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參數資料
| 型號： | LMC6064IN |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運算放大器 |
| 英文描述： | Precision CMOS Quad Micropower Operational Amplifier |
| 中文描述： | QUAD OP-AMP, 1300 uV OFFSET-MAX, 0.1 MHz BAND WIDTH, PDIP14 |
| 封裝： | PLASTIC, DIP-14 |
| 文件頁數： | 7/12頁 |
| 文件大小： | 329K |
| 代理商： | LMC6064IN |
Typical Performance Characteristics
(Continued)
Applications Hints
AMPLIFIER TOPOLOGY
The LMC6064 incorporates a novel op-amp design topology
that enables it to maintain rail-to-rail output swing even when
driving a large load. Instead of relying on a push-pull unity
gain output buffer stage, the output stage is taken directly
from the internal integrator, which provides both low output
impedance and large gain. Special feed-forward compensa-
tion design techniques are incorporated to maintain stability
over a wider range of operating conditions than traditional
micropower op-amps. These features make the LMC6064
both easier to design with, and provide higher speed than
products typically found in this ultra-low power class.
COMPENSATING FOR INPUT CAPACITANCE
It is quite common to use large values of feedback resis-
tance for amplifiers with ultra-low input current, like the
LMC6064.
Although the LMC6064 is highly stable over a wide range of
operating conditions, certain precautions must be met to
achieve the desired pulse response when a large feedback
resistor is used. Large feedback resistors and even small
values of input capacitance, due to transducers, photo-
diodes, and circuit board parasitics, reduce phase margins.
When high input impedances are demanded, guarding of the
LMC6064 is suggested. Guarding input lines will not only re-
duce leakage, but lowers stray input capacitance as well.
(See
Printed-Circuit-Board Layout for High Impedance
Work
).
The effect of input capacitance can be compensated for by
adding a capacitor. Place a capacitor, C
f
, around the feed-
back resistor (as in Figure 1 ) such that:
or
R
1
C
IN
≤
R
2
C
f
Since it is often difficult to know the exact value of C
, C
can
be experimentally adjusted so that the desired pulse re-
sponse is achieved. Refer to the LMC660 and the LMC662
for a more detailed discussion on compensating for input
capacitance.
Non-Inverting Large
Signal Pulse Response
DS011466-33
Crosstalk Rejection
vs Frequency
DS011466-34
Stability vs Capacitive
Load, R
L
= 20 k
DS011466-35
Stability vs Capacitive
Load R
L
= 1 M
DS011466-36
DS011466-4
FIGURE 1. Canceling the Effect of Input Capacitance
www.national.com
7
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PDF描述 |
|---|---|
| LMC6081 | CAP 0.01UF 50V 10% X7R SMD-0603 TR-7-PA NI-BAR/SN ROHS |
| LMC6081AIM | Precision CMOS Single Operational Amplifier |
| LMC6081AIN | Precision CMOS Single Operational Amplifier |
| LMC6081AMN | Precision CMOS Single Operational Amplifier |
| LMC6081IM | Precision CMOS Single Operational Amplifier |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LMC6064IN | 制造商:Texas Instruments 功能描述:OP AMP QUAD PRECISION 6064 DIP14 |
| LMC6064IN/NOPB | 功能描述:運算放大器 - 運放 RoHS:否 制造商:STMicroelectronics 通道數量: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 |
| LMC606AIMX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Precision CMOS Single Micropower Operational Amplifier(334.23 k) |
| LMC6081 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Precision CMOS Single Operational Amplifier |
| LMC6081AIM | 功能描述:運算放大器 - 運放 RoHS:否 制造商:STMicroelectronics 通道數量: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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