with
the National Semiconductor LMC7101. The KM7101
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 max-
imum 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 over-
driven and by how much the ranges are exceeded.
The KM7101 will typically recover in less than 50ns
from an overdrive condition. Figure 3 shows the
KM7101 in an overdriven condition.
Figure 3: Overdrive Recovery
Driving Capacitive Loads
The
Frequency Response vs. C
L
plot, illustrates the
response of the KM7101. 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
. As the plot indicates, the KM7101 can easily drive
a 50pF capacitive load without a series resistance.
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 KM7101 requires a 510
series resistor to drive a
100pF load.
+
KM7101
-
R
f
0.01
μ
F
6.8
μ
F
+
Out
In
+V
s
R
g
I
Time (10
μ
s/div)
Output
Input
G = 5
-
+
10k
V
o
KM7101
V
in
+
-
R
f
R
g
R
s
C
L
R
L
DATA SHEET
KM7101
6
REV. 1B March 2001
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KM7101IT5 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Ultra-Low Cost, 139A, +2.7V, 4.9MHz Rail-to-Rail I/O Amplifier |
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| KM710N-LFR | 制造商:FRONTIER 制造商全稱:Frontier Electronics. 功能描述:10mm Adjustable Unshielded IFT Coils |
| KM711N | 制造商:FRONTIER 制造商全稱:Frontier Electronics. 功能描述:10mm Adjustable Unshielded IFT Coils |
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