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參數(shù)資料
| 型號： | MAX4138 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 1-Input/6-Output Video Distribution Amplifiers |
| 中文描述： | 1路輸入/4路輸出、視頻分配放大器 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 109K |
| 代理商： | MAX4138 |
M
To drive larger-capacitance loads or to reduce ringing,
add an isolation resistor between the amplifier’s output
and the load, as shown in Figure 4.
The value of R
ISO
depends on the circuit’s gain and the
capacitive load. Figure 5 shows the optional isolation
resistor (R
ISO
) vs. capacitive load (C
L
). At the higher
capacitor values, the bandwidth is dominated by the
RC network, formed by R
ISO
and C
L
.
Power-Dissipation Considerations
The MAX4137/MAX4138 can drive up to four outputs
simultaneously. Quiescent power dissipation is typically
520mW and 650mW maximum, respectively, with all
channels enabled. The maximum package power dissi-
pation is rated at 1540mW.
In a typical application, four outputs drive a standard
video signal into a 150
load. The amount of power
added to the quiescent dissipation is minimal and no
special precautions are necessary.
However, each output driving the maximum 65mA into
30
will cause a power-dissipation increase of approxi-
mately 200mW. Therefore, you should not allow more
than three outputs to deliver that load simultaneously.
Similarly, one output shorted to ground will cause a
power-dissipation increase of 650mW. Only one output
can be shorted to ground without violating the package
power rating.
In conclusion, during normal operation in a matched-
load environment, the total power dissipation is well
within the package’s dissipation rating. The maximum
power dissipation is violated only if multiple channels
are driving the maximum current into minimum loads at
the same time.
1-Input/4-Output
Video Distribution Amplifiers
10
______________________________________________________________________________________
Figure 3. Effect of C
LOAD
on Frequency Response (without
R
ISO
)
14
12
10
8
0.1M
1M
10M
100M
1G
0
6
4
2
FREQUENCY (Hz)
C
C
L
= 15pF
C
L
= 10pF
C
L
= 5pF
MAX4137
MAX4138
V
OUT
V
IN
R
ISO
C
L
R
L
Figure 4. Capacitive-Load Driving Circuit
Figure 5. Optimal Isolation Resistor (R
ISO
) vs. C
LOAD
10
40
70
100
C
LOAD
(pF)
130
160
190
220
10
11
12
13
14
15
16
R
I
)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4138EWG | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:1-Input/4-Output Video Distribution Amplifiers |
| MAX4138EWG+ | 功能描述:視頻放大器 RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| MAX4138EWG+T | 功能描述:視頻放大器 RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| MAX4138EWG-T | 功能描述:視頻放大器 RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| MAX414 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Single/Dual/Quad, 28MHz, Low-Noise, Low-Voltage, Precision Op Amps |
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