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參數(shù)資料
| 型號： | LMH6725MTX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運算放大器 |
| 英文描述： | 250mA ULTRA-LOW DROPOUT POSITIVE VOLTAGE REGULATOR |
| 中文描述： | QUAD OP-AMP, 3700 uV OFFSET-MAX, PDSO14 |
| 封裝： | TSSOP-14 |
| 文件頁數(shù)： | 11/17頁 |
| 文件大?。?/td> | 1057K |
| 代理商： | LMH6725MTX |
Typical Performance Characteristics
A
V
= 2, R
F
= 1200
, R
L
= 100
, unless otherwise
specified. (Continued)
Crosstalk (LMH6725)
20078945
Application Section
GENERAL INFORMATION
The LMH6723/LMH6724/LMH6725 is a high speed current
feedback amplifier manufactured on National Semiconduc-
tor’s VIP10 (Vertically Integrated PNP) complimentary bipo-
lar process. LMH6723/LMH6724/LMH6725 offers a unique
combination of high speed and low quiescent supply current
making it suitable for a wide range of battery powered and
portable applications that require high performance. This
amplifier can operate from 4.5V to 12V nominal supply volt-
ages and draws only 1 mA of quiescent supply current at
10V supplies (
±
5V typically). The LMH6723/LMH6724/
LMH6725 has no internal ground reference so single or split
supply configurations are both equally useful.
EVALUATION BOARDS
National Semiconductor provides the following evaluation
boards as a guide for high frequency layout and as an aid in
device testing and characterization. Many of the datasheet
plots were measured with these boards.
Device
LMH6723MA
LMH6723MF
LMH6724MA
LMH6725MA
Package
SOIC-8
SOT-23
SOIC-8
SOIC-14
Board Part #
CLC730227
CLC730216
CLC730036
CLC730231
These evaluation boards can be shipped when a device
sample request is placed with National Semiconductor.
FEEDBACK RESISTOR SELECTION
One of the key benefits of a current feedback operational
amplifier is the ability to maintain optimum frequency re-
sponse independent of gain by using appropriate values for
the feedback resistor (R
). The Electrical Characteristics and
Typical Performance plots were generated with an R
of
1200
, a gain of +2V/V and
±
5V or
±
2.5V power supplies
(unless otherwise specified). Generally, lowering R
from it’s
recommended value will peak the frequency response and
extend the bandwidth; however, increasing the value of R
F
will cause the frequency response to roll off faster. Reducing
the value of R
too far below it’s recommended value will
cause overshoot, ringing and, eventually, oscillation.
Figure 1
shows the LMH6723/LMH6724/LMH6725’s fre-
quency response as R
F
is varied (R
= 100
, A
= +2). This
plot shows that an R
of 800
results in peaking. An R
of
1200
gives near maximal bandwidth and gain flatness with
good stability. Since each application is slightly different it is
worth some experimentation to find the optimal R
for a
given circuit. In general a value of R
that produces~0.1 dB
of peaking is the best compromise between stability and
maximal bandwidth. Note that it is not possible to use a
current feedback amplifier with the output shorted directly to
the inverting input. The buffer configuration of the LMH6723/
LMH6724/LMH6725 requires a 2000
feedback resistor for
stable operation. For other gains see the charts "R
F
vs. Non
20078922
FIGURE 1. Frequency Response vs. R
F
L
www.national.com
11
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| LMH6725MTX/NOPB | 功能描述:IC OP AMP CFA 1MA QUAD 14-TSSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:PowerWise® 其它有關(guān)文件:Automotive Product Guide 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 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:3 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:1pA 電壓 - 輸入偏移:70µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:Digi-Reel® 其它名稱:MAX4475AUT#TG16DKR |
| LMH6732 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Speed Op Amp with Adjustable Bandwidth |
| LMH6732J | 制造商:Texas Instruments 功能描述: |
| LMH6732MA | 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(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| LMH6732MA/NOPB | 功能描述:運算放大器 - 運放 Sgl 900Mhz Video Amp 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(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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