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參數(shù)資料
| 型號(hào)： | LMH6739MQX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | Very Wideband, Low Distortion Triple Video Buffer |
| 中文描述： | 1 CHANNEL, VIDEO AMPLIFIER, PDSO16 |
| 封裝： | SSOP-16 |
| 文件頁(yè)數(shù)： | 7/10頁(yè) |
| 文件大?。?/td> | 796K |
| 代理商： | LMH6739MQX |
Application Section
GENERAL INFORMATION
The LMH6739 is a high speed current feedback Program-
mable Gain Buffer (PGB), optimized for very high speed and
low distortion. With its internal feedback and gain-setting
resistors the LMH6739 offers excellent AC performance
while simplifying board layout and minimizing the affects of
layout related parasitic components. The LMH6739 has no
internal ground reference so single or split supply configura-
tions are both equally useful.
SETTING THE CLOSED LOOP GAIN
The LMH6739 is a current feedback amplifier with on-chip
R
= R
G
= 450
. As such it can be configured with an A
=
+2, A
= +1, or an A
= 1 by connecting pins 3 and 4 as
described in the chart below.
GAIN A
V
INPUT CONNECTIONS
Non-Inverting (Pin 3) Inverting (Pin 4)
Ground
Input Signal
Input Signal
1 V/V
+1 V/V
+2 V/V
Input Signal
NC (Open)
Ground
The gain of the LMH6739 is accurate to
±
1% and stable over
temperature. The internal gain setting resistors, R
and R
,
match very well. However, over process and temperature
their absolute value will change. Using external resistors in
series with R
to change the gain will result in poor gain
accuracy over temperature and from part to part.
20104105
FIGURE 1. Recommended Non-Inverting Gain Circuit,
Gain = +2
20104108
FIGURE 2. Recommended Non-Inverting Gain Circuit,
Gain +1
20104103
FIGURE 3. Recommended Inverting Gain Circuit,
Gain = –1
20104130
FIGURE 4. Correction for Unity Gain Peaking
20104129
FIGURE 5. Frequency Response for Circuit in
Figure 4
L
www.national.com
7
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMH6739MQX/NOPB | 功能描述:緩沖器和線路驅(qū)動(dòng)器 RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| LMH681MA/NOPB | 制造商:Texas Instruments 功能描述: |
| LMH6881EVAL/NOPB | 制造商:Texas Instruments 功能描述:LMH6881EVAL/NOPB EVALUATION MODULE |
| LMH6881SQ/NOPB | 功能描述:差分放大器 2.4GHz Programmable Diff Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 Channel 帶寬:2.4 GHz 可用增益調(diào)整:6 dB to 26 dB 輸入補(bǔ)償電壓: 共模抑制比（最小值）:- 40 dB 工作電源電壓:4.75 V to 5.25 V 電源電流:100 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WQFN-24 封裝:Reel |
| LMH6881SQE/NOPB | 功能描述:差分放大器 2.4GHz Programmable Diff Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 Channel 帶寬:2.4 GHz 可用增益調(diào)整:6 dB to 26 dB 輸入補(bǔ)償電壓: 共模抑制比（最小值）:- 40 dB 工作電源電壓:4.75 V to 5.25 V 電源電流:100 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WQFN-24 封裝:Reel |
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