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| 型號： | LT1014AFK |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | QUAD PRECISION OPERATIONAL AMPLIFIERS |
| 中文描述： | 四高精度運算放大器 |
| 文件頁數(shù)： | 18/30頁 |
| 文件大?。?/td> | 631K |
| 代理商： | LT1014AFK |
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LT1014, LT1014A, LT1014D
QUAD PRECISION OPERATIONAL AMPLIFIERS
SLOS039C – JULY 1989 – REVISED SEPTEMBER 1999
18
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
single-supply operation
The LT1014 is fully specified for single-supply operation (V
CC–
= 0). The common-mode input voltage range
includes ground, and the output swings within a few millivolts of ground.
Furthermore, the LT1014 has specific circuitry that addresses the difficulties of single-supply operation, both
at the input and at the output. At the input, the driving signal can fall below 0 V, either inadvertently or on a
transient basis. If the input is more than a few hundred millivolts below ground, the LT1014 is designed to deal
with the following two problems that can occur:
1.
On many other operational amplifiers, when the input is more than a diode drop below ground, unlimited
current flows from the substrate (V
CC–
terminal) to the input, which can destroy the unit. On the LT1014,
the 400-
resistors in series with the input (see schematic) protect the device even when the input is 5 V
below ground.
2.
When the input is more than 400 mV below ground (at T
A
= 25
°
C), the input stage of similar type operational
amplifiers saturates, and phase reversal occurs at the output. This can cause lockup in servo systems.
Because of unique phase-reversal protection circuitry (Q21, Q22, Q27, and Q28), the LT1014 outputs do
not reverse, even when the inputs are at –1.5 V (see Figure 24).
However, this phase-reversal protection circuitry does not function when the other operational amplifier on the
LT1014 is driven hard into negative saturation at the output. Phase-reversal protection does not work on an
amplifier:
When 4’s output is in negative saturation (the outputs of 2 and 3 have no effect)
When 3’s output is in negative saturation (the outputs of 1 and 4 have no effect)
When 2’s output is in negative saturation (the outputs of 1 and 4 have no effect)
When 1’s output is in negative saturation (the outputs of 2 and 3 have no effect)
At the output, other single-supply designs either cannot swing to within 600 mV of ground or cannot sink more
than a few microproamperes while swinging to ground. The all-npn output stage of the LT1014 maintains its low
output resistance and high gain characteristics until the output is saturated. In dual-supply operations, the output
stage is free of crossover distortion.
(a) VI(PP) = –1.5 V to 4.5 V
(b) Output Phase Reversal
Exhibited by LM358
(c) No Phase Reversal
Exhibited by LT1014
–
V
I
–
V
O
–
V
O
5
4
3
2
1
0
–1
–2
5
4
3
2
1
0
–1
5
4
3
2
1
0
–1
Figure 24. Voltage-Follower Response
With Input Exceeding the Negative Common-Mode Input Voltage Range
相關PDF資料 |
PDF描述 |
|---|---|
| LT1014AJ | QUAD PRECISION OPERATIONAL AMPLIFIERS |
| LT1014AN | CAPACITOR, CER, .47UF,16V,+80/-20% |
| LT1014DJ | QUAD PRECISION OPERATIONAL AMPLIFIERS |
| LT1014DMN | QUAD PRECISION OPERATIONAL AMPLIFIERS |
| LT1014DW | CAP 10UF 6.3V 0805 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LT1014AJ | 制造商:TI 制造商全稱:Texas Instruments 功能描述:QUAD PRECISION OPERATIONAL AMPLIFIERS |
| LT1014AMFK | 制造商:TI 制造商全稱:Texas Instruments 功能描述:QUAD PRECISION OPERATIONAL AMPLIFIERS |
| LT1014AMFKB | 制造商:Texas Instruments 功能描述: |
| LT1014AMJ | 制造商:Linear Technology 功能描述:OP Amp Quad GP ±22V/44V 14-Pin CDIP 制造商:Texas Instruments 功能描述:OP Amp Quad GP ±22V/44V 14-Pin CDIP Tube 制造商:Texas Instruments 功能描述:OP AMP QUAD GP 22V/44V 14CDIP - Rail/Tube |
| LT1014AMJ/883 | 制造商:Linear Technology 功能描述:OP Amp Quad GP ±22V/44V 14-Pin CDIP |
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