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參數資料
| 型號： | LMC7101BIM5X |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運算放大器 |
| 英文描述： | Tiny Low Power Operational Amplifier with Rail-To-Rail Input and Output |
| 中文描述： | OP-AMP, 9000 uV OFFSET-MAX, 0.6 MHz BAND WIDTH, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數： | 15/18頁 |
| 文件大小： | 853K |
| 代理商： | LMC7101BIM5X |
4.0 Capacitive Load Tolerance
(Continued)
nation of the op-amp’s output impedance and the capacitive
load induces phase lag. This results in either an under-
damped pulse response or oscillation.
Capacitive load compensation can be accomplished using
resistive isolation as shown in Figure 4 This simple tech-
nique is useful for isolating the capacitive input of multiplex-
ers and A/D converters.
5.0 Compensating for Input
Capacitance when Using Large
Value Feedback Resistors
When using very large value feedback resistors, (usually
>
500 k
) the large feed back resistance can react with the
input capacitance due to transducers, photodiodes, and cir-
cuit board parasitics to reduce phase margins.
The effect of input capacitance can be compensated for by
adding a feedback capacitor. The feedback capacitor (as in
Figure 5), C
f
is first estimated by:
or
R
1
C
IN
≤
R
2
C
f
which typically provides significant overcompensation.
Printed circuit board stray capacitance may be larger or
smaller than that of a breadboard, so the actual optimum
value for C
may be different. The values of C
should be
checked on the actual circuit. (Refer to the LMC660 quad
CMOS amplifier data sheet for a more detailed discussion.)
DS011991-11
FIGURE 4. Resistive Isolation
of a 330 pF Capacitive Load
DS011991-12
FIGURE 5. Cancelling the Effect of Input Capacitance
www.national.com
15
相關PDF資料 |
PDF描述 |
|---|---|
| LMC7101AIN | IC-LOW POWER CMOS AMP |
| LMC7101BIN | IC-LOW POWER CMOS OP AMP |
| LMC7101 | Low-Power Operational Amplifier |
| LMC7101AIM5 | Low-Power Operational Amplifier |
| LMC7101BIM5 | Low-Power Operational Amplifier |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LMC7101BIM5X/NOPB | 功能描述:運算放大器 - 運放 TINY LOW POWER OP AMP W/ RRIO 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 |
| LMC7101BIM5X/S7001246 | 制造商:Texas Instruments 功能描述:NSCLMC7101BIM5X@S7001246 TINY 2.7V R/R I |
| LMC7101BIM5X/SL110518 | 制造商:Texas Instruments 功能描述:OP Amp Single GP R-R I/O 15.5V 5-Pin SOT-23 T/R |
| LMC7101BIN | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:IC-LOW POWER CMOS OP AMP |
| LMC7101BYM5 | 制造商:Micrel 功能描述:Low Power Op Amplifier 500KHz 0.5mA |
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