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參數(shù)資料
| 型號： | LM6142AIMX |
| 元件分類： | 運算放大器 |
| 英文描述： | Voltage-Feedback Operational Amplifier |
| 中文描述： | 電壓反饋運算放大器 |
| 文件頁數(shù)： | 11/15頁 |
| 文件大小： | 402K |
| 代理商： | LM6142AIMX |
LM6142/44 Application Ideas
(Continued)
These features allow the LM6142 to drive capacitive loads
as large as 1000 pF at unity gain and not oscillate. The
scope photos (Figure 3 and Figure 4) above show the
LM6142 driving a l000 pF load. In Figure 3 the upper trace
is with no capacitive load and the lower trace is with a 1000
pF load. Here we are operating on
±
12V supplies with a 20
Vp-p pulse. Excellent response is obtained with a C
f
of l0 pF.
In Figure 4 the supplies have been reduced to
±
2.5V, the
pulse is 4 Vp-p and C
f
is 39 pF. The best value for the com-
pensation capacitor is best established after the board layout
is finished because the value is dependent on board stray
capacity, the value of the feedback resistor, the closed loop
gain and, to some extent, the supply voltage.
Another effect that is common to all opamps is the phase
shift caused by the feedback resistor and the input capaci-
tance. This phase shift also reduces phase margin. This ef-
fect is taken care of at the same time as the effect of the ca-
pacitive load when the capacitor is placed across the
feedback resistor.
The circuit shown in Figure 5 was used for these scope
photos.
Typical Applications
FISH FINDER/ DEPTH SOUNDER.
The LM6142/44 is an excellent choice for battery operated
fish finders. The low supply current, high gain-bandwidth and
full rail to rail output swing of the LM6142 provides an ideal
combination for use in this and similar applications.
DS012057-6
FIGURE 2.
DS012057-8
FIGURE 3.
DS012057-9
FIGURE 4.
DS012057-10
FIGURE 5.
L
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11
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM6142AIMX/NOPB | 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 |
| LM6142AIN | 功能描述:IC OP AMP DUAL HS R-R I/O 8-DIP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:1,000 系列:- 放大器類型:電壓反饋 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:33 V/µs 增益帶寬積:20MHz -3db帶寬:30MHz 電流 - 輸入偏壓:2nA 電壓 - 輸入偏移:3000µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:14-SOIC 包裝:帶卷 (TR) |
| LM6142AIN/NOPB | 制造商:Texas Instruments 功能描述:IC AMP DUAL 17MHZ |
| LM6142AIN/NOPB | 制造商:Texas Instruments 功能描述:Operational Amplifier (Op-Amp) IC |
| LM6142AMJ/883 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
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