參數(shù)資料
型號(hào)： LT1014DJ
廠商： Texas Instruments, Inc.
英文描述： QUAD PRECISION OPERATIONAL AMPLIFIERS
中文描述： 四高精度運(yùn)算放大器
文件頁數(shù)： 18/30頁
文件大?。?/td> 631K
代理商： LT1014DJ
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(guān)PDF資料
PDF描述
LT1014DMN QUAD PRECISION OPERATIONAL AMPLIFIERS
LT1014DW CAP 10UF 6.3V 0805
LT1014FK CAP\CER CHIP\X7R AND REGULAR NPO 22UF 0805 X5R 6.3V 20% MARKED
LT1014J SMD-CAP,CER,.01UF,5% 100V,X7R,.08X.05
LT1014MN CAP;CER;1UF;16V;10%;X7R;SMD;0805
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT1014DMDW 功能描述:運(yùn)算放大器 - 運(yùn)放 Quad Precision 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
LT1014DMDWG4 功能描述:運(yùn)算放大器 - 運(yùn)放 Quad Prec 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
LT1014DMDWR 制造商:TI 制造商全稱:Texas Instruments 功能描述:QUAD PRECISION OPERATIONAL AMPLIFIERS
LT1014DMDWREP 功能描述:運(yùn)算放大器 - 運(yùn)放 EP Quad Prec 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
LT1014DMEP 制造商:TI 制造商全稱:Texas Instruments 功能描述:QUAD PRECISION OPERATIONAL AMPLIFIER
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