- 您现在的位置：买卖IC网 > PDF目录376309 > RHF-24(2) (Texas Instruments, Inc.) LOW-POWER DISSIPATION ADSL LINE DRIVER PDF资料下载
参数资料
| 型号： | RHF-24(2) |
| 厂商： | Texas Instruments, Inc. |
| 英文描述： | LOW-POWER DISSIPATION ADSL LINE DRIVER |
| 中文描述： | 低功耗ADSL线路驱动器 |
| 文件页数： | 18/30页 |
| 文件大小： | 1105K |
| 代理商： | RHF-24(2) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页当前第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页
www.ti.com
_
+
R
F
R
S
R
G
e
Rg
e
Rf
e
Rs
e
n
IN+
Noiseless
IN
e
ni
e
no
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
eno
eniAV
e
ni
1
R
F
R
G
(Noninverting Case)
DRIVING A CAPACITIVE LOAD
Driving capacitive loads with high performance amplifiers is not a problem as long as certain precautions are
taken. The first is to realize that the THS6182 has been internally compensated to maximize its bandwidth and
slew rate performance. When the amplifier is compensated in this manner, capacitive loading directly on the
output will decrease the device's phase margin leading to high frequency ringing or oscillations. Therefore, for
capacitive loads of greater than 10 pF, it is recommended that a resistor be placed in series with the output of
the amplifier, as shown in Figure 72. A minimum value of 2
should work well for most applications. For
example, in 75-
transmission systems, setting the series resistor value to 75
both isolates any capacitance
loading and provides the proper line impedance matching at the source end.
THS6182
SLLS544G–SEPTEMBER 2002–REVISED NOVEMBER 2004
APPLICATION INFORMATION (continued)
Figure 71. Noise Model
The total equivalent input noise density (e
ni
) is calculated by using the following equation:
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
).
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.
18
相关PDF资料 |
PDF描述 |
|---|---|
| RI-60 | Ultra-miniature dry-reed switch hermetically sealed in a gas-filled glass envelope |
| RI60 | Ultra-miniature dry-reed switch germetically sealed in a gas-dilled glass envelope |
| RI-ANT-S01C-00 | SERIES 2000 ANTENNAS |
| RI-I01-110A | Tag-it HF Transponder Inlay Square |
| RI-I11-110A | Tag-it HF Transponder Inlay Square |
相关代理商/技术参数 |
参数描述 |
|---|---|
| RHF310 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Rad-hard 400 ??A high-speed operational amplifier |
| RHF310K-01V | 制造商:STMicroelectronics 功能描述: |
| RHF310K1 | 制造商:STMicroelectronics 功能描述:RAD-HARD 400 µA HIGH-SPEED OPERATIONAL AMPLIFIER (EM) - Bulk |
| RHF330 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Rad-hard 1 GHz low noise operational amplifier |
| RHF330K-01V | 制造商:STMicroelectronics 功能描述:SPACE OPERATIONAL AMP NOT DUAL MARKED NO DESC QUAL - Bulk |
发布紧急采购，3分钟左右您将得到回复。