- 您现在的位置：买卖IC网 > PDF目录97787 > 5962R1122201VZA (NATIONAL SEMICONDUCTOR CORP) OP-AMP, 2000 uV OFFSET-MAX, 2.7 MHz BAND WIDTH, CDSO10 PDF资料下载
参数资料
| 型号： | 5962R1122201VZA |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 运算放大器 |
| 英文描述： | OP-AMP, 2000 uV OFFSET-MAX, 2.7 MHz BAND WIDTH, CDSO10 |
| 封装： | CERAMIC, SOIC-10 |
| 文件页数： | 4/18页 |
| 文件大小： | 742K |
| 代理商： | 5962R1122201VZA |
Application Hints
The LF411QML series of internally trimmed JFET input op
amps ( BI-FET II ) provide very low input offset voltage and
guaranteed input offset voltage drift. These JFETs have large
reverse breakdown voltages from gate to source and drain
eliminating the need for clamps across the inputs. Therefore,
large differential input voltages can easily be accommodated
without a large increase in input current. The maximum dif-
ferential input voltage is independent of the supply voltages.
However, neither of the input voltages should be allowed to
exceed the negative supply as this will cause large currents
to flow which can result in a destroyed unit.
Exceeding the negative common-mode limit on either input
will force the output to a high state, potentially causing a re-
versal of phase to the output. Exceeding the negative com-
mon-mode limit on both inputs will force the amplifier output
to a high state. In neither case does a latch occur 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 may be forced to
a high state.
The amplifier will operate with a common-mode input voltage
equal to the positive supply; however, the gain bandwidth and
slew rate may be decreased in this condition. When the neg-
ative common-mode voltage swings to within 3V of the neg-
ative supply, an increase in input offset voltage may occur.
The LF411QML is biased by a zener reference which allows
normal circuit operation on ±4.5V power supplies. Supply
voltages less than these may result in lower gain bandwidth
and slew rate.
The LF411QML will drive a 2 k
Ω load resistance to ±10V over
the full temperature range. 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 positive and negative
swings.
Precautions should be taken to ensure that the power supply
for the integrated circuit never becomes reversed in polarity
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 en-
sure 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) to AC
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
feedback 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.
www.national.com
12
LF411QML
相关PDF资料 |
PDF描述 |
|---|---|
| 5962R9452602VGA | DUAL COMPARATOR, 9000 uV OFFSET-MAX, 5000 ns RESPONSE TIME, MBCY8 |
| 5962R9452602VPA | DUAL COMPARATOR, 9000 uV OFFSET-MAX, 5000 ns RESPONSE TIME, CDIP8 |
| 5962R9452602VGX | DUAL COMPARATOR, 9000 uV OFFSET-MAX, 5000 ns RESPONSE TIME, MBCY8 |
| 5962R9452602VPX | DUAL COMPARATOR, 9000 uV OFFSET-MAX, 5000 ns RESPONSE TIME, CDIP8 |
| 5962R9452602VGX | DUAL COMPARATOR, 9000 uV OFFSET-MAX, 5000 ns RESPONSE TIME, MBCY8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 5962R1123901VHA | |
| 5962R1223301VXA | |
| 5962R1320501VXA | |
| 5962R1420501VXA | |
| 5962R3812801VGA | 制造商:Analog Devices 功能描述:- Bulk |
发布紧急采购，3分钟左右您将得到回复。