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TSH110ILT 数据表(PDF) 16 Page - STMicroelectronics

部件名 TSH110ILT
功能描述  WIDE BAND, LOW NOISE OPERATIONAL AMPLIFIERS
PDF  19 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

TSH110ILT 数据表(HTML) 16 Page - STMicroelectronics

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TSH110-TSH111-TSH112-TSH113-TSH114
16/19
(fig.38): Input / Output Isolation vs. Frequency..
Choice of the Feedback Circuit
The TSH11x is a serie of current feedback
amplifiers. For a current feedback structure the
bandwidth depends on the value of the feedback
components and the value of supply voltage.
A good choice of these components is necessary
to achieve the gain flatness and the stability.
The following table shows the typical -3dB
bandwidth
and
0.1dB
bandwidth
assuming
different gains and power supply on 100
Ω load.
Please see also the Closed Loop Gain vs.
Frequency curves on page 8 of the datasheet.
(fig.39): Non-inverting and Inverting Implementation..
(tab.1): Closed-loop Gain and Feedback Components.
Inverting Amplifier Biasing
In this case a resistance (R on fig.40) is necessary
to achieve a good input biasing.
This resistance is calculated by assuming the
negative and positive input bias current. The aim
is to make the compensation of the offset bias
current which could affect the input offset voltage
and the output DC component.
Assuming Ib-, Ib+, Rin, Rfb and a zero volt output,
the resistance R comes : R = Rin // Rfb .
(fig.40): Compensation of the Input Bias Current..
0.01
0.1
1
10
100
-120
-100
-80
-60
-40
-20
0
Standby mode
Frequency (M Hz)
+
_
RG
50
Ω
Output
49.9
Ω
Rfb
Cfb
Input
Non-Inverting
Gain = 1+ Rfb / RG
+
_
R
50
Ω
Output
49.9
Ω
Rfb
Cfb
Inverting
Gain = - Rfb / Rin
Rin
Input
+
_
RG
50
Ω
Output
49.9
Ω
Rfb
Cfb
Input
Non-Inverting
Gain = 1+ Rfb / RG
+
_
R
50
Ω
Output
49.9
Ω
Rfb
Cfb
Inverting
Gain = - Rfb / Rin
Rin
Input
VCC
(V)
Gain
Rfb
(
Ω)
Cfb
(pF)
-3dB
Bw
(MHz)
0.1dB
Bw
(MHz)
±6
+10
510
-
46
14
-10
510
-
42
13
+2
680
2
105
50
-2
680
2
90
40
+1
2.2k
2
170
30
-1
2.2k
2
110
20
±2.5
+10
510
-
37
13
-10
510
-
36
12
+2
680
2
93
25
-2
680
2
86
30
+1
2.2k
2
130
50
-1
2.2k
2
100
18
+
_
R
Load
Output
Rfb
Rin
Ib-
Ib+
Vcc+
Vcc-
+
_
R
Load
Output
Rfb
Rin
Ib-
Ib+
Vcc+
Vcc-



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