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LMV792MM データシート(PDF) 21 Page - Texas Instruments

部品番号 LMV792MM
部品情報  17-MHz, Low-Noise, CMOS Input, 1.8-V Operational Amplifiers
PDF  34 Pages
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI1 - Texas Instruments

LMV792MM データシート(HTML) 21 Page - Texas Instruments

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10k
100k
1M
10M
FREQUENCY (Hz)
50
60
70
80
90
100
110
120
130
CIN = 50 pF, CF = 1.5 pF
CIN = 100 pF, CF = 2 pF
CIN = 200 pF, CF = 3 pF
10k
100k
1M
10M
FREQUENCY (Hz)
50
55
60
65
70
75
80
85
90
95
100
CIN = 50 pF, CF = 4.5 pF
CIN = 100 pF, CF = 6 pF
CIN = 200 pF, CF = 9 pF
+
RF
-
CF
IF RA < < RF
CFc = ¨
©
§
1 +
RB
RA
RA
CFc
RB
LMV791, LMV792
www.ti.com
SNOSAG6G – SEPTEMBER 2005 – REVISED OCTOBER 2015
Typical Applications (continued)
Figure 52. Obtaining Small CF from large CF′
8.2.2 Application Curves
The LMV791 was used to design a number of amplifiers with varying transimpedance gains and source
capacitances. The gains, bandwidths and feedback capacitances of the circuits created are summarized in
Table 1. The frequency responses are presented in Figure 53 and Figure 54. The feedback capacitances are
slightly different from the formula in Equation 3, because the parasitic capacitance of the board and the feedback
resistor RF had to be accounted for.
Table 1. Frequency Response Results
Transimpedance, ATI
CIN
CF
3-dB Frequency
470000
50 pF
1.5 pF
350 kHz
470000
100 pF
2.0 pF
250 kHz
470000
200 pF
3.0 pF
150 kHz
47000
50 pF
4.5 pF
1.5 MHz
47000
100 pF
6.0 pF
1 MHz
47000
200 pF
9.0 pF
700 kHz
Figure 54. Frequency Response for ATI = 47000
Figure 53. Frequency Response for ATI = 470000
Copyright © 2005–2015, Texas Instruments Incorporated
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Product Folder Links: LMV791 LMV792



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