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TLC080IP 数据表(PDF) 18 Page - Texas Instruments

部件名 TLC080IP
功能描述  FAMILY OF WIDE-BANDWIDTH HIGH-OUTPUT-DRIVE SINGLE SUPPLY OPERATIONAL AMPLIFIERS
PDF  53 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

TLC080IP 数据表(HTML) 18 Page - Texas Instruments

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VI
VO
C1
+
RG
RF
R1
f
–3dB
1
2pR1C1
V
O
V
I
1
R
F
R
G
1
1
sR1C1
=
( + )(
)
+
=
VI
C2
R2
R1
C1
RF
RG
R1 = R2 = R
C1 = C2 = C
Q = Peaking Factor
(Butterworth Q = 0.707)
(
=
1
Q
2
)
RG
RF
_
+
f
–3dB
1
2pRC
–
=
TLC080 , TLC081, TLC082
TLC083, TLC084, TLC085, TLC08xA
SLOS254F
– JUNE 1999 – REVISED DECEMBER 2011
www.ti.com
General Configurations
When receiving low-level signals, limiting the bandwidth of the incoming signals into theFigure 50 system is often
required. The simplest way to accomplish this is to place an RC filter at the noninverting terminal of the amplifier
(see ).
Figure 50. Single-Pole Low-Pass Filter
If even more attenuation is needed, a multiple pole filter is required. The Sallen-Key filter can be used for this
task. For best results, the amplifier should have a bandwidth that is 8 to 10 times the filter frequency bandwidth.
Failure to do this can result in phase shift of the amplifier.
Figure 51. 2-Pole Low-Pass Sallen-Key Filter
18
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Copyright
© 1999–2011, Texas Instruments Incorporated
Product Folder Link(s): TLC080 TLC081 TLC082 TLC083 TLC084 TLC085 TLC08xA



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