- 您现在的位置：买卖IC网 > PDF目录385529 > MAX442 (Maxim Integrated Products, Inc.) 140MHz, 2-Channel Video Multiplexer/Amplifier(2通道，140MHz，视频多路开关/放大器) PDF资料下载
参数资料
| 型号： | MAX442 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | 140MHz, 2-Channel Video Multiplexer/Amplifier(2通道，140MHz，视频多路开关/放大器) |
| 中文描述： | 140MHz、2通道、视频多路复用放大器 |
| 文件页数： | 6/8页 |
| 文件大小： | 116K |
| 代理商： | MAX442 |
M
The Typical Operating Circuit shows the MAX442 dri-
ving a back-terminated 75
video cable. The back-ter-
mination resistor (at the MAX442 output) is included to
match the impedance of the cable’s driven end to the
characteristic impedance of the cable itself. This, plus
the load-termination resistor, eliminates signal reflec-
tions from the cable’s ends. The back-termination resis-
tor forms a voltage divider with the load impedance,
which attenuates the signal at the cable output by one-
half. The amplifier is operated with a 2V/V closed-loop
gain to provide unity gain at the cable’s video output.
Capac itive-Load Driving
Driving large capacitive loads increases the likelihood
of oscillation in most amplifier circuits. This is especial-
ly true for circuits with high loop gains, like voltage fol-
lowers. The amplifier’s output impedance and the
capacitive load form an RC filter that adds a pole to the
loop response. If the pole frequency is low enough, as
when driving a large capacitive load, the circuit phase
margin is degraded and oscillation may occur.
With capacitive loads greater than approximately 50pF
and the MAX442 configured as a unity-gain buffer, use
an isolation resistor in series with the load, as shown in
Figure 2. The resistor removes the pole from the loop
response caused by the load capacitance.
Channel S witc hing T ime/T ransient
When the MAX442 multiplexer is switched from one
channel to another, a small glitch will appear at the out-
put. Figure 3 shows the results of putting a 0V to 5V
pulse 100ns wide into A0.
140MHz, 2-Channel
Video Multiplexer/Amplifier
6
_______________________________________________________________________________________
MAX442
22
C
LOAD
> 50pF
OUT
IN
Figure 2. Capacitive-Load-Driving Circuit
A0 INPUT
5V/div
AMP
OUTPUT
200mV/div
GND
GND
Figure 3. Output Switching Transient when Switching Between
Two Grounded Inputs with R
L
= 100
INPUT
1V/V
CABLE
OUTPUT
1V/V
GND
GND
Figure 5. Pulse Response with R
L
= 100
(50
back-terminated
cable), A
VCL
= +2V/V
INPUT
1V/div
CABLE
OUTPUT
500mV/div
GND
GND
Figure 4. Pulse Response with R
L
= 100
(50
back-terminated
cable), A
VCL
= +1V/V
相关PDF资料 |
PDF描述 |
|---|---|
| MAX445 | Low-Cost, High-Resolution, 200MHz Video CRT Driver(低功耗,高分辨率,Z轴视频显示器) |
| MAX4473ESA | Low-Cost, Low-Voltage, PA Power Control Amplifier for GSM Applications in 8-Pin レMAX |
| MAX4473 | Low-Cost, Low-Voltage, PA Power Control Amplifier for GSM Applications in 8-Pin レMAX |
| MAX4473EUA | Low-Cost, Low-Voltage, PA Power Control Amplifier for GSM Applications in 8-Pin レMAX |
| MAX4475AUT-T | SOT23, Low-Noise, Low-Distortion, Wide-Band, Rail-to-Rail Op Amps |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4420C/D | 功能描述:功率驱动器IC High-Speed 6A MOSFET Driver RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX4420C/D+ | 功能描述:功率驱动器IC RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX4420CPA | 功能描述:功率驱动器IC 6A MOSFET Driver (Noninverting) RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX4420CPA+ | 功能描述:功率驱动器IC 6A MOSFET Driver (Noninverting) RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX4420CSA | 功能描述:功率驱动器IC 6A MOSFET Driver (Noninverting) RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。