參數(shù)資料
型號(hào)： 5962-9564001NXD
廠商： TEXAS INSTRUMENTS INC
元件分類： 運(yùn)算放大器
英文描述： DUAL OP-AMP, 1500 uV OFFSET-MAX, PDSO8
封裝： MS-012-AA, PLSATIC, SO-8
文件頁(yè)數(shù)： 41/69頁(yè)
文件大?。?/td> 1673K
代理商： 5962-9564001NXD
TLC225x, TLC225xA
Advanced LinCMOS
RAIL-TO-RAIL
VERY LOW-POWER OPERATIONAL AMPLIFIERS
SLOS176D – FEBRUARY 1997 – REVISED MARCH 2001
46
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
driving large capacitive loads
The TLC225x is designed to drive larger capacitive loads than most CMOS operational amplifiers. Figure 56
and Figure 57 illustrate its ability to drive loads up to 1000 pF while maintaining good gain and phase margins
(Rnull = 0).
A smaller series resistor (Rnull) at the output of the device (see Figure 60) improves the gain and phase margins
when driving large capacitive loads. Figure 56 and Figure 57 show the effects of adding series resistances of
10
, 50 , 100 , 200 , and 500 . The addition of this series resistor has two effects: the first is that it adds
a zero to the transfer function and the second 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 improvement in phase margin, equation 1 can be used.
φ
m1 + tan
–1
2
× π× UGBW × R
null ×
C
L
Where :
(1)
φ
m1 + Improvement in phase margin
UGBW
+ Unity-gain bandwidth frequency
R
null + Output series resistance
C
L + Load capacitance
The unity-gain bandwidth (UGBW) frequency decreases as the capacitive load increases (see Figure 58). To
use equation 1, UGBW must be approximated from Figure 58.
Using equation 1 alone overestimates the improvement in phase margin, as illustrated in Figure 59. The
overestimation is caused by the decrease in the frequency of the pole associated with the load, thus providing
additional phase shift and reducing the overall improvement in phase margin.
Using Figure 60, with equation 1 enables the designer to choose the appropriate output series resistance to
optimize the design of circuits driving large capacitance loads.
50 k
50 k
VDD – /GND
VDD +
Rnull
CL
VI
+
–
Figure 60. Series-Resistance Circuit
相關(guān)PDF資料
PDF描述
5962-9564001Q2A DUAL OP-AMP, 1750000 uV OFFSET-MAX, 0.21 MHz BAND WIDTH, CQCC20
5962-9564001QHA DUAL OP-AMP, 1750000 uV OFFSET-MAX, 0.21 MHz BAND WIDTH, CDFP10
5962-9564001QPA DUAL OP-AMP, 1750000 uV OFFSET-MAX, 0.21 MHz BAND WIDTH, CDIP8
5962-9564003Q2A DUAL OP-AMP, 1000000 uV OFFSET-MAX, 0.21 MHz BAND WIDTH, CQCC20
5962-9564003QHA DUAL OP-AMP, 1000000 uV OFFSET-MAX, 0.21 MHz BAND WIDTH, CDFP10
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
5962-9564001NXDR 制造商:Texas Instruments 功能描述:OP Amp Dual GP R-R O/P
5962-9564002Q2A 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述:5962-9564002Q2A, QUAD OP AMP - Rail/Tube
5962-9564003NXD 功能描述:運(yùn)算放大器 - 運(yùn)放 R-R uPwr Prec Adv LinCMOS Dual Op 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
5962-9564003NXDR 制造商:Texas Instruments 功能描述:OP Amp Dual GP R-R O/P
5962-9564003Q2A 制造商:Texas Instruments 功能描述: 制造商:Texas Instruments 功能描述:5962-9564003Q2A, DUAL OP AMP - Rail/Tube
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