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參數(shù)資料
| 型號(hào)： | CLC425ALC |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Faceplate; Enclosure Color:Off White RoHS Compliant: Yes |
| 中文描述： | OP-AMP, 800 uV OFFSET-MAX, 1900 MHz BAND WIDTH, UUC |
| 封裝： | DIE |
| 文件頁數(shù)： | 7/9頁 |
| 文件大?。?/td> | 1275K |
| 代理商： | CLC425ALC |
Inverting Gains Less Than 10V/V
The lag compensation of Figure 9 will achieve stability
for lower gains. Placing the network between the two
input terminals does not affect the closed-loop nor noise
gain, but is best used for the invering configuration
because of its affect on the non-inverting input imped-
ance.
Single-Supply Operation
The CLC425 can be operated with single power supply
as shown iin Figure 10. Both the input and output are
capacitively coupled to set the dc operating point.
Low Noise Transimpedance Amplifier
The circuit of Figure 11 implements a low-noise transim-
pedance amplifier commonly used with photo-diodes.
The transimpedance gain is set by R
f
. The simulated
frequency response is shown in Figure 12 and shows
the influence C
f
has over gain flatness. Equation 4
provides the total input current noise density (i
ni
) equa-
tion for the basic transimpedance configuration and is
plotted against feedback resistance (R
f
) showing all
contributing noise sources in Figure 13. This plot indi-
cates the expected total equivalent input current noise
density (i
ni
) for a given feedback resistance (R
f
). The total
equivalent output voltage noise density (e
no
) is i
ni
R
f
.
Very Low Noise Figure Amplifier
The circuit of Figure 14 implements a very low Noise
Figure amplifier using a step-up transformer combined
with a CLC425 and a CLC404. The circuit is configured
with a gain of 35.6dB. The circuit achieves measured
Noise Figures of less than 2.5dB in the 10-40MHz
region. 3
rd
order intercepts exceed +30dBm for frequen-
cies less than 40MHz and gain flatness of 0.5dB is measured
in the 1-50MHz pass bands. Application Note OA-14 provides
greater detail on these low Noise Figure techniques.
R
f
R
b
CLC425
+V
cc
C
f
Figure 11: Transimpedance Amplifier Configuration
A
I
R
v
in
f
=
R
f=
124
R
s=
75
R
g=
124
CLC425
R
in
75
C
in
39pF
C
f=
10pF
I
cc
=5mA
75
75
Figure 8: External Shunt Compensation
Figure 12: Transimpedance Amplifier Frequency Response
R
g
R
f
R
b
R
L
CLC425
R
V
out
R
out
V
in
C
7
http://www.national.com
Figure 9: External Lag Compensation
R
f
R
R
L
R
out
C
C
C
R
R
g
V
ac
V
cc
V
cc
CLC425
V
cc
2
V
cc
2
+ A
v
V
ac
V
out
=
Figure 10: Single Supply Operation
Equation 4: Total Equivalent Input Refered Current
i
i
ni
n
n
f
f
e
R
kT
R
=
+
+
2
2
4
Figure 13: Current Noise Density vs. Feedback Resistance
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CLC425 | Ultra Low Noise Wideband Op Amp |
| CLC425AMC | Ultra Low Noise Wideband Op Amp |
| CLC425AJM5 | Ultra Low Noise Wideband Op Amp |
| CLC425A8B | Ultra Low Noise Wideband Op Amp |
| CLC426 | Wideband, Low-Noise, Voltage Feedback Op Amp |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CLC425AMC | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Ultra Low Noise Wideband Op Amp |
| CLC426 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Wideband, Low-Noise, Voltage Feedback Op Amp |
| CLC426A8B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
| CLC426AIB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
| CLC426AJE | 制造商:Texas Instruments 功能描述:Operational Amplifier, Single AMP, Bipolar, 8 Pin, Plastic, SOP |
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