參數(shù)資料
型號(hào)： TLV2731Y
廠商： Texas Instruments, Inc.
英文描述： Advanced Lincmos Rail-to-Rail Output Wide-Input-Voltage Single OP AMP(先進(jìn)的LINCMOS滿量程輸出,低功耗單運(yùn)放)
中文描述： 高級(jí)Lincmos軌到軌輸出寬輸入電壓?jiǎn)芜\(yùn)算放大器（先進(jìn)的LINCMOS滿量程輸出，低功耗單運(yùn)放）
文件頁(yè)數(shù)： 25/28頁(yè)
文件大小： 620K
代理商： TLV2731Y
TLV2731, TLV2731Y
Advanced LinCMOS
RAIL-TO-RAIL
LOW-POWER SINGLE OPERATIONAL AMPLIFIERS
SLOS198A
–
AUGUST 1997
–
REVISED MARCH 2001
25
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
driving large capacitive loads
The TLV2731 is designed to drive larger capacitive loads than most CMOS operational amplifiers. Figure 49
through Figure 54 illustrate its ability to drive loads greater than 100 pF while maintaining good gain and phase
margins (R
null
= 0).
A small series resistor (R
null
) at the output of the device (see Figure 55) improves the gain and phase margins
when driving large capacitive loads. Figure 49 through Figure 52 show the effects of adding series resistances
of 50
, 100
, 500
, and 1000
. The addition of this series resistor has two effects: the first effect is that
it adds a zero to the transfer function and the second effect is that it reduces the frequency of the pole associated
with the output load in the transfer function.
The zero introduced to the transfer function is equal to the series resistance times the load capacitance. To
calculate the approximate improvement in phase margin, equation 1 can be used.
φ
m1
tan
–
1
2
× π ×
UGB
W
×
Rnull
×
CL
φ
m1
UGBW
R
null
Improvement in phase margin
Unity-gain bandwidth frequency
Output series resistance
Load capacitance
C
L
(1)
Where :
The unity-gain bandwidth (UGBW) frequency decreases as the capacitive load increases (see Figure 53 and
Figure 54). To use equation 1, UGBW must be approximated from Figure 53 and Figure 54.
VDD
–
/GND
VDD+
Rnull
CL
VI
+
–
RL
Figure 55. Series-Resistance Circuit
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TLV274CD 功能描述:運(yùn)算放大器 - 運(yùn)放 550-uA/Ch 3-MHz R-to-R Otpt Oper Amp 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
TLV274CDG4 功能描述:運(yùn)算放大器 - 運(yùn)放 550uA/Ch 3MHz Rail to Rail Output 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
TLV274CDR 功能描述:運(yùn)算放大器 - 運(yùn)放 550-uA/Ch 3-MHz R-to-R Otpt Oper Amp 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
TLV274CDRG4 功能描述:運(yùn)算放大器 - 運(yùn)放 550-uA/Ch 3-MHz R-to-R Otpt Oper Amp 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
TLV274CPW 功能描述:運(yùn)算放大器 - 運(yùn)放 550-uA/Ch 3-MHz R-to-R Otpt Oper Amp 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
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