参数资料
型号: TLV2773AQDRQ1
厂商: TEXAS INSTRUMENTS INC
元件分类: 运算放大器
英文描述: DUAL OP-AMP, 5.1 MHz BAND WIDTH, PDSO14
封装: SOIC-14
文件页数: 24/45页
文件大小: 986K
代理商: TLV2773AQDRQ1
TLV277x-Q1, TLV277xA-Q1
FAMILY OF 2.7-V HIGH-SLEW-RATE RAIL-TO-RAIL OUTPUT
OPERATIONAL AMPLIFIERS WITH SHUTDOWN
SGLS179D SEPTEMBER 2003 REVISED AUGUST 2008
30
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
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 59. Output Offset Voltage Model
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
VI
VO
C1
+
RG
RF
R1
f
–3dB +
1
2
pR1C1
V
O
V
I
+
1
)
R
F
R
G
1
) sR1C1
Figure 60. 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 61. 2-Pole Low-Pass Sallen-Key Filter
相关PDF资料
PDF描述
TLV2773QDRQ1 DUAL OP-AMP, 5.1 MHz BAND WIDTH, PDSO14
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TLV2780CDBVTG4 OP-AMP, 4500 uV OFFSET-MAX, 8 MHz BAND WIDTH, PDSO6
TLV2780IDBVTG4 OP-AMP, 4500 uV OFFSET-MAX, 8 MHz BAND WIDTH, PDSO6
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