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参数资料
| 型号： | LT1739CFE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/20页 |
| 文件大小： | 0K |
| 描述： | IC AMP XDSL LINE DRV DUAL20TSSOP |
| 标准包装： | 2,500 |
| 类型： | 线路驱动器，发射器 |
| 驱动器/接收器数： | 2/0 |
| 规程： | DSL |
| 电源电压： | 5 V ~ 12 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 20-TSSOP-EP |
| 包装： | 带卷 (TR) |
15
LT1739
1739fas, sn1739
Using DC blocking capacitors, as shown in Figure 16, to
AC couple the signal to the transformer eliminates the
possibility for DC current to flow under any conditions.
These capacitors should be sized large enough to not
impair the frequency response characteristics required for
the data transmission.
Another important fault related concern has to do with
very fast high voltage transients appearing on the tele-
phone line (lightning strikes for example). TransZorbs
,
varistors and other transient protection devices are often
used to absorb the transient energy, but in doing so also
1739 F16
+
–
1/2
LT1739
–IN
–
+
1/2
LT1739
+IN
12V
SHDN
–12V
12.7
0.1
F
12V –12V
24.9k
1:2
LINE
LOAD
110
1000pF
110
1k
12.7
SHDNREF
0.1
F
12V –12V
BAV99
Figure 16. Protecting the Driver Against Load Faults and Line Transients
create fast voltage transitions themselves that can be
coupled through the transformer to the outputs of the line
driver. Several hundred volt transient signals can appear
at the primary windings of the transformer with current
into the driver outputs limited only by the back termination
resistors. While the LT1739 has clamps to the supply rails
at the output pins, they may not be large enough to handle
the significant transient energy. External clamping diodes,
such as BAV99s, at each end of the transformer primary
help to shunt this destructive transient energy away from
the amplifier outputs.
TransZorb is a registered trademark of General Instruments, GSI
APPLICATIO S I FOR ATIO
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1739CUE | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 500mA, 200MHz xDSL Line Driver Amplifier |
| LT1739CUE#PBF | 功能描述:IC OP AMP XDSL DVR 500MA 12DFN RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:* 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| LT1739CUE#TR | 功能描述:IC AMP XDSL LINE DVR DUAL 12-DFN RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| LT1739CUE#TRPBF | 功能描述:IC AMP XDSL LINE DVR DUAL 12-DFN RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| LT1739IFE | 功能描述:IC AMP XDSL LINE DRV DUAL20TSSOP RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
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