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TLC072A Datasheet(HTML) 18 Page - Texas Instruments

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Part No. TLC072A
Description  FAMILY OF WIDE BAND WIDTH HIGH OUTPUT DRIVE SINGLE SUPPLY OPERATIONAL AMPLIFIERS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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TLC072A Datasheet(HTML) 18 Page - Texas Instruments

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TLC070, TLC071, TLC072, TLC073, TLC074, TLC075, TLC07xA
FAMILY OF WIDEBANDWIDTH HIGHOUTPUT DRIVE SINGLE SUPPLY
OPERATIONAL AMPLIFIERS
SLOS219D − JUNE 1999 − REVISED FEBRUARY 2004
18
WWW.TI.COM
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251−1443
APPLICATION INFORMATION
driving a capacitive load
When the amplifier is configured in this manner, capacitive loading directly on the output will decrease the
device’s phase margin leading to high frequency ringing or oscillations. Therefore, for capacitive loads of greater
than 10 pF, it is recommended that a resistor be placed in series (RNULL) with the output of the amplifier, as
shown in Figure 47. A minimum value of 20
Ω should work well for most applications.
CLOAD
RF
Input
Output
RG
RNULL
_
+
Figure 47. Driving a Capacitive Load
offset voltage
The output offset voltage, (VOO) is the sum of the input offset voltage (VIO) and both input bias currents (IIB) times
the corresponding gains. The following schematic and formula can be used to calculate the output offset
voltage:
V
OO +
V
IO
1
)
R
F
R
G
" I
IB
)
R
S
1
)
R
F
R
G
" I
IB–
R
F
+
VI
+
RG
RS
RF
IIB−
VO
IIB+
Figure 48. Output Offset Voltage Model


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