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| 型號： | 27L2AI |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | LinCMOSE PRECISION DUAL OPERATIONAL AMPLIFIERS |
| 中文描述： | LinCMOSE精密雙運算放大器 |
| 文件頁數(shù)： | 28/33頁 |
| 文件大?。?/td> | 538K |
| 代理商： | 27L2AI |
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TLC27L2, TLC27L2A, TLC27L2B, TLC27L7
LinCMOS
PRECISION DUAL OPERATIONAL AMPLIFIERS
SLOS052B – OCTOBER 1987 – REVISED AUGUST 1994
28
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
output characteristics (continued)
(b) CL = 260 pF, RL = NO LOAD
(a) CL = 20 pF, RL = NO LOAD
VI
–2.5 V
CL
VO
2.5 V
–
+
TA = 25
°
C
f = 1 kHz
VI(PP) = 1 V
(d) TEST CIRCUIT
(c) CL = 310 pF, RL = NO LOAD
Figure 41. Effect of Capacitive Loads and Test Circuit
Although the TLC27L2 and TLC27L7 possess excellent high-level output voltage and current capability,
methods for boosting this capability are available, if needed. The simplest method involves the use of a pullup
resistor (R
P
) connected from the output to the positive supply rail (see Figure 42). There are two disadvantages
to the use of this circuit. First, the NMOS pulldown transistor N4 (see equivalent schematic) must sink a
comparatively large amount of current. In this circuit, N4 behaves like a linear resistor with an on-resistance
between approximately 60
and 180
, depending on how hard the operational amplifier input is driven. With
very low values of R
P
, a voltage offset from 0 V at the output occurs. Second, pullup resistor R
P
acts as a
drain load to N4 and the gain of the operational amplifier is reduced at output voltage levels where N5 is not
supplying the output current.
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| 27L2C | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LinCMOSE PRECISION DUAL OPERATIONAL AMPLIFIERS |
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