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| 型号： | LMH6702WG-QMLV |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1 CHANNEL, VIDEO AMPLIFIER, CDSO10 |
| 封装： | CERAMIC, SOIC-10 |
| 文件页数： | 2/13页 |
| 文件大小： | 780K |
| 代理商： | LMH6702WG-QMLV |
Application Section (Continued)
DC ACCURACY AND NOISE
Example below shows the output offset computation equa-
tion for the non-inverting configuration using the typical bias
current and offset specifications for A
V =+2:
Output Offset : V
O =(±IBN RIN ± VIO)(1+RF/RG) ± IBI RF
Where R
IN is the equivalent input impedance on the non-
inverting input.
Example computation for A
V = +2, RF = 237
,R
IN =25
:
V
O =(±6A 25
± 1mV) (1 + 237/237) ± 8A 237 =
±4.20mV
A good design, however, should include a worst case calcu-
lation using Min/Max numbers in the data sheet tables, in
order to ensure "worst case" operation.
Further improvement in the output offset voltage and drift is
possible using the composite amplifiers described in Appli-
cation Note OA-7. The two input bias currents are physically
unrelated in both magnitude and polarity for the current
feedback topology. It is not possible, therefore, to cancel
their effects by matching the source impedance for the two
inputs (as is commonly done for matched input bias current
devices).
The total output noise is computed in a similar fashion to the
output offset voltage. Using the input noise voltage and the
two input noise currents, the output noise is developed
through the same gain equations for each term but com-
bined as the square root of the sum of squared contributing
elements. See Application Note OA-12 for a full discussion of
noise calculations for current feedback amplifiers.
PRINTED CIRCUIT LAYOUT
Generally, a good high frequency layout will keep power
supply and ground traces away from the inverting input and
output pins. Parasitic capacitances on these nodes to
ground will cause frequency response peaking and possible
circuit oscillations (see Application Note OA-15 for more
information). National Semiconductor suggests the following
evaluation boards as a guide for high frequency layout and
as an aid in device testing and characterization:
Device
Package
Evaluation Board
Part Number
LMH6702QMLMF SOT23-5
CLC730216
LMH6702QMLMA Plastic SOIC
CLC730227
These free evaluation boards are shipped when a device
sample request is placed with National Semiconductor.
LMH6702QML
www.national.com
10
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| 5962F0254601VZA | 1 CHANNEL, VIDEO AMPLIFIER, CDSO10 |
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| 5962-0254601VZA | 1 CHANNEL, VIDEO AMPLIFIER, CDSO10 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LMH6703 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:1.2 GHz, Low Distortion Op Amp with Shutdown |
| LMH6703MA | 功能描述:运算放大器 - 运放 RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| LMH6703MA/NOPB | 功能描述:运算放大器 - 运放 1.2Ghz Op-Amp RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| LMH6703MAX | 功能描述:运算放大器 - 运放 RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| LMH6703MAX/NOPB | 功能描述:运算放大器 - 运放 RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
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