參數(shù)資料
型號(hào)： LM6181AIN
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 音頻／視頻放大
英文描述： 100 mA, 100 MHz Current Feedback Amplifier
中文描述： VIDEO AMPLIFIER, PDIP8
封裝： PLASTIC, DIP-8
文件頁(yè)數(shù)： 17/23頁(yè)
文件大小： 1848K
代理商： LM6181AIN
Typical Applications
(Continued)
SLEW RATE CONSIDERATIONS
The slew rate characteristics of current feedback amplifiers
are different than traditional voltage feedback amplifiers. In
voltage feedback amplifiers slew rate limiting or non-linear
amplifier behavior is dominated by the finite availability of the
1st stage tail current charging the compensation capacitor.
The slew rate of current feedback amplifiers, in contrast, is
not constant. Transient current at the inverting input deter-
mines slew rate for both inverting and non-inverting gains.
The non-inverting configuration slew rate is also determined
by input stage limitations. Accordingly, variations of slew
rates occur for different circuit topologies.
DRIVING CAPACITIVE LOADS
The LM6181 can drive significantly larger capacitive loads
than many current feedback amplifiers. Although the
LM6181 can directly drive as much as 100 pF without oscil-
lating, the resulting response will be a function of the feed-
back resistor value. Figure 5 illustrates the small-signal
pulse response of the LM6181 while driving a 50 pF load.
Ringing persists for approximately 70 ns. To achieve pulse
responses with less ringing either the feedback resistor can
be increased (see typical curves Suggested R
f
and R
for
C
), or resistive isolation can be used (10
–51
typically
works well). Either technique, however, results in lowering
the system bandwidth.
Figure 6 illustrates the improvement obtained with using a
47
isolation resistor.
DS011328-15
3a: R
f
= 820
DS011328-16
3b: R
f
= 1640
FIGURE 3. Increasing Compensation
with Increasing R
f
DS011328-17
FIGURE 4. Reducing R
f
for Large
Closed Loop Gains, R
f
= 500
DS011328-18
5a
DS011328-19
5b
FIGURE 5. A
= 1, LM6181 Can Directly
Drive 50 pF of Load Capacitance with 70 ns
of Ringing Resulting in Pulse Response
www.national.com
17
相關(guān)PDF資料
PDF描述
LM6181AMN 100 mA, 100 MHz Current Feedback Amplifier
LM6181 100 mA, 100 MHz Current Feedback Amplifier
LM6181AIM 100 mA, 100 MHz Current Feedback Amplifier
LM6181AIM-8 JT 79C 79#22D SKT WALL RECP
LM6181IM-8 100 mA, 100 MHz Current Feedback Amplifier
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM6181AJM 制造商:Texas Instruments 功能描述:
LM6181AMJ/883 制造商:NSC 制造商全稱:National Semiconductor 功能描述:100 mA, 100 MHz Current Feedback Amplifier
LM6181AMN 制造商:NSC 制造商全稱:National Semiconductor 功能描述:100 mA, 100 MHz Current Feedback Amplifier
LM6181IM 功能描述:IC AMP CURR FEEDBK 100MHZ 16SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:VIP™ II 標(biāo)準(zhǔn)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(yīng)商設(shè)備封裝:14-SOIC 包裝:帶卷 (TR)
LM6181IM 制造商:Texas Instruments 功能描述:IC AMP VIDEO SMD 6181 SOIC16
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