參數(shù)資料
型號: MAX4138EWG
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 音頻/視頻放大
英文描述: 1-Input/4-Output Video Distribution Amplifiers
中文描述: 1 CHANNEL, VIDEO AMPLIFIER, PDSO24
封裝: 0.300 INCH, SOP-24
文件頁數(shù): 10/12頁
文件大?。?/td> 109K
代理商: MAX4138EWG
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
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
)
相關(guān)PDF資料
PDF描述
MAX4137EWG 1-Input/4-Output Video Distribution Amplifiers
MAX4137 1-Input/4-Output Video Distribution Amplifiers
MAX4138 1-Input/6-Output Video Distribution Amplifiers
MAX4163ESA SOT23, Micropower, Single-Supply, Rail-to-Rail I/O Op Amps
MAX4162 SOT23, Micropower, Single-Supply, Rail-to-Rail I/O Op Amps
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