參數(shù)資料
型號: TLV2711Y
廠商: Texas Instruments, Inc.
英文描述: Advanced LinCMOSE RAIL-TO-RAIL MICROPOWER SINGLE OPERATIONAL AMPLIFIERS
中文描述: 高級LinCMOSE軌至軌微功耗單運算放大器
文件頁數(shù): 24/28頁
文件大?。?/td> 551K
代理商: TLV2711Y
TLV2711, TLV2711Y
Advanced LinCMOS
RAIL-TO-RAIL
MICROPOWER SINGLE OPERATIONAL AMPLIFIERS
SLOS196 – AUGUST 1997
24
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
UNITY-GAIN BANDWIDTH
vs
LOAD CAPACITANCE
CL – Load Capacitance – pF
áá
áá
B
60
10
40
0
101
80
50
70
20
30
102
103
104
105
TA = 25
°
C
106
Figure 52
APPLICATION INFORMATION
driving large capacitive loads
The TLV2711 is designed to drive larger capacitive loads than most CMOS operational amplifiers. Figure 50
and Figure 51 illustrate its ability to drive loads up to 600 pF while maintaining good gain and phase margins
(R
null
= 0).
A smaller series resistor (R
null
) at the output of the device (see Figure 53) improves the gain and phase margins
when driving large capacitive loads. Figure 50 and Figure 51 show the effects of adding series resistances of
500
and 1000
. 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
×
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 :
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