参数资料
型号: TLC071AIPE4
厂商: TEXAS INSTRUMENTS INC
元件分类: 运算放大器
英文描述: OP-AMP, 2000 uV OFFSET-MAX, 10 MHz BAND WIDTH, PDIP8
封装: ROHS COMPLIANT, PLASTIC, DIP-8
文件页数: 13/53页
文件大小: 1664K
代理商: TLC071AIPE4
TLC070, TLC071, TLC072, TLC073, TLC074, TLC075, TLC07xA
FAMILY OF WIDEBANDWIDTH HIGHOUTPUT DRIVE SINGLE SUPPLY
OPERATIONAL AMPLIFIERS
SLOS219E JUNE 1999 REVISED SEPTEMBER 2006
20
WWW.TI.COM
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
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
) 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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