參數(shù)資料
型號(hào): TLV2780CDBVTG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 運(yùn)算放大器
英文描述: OP-AMP, 4500 uV OFFSET-MAX, 8 MHz BAND WIDTH, PDSO6
封裝: GREEN, PLASTIC, SOT-23, 6 PIN
文件頁(yè)數(shù): 6/44頁(yè)
文件大?。?/td> 1563K
代理商: TLV2780CDBVTG4
TLV2780, TLV2781, TLV2782, TLV2783, TLV2784, TLV2785, TLV278xA
FAMILY OF 1.8 V HIGHSPEED RAILTORAIL INPUT/OUTPUT
OPERATIONAL AMPLIFIERS WITH SHUTDOWN
SLOS245E MARCH 2000 REVISED JANUARY 2005
14
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 32).
VI
VO
C1
+
RG
RF
R1
f
–3dB +
1
2
pR1C1
V
O
V
I
+
1
)
R
F
R
G
1
) 2pfR1C1
Figure 32. 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 33. 2-Pole Low-Pass Sallen-Key Filter
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TLV2780IDBVR 功能描述:運(yùn)算放大器 - 運(yùn)放 Single 1.8V RRIO 8MHz RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比(最小值):63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流(最大值):10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
TLV2780IDBVRG4 功能描述:運(yùn)算放大器 - 運(yùn)放 Single 1.8V RRIO 8MHz RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比(最小值):63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流(最大值):10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
TLV2780IDBVT 功能描述:運(yùn)算放大器 - 運(yùn)放 Single 1.8V RRIO 8MHz RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比(最小值):63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流(最大值):10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel