參數(shù)資料
型號： TLV2464AMJ
廠商： Texas Instruments, Inc.
英文描述： FAMILY OF LOW-POWER RAIL-TO-RAIL INPUT/OUTPUT OPERATIONAL AMPLIFIERS WITH SHUTDOWN
中文描述： 家庭的低功耗軌到軌輸入/輸出運(yùn)算放大器，具有關(guān)斷
文件頁數(shù)： 26/58頁
文件大?。?/td> 1441K
代理商： TLV2464AMJ
SLOS220J JULY 1998 REVISED FEBRUARY 2004
26
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 51).
VI
VO
C1
+
RG
RF
R1
f–3dB
1
2 R1C1
VO
VI
1
RF
RG
1
sR1C1
1
Figure 51. 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 RC
Figure 52. 2-Pole Low-Pass Sallen-Key Filter
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