- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383996 > THS4021EVM (Texas Instruments, Inc.) 350-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS PDF資料下載
參數(shù)資料
| 型號(hào)： | THS4021EVM |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 350-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS |
| 中文描述： | 350 - MHz的低噪聲高速放大器 |
| 文件頁數(shù)： | 10/22頁 |
| 文件大?。?/td> | 366K |
| 代理商： | THS4021EVM |
THS4021, THS4022
350-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS
SLOS265B – SEPTEMBER 1999 – REVISED FEBRUARY 2000
10
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
noise calculations and noise figure (continued)
_
+
RF
RS
RG
eRg
eRf
eRs
en
IN+
Noiseless
IN–
eni
eno
Figure 31. Noise Model
The total equivalent input noise density (e
ni
) is calculated by using the following equation:
eni
en
2
IN
RS
2
IN–
RF
RG
2
4 kTRs
4 kT RF
RG
Where:
k = Boltzmann’s constant = 1.380658
×
10
–23
T = Temperature in degrees Kelvin (273 +
°
C)
R
F
|| R
G
= Parallel resistance of R
F
and R
G
To get the equivalent output noise of the amplifier, just multiply the equivalent input noise density (e
ni
) by the
overall amplifier gain (A
V
).
eno
eniAV
e
ni
1
R
F
R
G
(noninverting case)
As the previous equations show, to keep noise at a minimum, small value resistors should be used. As the
closed-loop gain is increased (by reducing R
G
), the input noise is reduced considerably because of the parallel
resistance term. This leads to the general conclusion that the most dominant noise sources are the source
resistor (R
S
) and the internal amplifier noise voltage (e
n
). Because noise is summed in a root-mean-squares
method, noise sources smaller than 25% of the largest noise source can be effectively ignored. This can greatly
simplify the formula and make noise calculations much easier to calculate.
For more information on noise analysis, please refer to the Noise Analysissection in Operational Amplifier
Circuits Applications Report(literature number SLVA043).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| THS4022D | 350-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS |
| THS4022DGN | 350-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS |
| THS4022EVM | 350-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS |
| THS4031D | 100-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS |
| THS4031JG | 100-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| THS4021ID | 功能描述:高速運(yùn)算放大器 350MHz RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| THS4021IDG4 | 功能描述:高速運(yùn)算放大器 Ultra-Low Noise Voltage-Feedback RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| THS4021IDGN | 功能描述:高速運(yùn)算放大器 Ultra-Low Noise Voltage-Feedback RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| THS4021IDGNG4 | 功能描述:高速運(yùn)算放大器 Ultra-Low Noise Voltage-Feedback RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| THS4021IDGNR | 功能描述:高速運(yùn)算放大器 Ultra-Low Noise Voltage-Feedback RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。