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參數(shù)資料
| 型號： | LMC662EM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運算放大器 |
| 英文描述： | CMOS Dual Operational Amplifier |
| 中文描述： | DUAL OP-AMP, 6500 uV OFFSET-MAX, 1.4 MHz BAND WIDTH, PDSO8 |
| 封裝： | SO-8 |
| 文件頁數(shù)： | 5/13頁 |
| 文件大小： | 430K |
| 代理商： | LMC662EM |
Typical Performance Characteristics
V
S
=
±
7.5V, T
A
= 25C unless otherwise specified (Continued)
Application Hints
AMPLIFIER TOPOLOGY
The topology chosen for the LMC662, shown in Figure 1 is
unconventional (compared to general-purpose op amps) in
that the traditional unity-gain buffer output stage is not used;
instead, the output is taken directly from the output of the in-
tegrator, to allow rail-to-rail output swing. Since the buffer
traditionally delivers the power to the load, while maintaining
high op amp gain and stability, and must withstand shorts to
either rail, these tasks now fall to the integrator.
As a result of these demands, the integrator is a compound
affair with an embedded gain stage that is doubly fed forward
(via C
and C
) by a dedicated unity-gain compensation
driver. In addition, the output portion of the integrator is a
push-pull configuration for delivering heavy loads. While
sinking current the whole amplifier path consists of three
gain stages with one stage fed forward, whereas while
sourcing the path contains four gain stages with two fed
forward.
The large signal voltage gain while sourcing is comparable
to traditional bipolar op amps, even with a 600
load. The
gain while sinking is higher than most CMOS op amps, due
to the additional gain stage; however, under heavy load
(600
) the gain will be reduced as indicated in the Electrical
Characteristics.
CMRR vs Frequency
DS009763-30
Open-Loop Frequency
Response
DS009763-31
Frequency Response vs
Capacitive Load
DS009763-32
Non-Inverting Large Signal
Pulse Response
DS009763-33
Stability vs
Capacitive Load
DS009763-34
Avoid resistive loads of less than 500
,
Note:
Stability vs
Capacitive Load
DS009763-35
Avoid resistive loads of less than 500
,
Note:
DS009763-4
FIGURE 1. LMC662 Circuit Topology (Each Amplifier)
www.national.com
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMC662EN | CMOS Dual Operational Amplifier |
| LMC662 | CMOS Dual Operational Amplifier |
| LMC6681 | Low Voltage, Rail-To-Rail Input and Output CMOS |
| LMC6681AIM | Low Voltage, Rail-To-Rail Input and Output CMOS |
| LMC6681AIMX | Low Voltage, Rail-To-Rail Input and Output CMOS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMC662EN | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
| LMC6681 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low Voltage, Rail-To-Rail Input and Output CMOS |
| LMC6681AIM | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
| LMC6681AIMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low Voltage, Rail-To-Rail Input and Output CMOS |
| LMC6681AIN | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low Voltage, Rail-To-Rail Input and Output CMOS |
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