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參數(shù)資料
| 型號(hào)： | LF353M |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Dual Operational Amplifier (JFET) |
| 中文描述： | DUAL OP-AMP, 10000 uV OFFSET-MAX, 4 MHz BAND WIDTH, PDSO8 |
| 封裝： | SOP-8 |
| 文件頁(yè)數(shù)： | 8/14頁(yè) |
| 文件大?。?/td> | 597K |
| 代理商： | LF353M |
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Application Hints
(Continued)
since raising the input back within the common-mode range
again puts the input stage and thus the amplifier in a normal
operating mode.
Exceeding the positive common-mode limit on a single input
will not change the phase of the output; however, if both
inputs exceed the limit, the output of the amplifier will be
forced to a high state.
The amplifiers will operate with a common-mode input volt-
age equal to the positive supply; however, the gain band-
width and slew rate may be decreased in this condition.
When the negative common-mode voltage swings to within
3V of the negative supply, an increase in input offset voltage
may occur.
Each amplifier is individually biased by a zener reference
which allows normal circuit operation on
±
6V power sup-
plies. Supply voltages less than these may result in lower
gain bandwidth and slew rate.
The amplifiers will drive a 2 k
load resistance to
±
10V over
the full temperature range of 0C to +70C. If the amplifier is
forced to drive heavier load currents, however, an increase
in input offset voltage may occur on the negative voltage
swing and finally reach an active current limit on both posi-
tive and negative swings.
Precautions should be taken to ensure that the power supply
for the integrated circuit never becomes reversed in polarity
Detailed Schematic
or that the unit is not inadvertently installed backwards in a
socket as an unlimited current surge through the resulting
forward diode within the IC could cause fusing of the internal
conductors and result in a destroyed unit.
As with most amplifiers, care should be taken with lead
dress, component placement and supply decoupling in order
to ensure stability. For example, resistors from the output to
an input should be placed with the body close to the input to
minimize “pick-up” and maximize the frequency of the feed-
back pole by minimizing the capacitance from the input to
ground.
A feedback pole is created when the feedback around any
amplifier is resistive. The parallel resistance and capacitance
from the input of the device (usually the inverting input) toAC
ground set the frequency of the pole. In many instances the
frequency of this pole is much greater than the expected 3
dB frequency of the closed loop gain and consequently there
is negligible effect on stability margin. However, if the feed-
back pole is less than approximately 6 times the expected 3
dB frequency a lead capacitor should be placed from the
output to the input of the op amp. The value of the added
capacitor should be such that the RC time constant of this
capacitor and the resistance it parallels is greater than or
equal to the original feedback pole time constant.
00564909
L
www.national.com
8
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LF353N | FILMS RoHS Compliant: Yes |
| LF401 | Film Capacitor; Voltage Rating:63VDC; Capacitor Dielectric Material:Polypropylene; Capacitance:1.5uF; Capacitance Tolerance: 10%; Lead Pitch:5.08mm; Series:MKT370; Size:6 x 11 x 7.2; Termination:Radial Leaded RoHS Compliant: Yes |
| LF40100M | TRANSISTOR | MOSFET | N-CHANNEL | 80V V(BR)DSS | 20A I(D) | SOT-262VAR |
| LF401A | PRECISION FAST SETTLING JFET INPUT OPERATIONAL AMPLIFIER |
| LF401ACD | PRECISION FAST SETTLING JFET INPUT OPERATIONAL AMPLIFIER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LF353M/NOPB | 功能描述:運(yùn)算放大器 - 運(yùn)放 WIDE BW DUAL JFET INPUT 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 |
| LF353M_Q | 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual Op amp JFET 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 |
| LF353MX | 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual Op amp JFET 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 |
| LF353MX/NOPB | 功能描述:運(yùn)算放大器 - 運(yùn)放 WIDE BW DUAL JFET INPUT 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 |
| LF353N | 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual Operational 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 |
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