參數(shù)資料
型號(hào)： LMH6734MQX/NOPB
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 音頻／視頻放大
英文描述： 3 CHANNEL, VIDEO AMPLIFIER, PDSO16
封裝： ROHS COMPLIANT, SSOP-16
文件頁(yè)數(shù)： 5/18頁(yè)
文件大小： 561K
代理商： LMH6734MQX/NOPB
2.2 k
resistors were chosen to set the input DC bias voltage
to 1/4 the supply voltage such that at high frequencies the
output voltage is gained up by +2 V/V.
30003642
FIGURE 4. Recommended Single Supply Non-Inverting
Gain Circuit, Gain = +2 V/V
30003644
FIGURE 5. Recommended Single Supply Non-Inverting
Gain Circuit, Gain = +1 V/V
30003643
FIGURE 6. Recommended Single Supply Inverting Gain
Circuit, Gain = 1 V/V
The gain of the LMH6734 is accurate to ±1% and stable over
temperature. The internal gain setting resistors, R
F and RG,
match very well. However, over process and temperature
their absolute value will change. Using external resistors in
series with R
G to change the gain will result in poor gain ac-
curacy over temperature and from part to part.
UNITY GAIN COMPENSATION
With a current feedback Selectable Gain Buffer like the
LMH6734, the feedback resistor is a compromise between
the value needed for stability at unity gain and the optimized
value used at a gain of two. The result of this compromise is
substantial peaking at unity gain. If this peaking is undesirable
a simple RC filter at the input of the buffer will smooth the
frequency response as shown in Figure 7. Figure 8 shows the
results of a simple filter placed on the non-inverting input. See
Figure 9 and Figure 10 for another method of reducing unity
gain peaking.
30003630
FIGURE 7. Correction for Unity Gain Peaking
30003629
FIGURE 8. Frequency Response for Circuit in Figure 7
30003607
FIGURE 9. Alternate Unity Gain Compensation
13
www.national.com
LMH6734
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMH6738 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Very Wideband, Low Distortion Triple Op Amp
LMH6738MQ 功能描述:運(yùn)算放大器 - 運(yùn)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(bǔ)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(fēng)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
LMH6738MQ/NOPB 功能描述:運(yùn)算放大器 - 運(yùn)放 Triple Video Op-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(bǔ)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(fēng)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
LMH6738MQX 功能描述:運(yùn)算放大器 - 運(yùn)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(bǔ)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(fēng)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
LMH6738MQX/NOPB 功能描述:運(yùn)算放大器 - 運(yùn)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(bǔ)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(fēng)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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