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參數資料
| 型號： | LMH6626MMX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | Single/Dual Ultra Low Noise Wideband Operational Amplifier |
| 中文描述： | DUAL OP-AMP, 750 uV OFFSET-MAX, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數： | 16/20頁 |
| 文件大小： | 985K |
| 代理商： | LMH6626MMX |
Application Section
(Continued)
SINGLE SUPPLY OPERATION
The LMH6624/LMH6626 can be operated with single power
supply as shown in
Figure 8
. Both the input and output are
capacitively coupled to set the DC operating point.
LOW NOISE TRANSIMPEDANCE AMPLIFIER
Figure 9
implements a low-noise transimpedance amplifier
commonly used with photo-diodes. The transimpedance
gain is set by R
f
. Equation 4 provides the total input current
noise density (i
ni
) equation for the basic transimpedance
configuration and is plotted against feedback resistance (R
f
)
showing all contributing noise sources in
Figure 10
. This plot
indicates the expected total equivalent input current noise
density (i
) for a given feedback resistance (R
f
). The total
equivalent output voltage noise density (e
no
) is i
ni
*
R
f
.
(5)
LOW NOISE INTEGRATOR
The LMH6624/LMH6626 implement a deBoo integrator
shown in
Figure 11
. Positive feedback maintains integration
linearity. The LMH6624/LMH6626’s low input offset voltage
and matched inputs allow bias current cancellation and pro-
vide for very precise integration. Keeping R
G
and R
S
low
helps maintain dynamic stability.
20058925
FIGURE 7. External Lag Compensation
20058926
FIGURE 8. Single Supply Operation
20058927
FIGURE 9. Transimpedance Amplifier Configuration
20058928
FIGURE 10. Current Noise Density vs. Feedback
Resistance
L
www.national.com
16
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LMH6626MMX/NOPB | 功能描述:運算放大器 - 運放 RoHS:否 制造商:STMicroelectronics 通道數量: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 |
| LMH6628 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual Wideband, Low Noise, Voltage Feedback Op Amp |
| LMH6628EP | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Enhanced Plastic Dual Wideband, Low Noise, Voltage Feedback Op Amp |
| LMH6628JFQML | 制造商:Texas Instruments 功能描述:OP Amp Dual Volt Fdbk ±6V/12V 8-Pin CDIP Rail |
| LMH6628JFQMLV | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:DUAL WIDEBAND, LOW-NOISE, VOLTAGE FEEDBACK OP AMP, GUARANTEED TO 300k rd (si) TESTED TO MIL-STD-883, METHOD 1019 |
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