參數(shù)資料
型號(hào)： THS6012CGQE
廠商： Texas Instruments, Inc.
英文描述： 500-mA DUAL DIFFERENTIAL LINE DRIVER
中文描述： 500毫安雙差分線路驅(qū)動(dòng)器
文件頁(yè)數(shù)： 24/35頁(yè)
文件大?。?/td> 604K
代理商： THS6012CGQE
THS6012
500-mA DUAL DIFFERENTIAL LINE DRIVER
SLOS226C– SEPTEMBER 1998 – REVISED FEBRUARY 2000
24
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
noise calculations and noise figure (continued)
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.
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
eRs
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
en
2
IN
RS
2
4 kTRS
Figure 42 shows the noise figure graph for the THS6012.
NOISE FIGURE
vs
SOURCE RESISTANCE
18
14
0
20
16
12
N
Rs – Source Resistance –
Figure 42. Noise Figure vs Source Resistance
10
100
1k
10k
TA = 25
°
C
8
4
10
6
2
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
THS6012DWP 制造商:TI 制造商全稱:Texas Instruments 功能描述:500-mA DUAL DIFFERENTIAL LINE DRIVER
THS6012EVM 功能描述:其他開(kāi)發(fā)工具 THS6012 Hi-Spd Amp Eval Mods RoHS:否 制造商:Parallax 產(chǎn)品:ELEV-8 Hex Upgrade Kits 類型:Robotics 工具用于評(píng)估:ELEV-8 Quadcopter 工作電源電壓:
THS6012GQE 制造商:TI 制造商全稱:Texas Instruments 功能描述:500-mA DUAL DIFFERENTIAL LINE DRIVER
THS6012IDWP 功能描述:緩沖器和線路驅(qū)動(dòng)器 500-mA Dual Diff Line Driver RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
THS6012IDWPG4 功能描述:緩沖器和線路驅(qū)動(dòng)器 500mA Dual Diff Line Driver RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
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