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TLC080 датащи(PDF) 20 Page - Texas Instruments

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номер детали TLC080
подробное описание детали  FAMILY OF WIDE-BANDWIDTH HIGH-OUTPUT-DRIVE SINGLE SUPPLY OPERATIONAL AMPLIFIERS
PDF  51 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

TLC080 датащи(HTML) 20 Page - Texas Instruments

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TLC080, TLC081, TLC082, TLC083, TLC084, TLC085, TLC08xA
FAMILY OF WIDEBANDWIDTH HIGHOUTPUT DRIVE SINGLE SUPPLY
OPERATIONAL AMPLIFIERS
SLOS254E − JUNE 1999 − REVISED APRIL 2006
20
WWW.TI.COM
APPLICATION INFORMATION
general configurations
When receiving low-level signals, limiting the bandwidth of the incoming signals into the 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).
VI
VO
C1
+
−
RG
RF
R1
f
–3dB +
1
2
pR1C1
V
O
V
I
+
1
)
R
F
R
G
1
1
) sR1C1
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.
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
2
pRC
Figure 51. 2-Pole Low-Pass Sallen-Key Filter



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