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參數(shù)資料
| 型號： | LMC6082IN |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | Precision CMOS Dual Operational Amplifier |
| 中文描述： | DUAL OP-AMP, 1300 uV OFFSET-MAX, 1.3 MHz BAND WIDTH, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 322K |
| 代理商： | LMC6082IN |
Applications Hints
(Continued)
The designer should be aware that when it is inappropriate
to lay out a PC board for the sake of just a few circuits, there
is another technique which is even better than a guard ring
on a PC board: Don’t insert the amplifier’s input pin into the
board at all, but bend it up in the air and use only air as an in-
sulator. Air is an excellent insulator. In this case you may
have to forego some of the advantages of PC board con-
struction, but the advantages are sometimes well worth the
effort
of
using
point-to-point
wiring. See Figure 6
up-in-the-air
Latchup
CMOS devices tend to be susceptible to latchup due to their
internal parasitic SCR effects. The (I/O) input and output pins
look similar to the gate of the SCR. There is a minimum cur-
rent required to trigger the SCR gate lead. The LMC6062
and LMC6082 are designed to withstand 100 mA surge cur-
rent on the I/O pins. Some resistive method should be used
to isolate any capacitance from supplying excess current to
the I/O pins. In addition, like an SCR, there is a minimum
holding current for any latchup mode. Limiting current to the
supply pins will also inhibit latchup susceptibility.
Typical Single-Supply Applications
(V
+
= 5.0 V
DC
)
The extremely high input impedance, and low power con-
sumption, of the LMC6082 make it ideal for applications that
require battery-powered instrumentation amplifiers. Ex-
amples of these types of applications are hand-held pH
probes, analytic medical instruments, magnetic field detec-
tors, gas detectors, and silicon based pressure transducers.
Figure 7 shows an instrumentation amplifier that features
high differential and common mode input resistance
(
>
10
14
), 0.01% gain accuracy at A
= 1000, excellent
CMRR with 1 k
imbalance in bridge source resistance. In-
put current is less than 100 fA and offset drift is less than
2.5 μV/C. R
provides a simple means of adjusting gain
over a wide range without degrading CMRR. R
is an initial
trim used to maximize CMRR without using super precision
matched resistors. For good CMRR over temperature, low
drift resistors should be used.
DS011297-7
Inverting Amplifier
DS011297-8
Non-Inverting Amplifier
DS011297-9
Follower
FIGURE 5. Typical Connections of Guard Rings
DS011297-10
(Input pins are lifted out of PC board and soldered directly to components.
FIGURE 6. Air Wiring
www.national.com
9
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LMC6082IN/NOPB | 功能描述:運算放大器 - 運放 Prec CMOS Dual 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| LMC6084 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Precision CMOS Quad Operational Amplifier |
| LMC6084AIM | 功能描述:運算放大器 - 運放 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| LMC6084AIM | 制造商:Texas Instruments 功能描述:IC OP AMP QUAD SMD 6084 SOIC14 |
| LMC6084AIM/NOPB | 功能描述:運算放大器 - 運放 Quad Prec CMOS 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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