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參數(shù)資料
| 型號(hào)： | CLC440 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | High-Speed, Low-Power, Voltage Feedback Op Amp |
| 中文描述： | 高速，低功耗，電壓反饋運(yùn)算放大器 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 316K |
| 代理商： | CLC440 |
The capacitances are defined as:
C
in
= Internal Input Capacitance of the CLC440
(typ 1.2pF)
C
d
= Equivalent Diode Capacitance
C
f
= Feedback Capacitance
The transimpedance plot in the typical performance
section provides the recommended C
f
and expected
bandwidth for different gains and diode capacitances.
The feedback capacitances indicated on the plot
give optimum gain flatness and stability.
capacitance is used, then peaking will occur.
frequency response shown in Figure 4 illustrates the
influence of the feedback capacitance on gain flatness.
If a smaller
The
Figure 4
The total input current noise density (i
ni
) for the basic
transimpedance configuration is shown in Equation 3.
The plot of current noise density versus feedback
resistance is shown in Figure 5.
Figure 5
Equation 3:Total Equivalent Input Referred Current
Noise Density
Rectifier
The large bandwidth of the CLC440 allows for high speed
rectification.
A common rectifier topology is shown in
Figure 6. R
1
and R
2
set the gain of the rectifier. V
out
for
a 5MHz, 2V
pp
sinusoidal input is shown in Figure 7.
Figure 6: Rectifier Topology
Figure 7: Rectifier Output
Tunable Low Pass Filter
The center frequency of the low pass filter (LPF) can be
adjusted by varying the CLC522 gain control voltage, V
g
.
Figure 8: Tunable Low Pass Filter
Transimpedance Amplifier
Frequency Response
G
Frequency (Hz)
10k
1M
40
60
100k
30
20
50
70
80
10M
100M
1G
I
in
-
+
CLC440
5
pF
1k
C
f
100
C
f
= 0
C
f
= 1pF
C
f
= 2pF
C
f
= 5pF
C
f
= 2.5pF
Current Noise Density vs.
Feedback Resistance
C
√
H
Feedback Resistance (k
)
0.1
10
i
ni
10
15
20
25
1.0
5
0
30
35
40
i
f
i
n
e
n
R
f
(Total)
V
in
-
+
CLC440
R
2
R
1
D
2
D
1
V
out
Rectifier Output
V
o
Time (ns)
0
200
-1.2
-1.6
-0.8
-0.4
0.4
100
-2.0
0
0.8
1.2
2.0
300
400
500
1.6
Q
k
RC
R R C C
2
1 2
=
V
in
-
+
CLC440
R
R
2
R
T
V
out
C
2
-
+
CLC440
-
+
CLC522
R
1
C
1
R
in
R
g
R
a
R
f
20
V
g
ω
o
R R C C
k
=
R
V
1.8mA
g
in (max)
=
A
k
1.85R
R
v (max)
f
g
=
=
i
i
e
R
4kT
R
ni
n
n2
f
2
f
=
+
+
http://www.national.com
6
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CLC440 WAF | 制造商:Texas Instruments 功能描述: |
| CLC440A8B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
| CLC440AJE | 制造商:National Semiconductor Corporation 功能描述:OP AMP HIGH SPEED LOW POWER VOLTAGE FEEDBACK |
| CLC440AJP | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:National Semiconductor Corporation 功能描述:old nsc |
| CLC440M WAF | 制造商:Texas Instruments 功能描述: |
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