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參數(shù)資料
| 型號： | LMC7101 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Tiny Low Power Operational Amplifier with Rail-To-Rail Input and Output |
| 中文描述： | 微型低功耗運算放大器至軌輸入和輸出與鐵 |
| 文件頁數(shù)： | 15/18頁 |
| 文件大小： | 853K |
| 代理商： | LMC7101 |
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
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LMC7101_05 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Low-Power Operational Amplifier |
| LMC7101_09 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Tiny Low Power Operational Amplifier with Rail-to-Rail Input and Output |
| LMC7101AIM5 | 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(zhuǎn)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 |
| LMC7101AIM5 TR | 功能描述:IC OPAMP PRIME 500KHZ SOT23-5 RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:IttyBitty® 標準包裝:2,500 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:8-SO 包裝:帶卷 (TR) |
| LMC7101AIM5 | 制造商:Texas Instruments 功能描述:OP AMP CMOS LOW POWER SMD 7101 |
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