参数资料
型号: THS4082CDG4
厂商: TEXAS INSTRUMENTS INC
元件分类: 音频/视频放大
英文描述: 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
封装: GREEN, PLASTIC, SOIC-8
文件页数: 5/32页
文件大小: 841K
代理商: THS4082CDG4
THS4081, THS4082
175MHz LOW POWER HIGHSPEED AMPLIFIERS
SLOS274D DECEMBER 1999 REVISED JUNE 2001
13
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
noise calculations and noise figure (continued)
This brings up another noise measurement usually preferred in RF applications, the noise figure (NF). Noise
figure is a measure of noise degradation caused by the amplifier. The value of the source resistance must be
defined and is typically 50
in RF applications.
NF
+ 10log
e
2
ni
e
Rs
2
Because the dominant noise components are generally the source resistance and the internal amplifier noise
voltage, we can approximate noise figure as:
NF
+ 10log 1 )
e
n
2
) IN )
R
S
2
4kTR
S
Figure 40 shows the noise figure graph for the THS408x.
0
5
10
15
20
25
30
35
40
Source Resistance RS ()
f = 10 kHz
TA = 25°C
NOISE FIGURE
vs
SOURCE RESISTANCE
10
100
1k
10k
Noise
Figure
(dB)
100k
Figure 40. Noise Figure vs Source Resistance
相关PDF资料
PDF描述
THS4082IDGNG4 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
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THS4082CDGN 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
THS4211DRB 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
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相关代理商/技术参数
参数描述
THS4082CDGN 制造商:Rochester Electronics LLC 功能描述:LOW POWER, VF, DUAL OP-AMP - Bulk
THS4082CDGNR 功能描述:高速运算放大器 175-MHz Low-Power Vltg-Feedback Dual RoHS:否 制造商:Texas Instruments 通道数量:1 电压增益 dB:116 dB 输入补偿电压:0.5 mV 转换速度:55 V/us 工作电源电压:36 V 电源电流:7.5 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube
THS4082CDGNRG4 功能描述:高速运算放大器 175-MHz Low-Power Vltg-Feedback Dual RoHS:否 制造商:Texas Instruments 通道数量:1 电压增益 dB:116 dB 输入补偿电压:0.5 mV 转换速度:55 V/us 工作电源电压:36 V 电源电流:7.5 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube
THS4082CDR 功能描述:高速运算放大器 175-MHz Low-Power Vltg-Feedback Dual RoHS:否 制造商:Texas Instruments 通道数量:1 电压增益 dB:116 dB 输入补偿电压:0.5 mV 转换速度:55 V/us 工作电源电压:36 V 电源电流:7.5 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube
THS4082CDRG4 功能描述:高速运算放大器 175-MHz Low-Power Vltg-Feedback Dual RoHS:否 制造商:Texas Instruments 通道数量:1 电压增益 dB:116 dB 输入补偿电压:0.5 mV 转换速度:55 V/us 工作电源电压:36 V 电源电流:7.5 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube