參數(shù)資料
型號(hào)： MAX4023
廠商： Maxim Integrated Products, Inc.
英文描述： Triple and Quad, 2:1 Video Multiplexer- Amplifiers with Fixed and Settable Gain
中文描述： 三路和四路、2:1視頻多路復(fù)用器-放大器，帶有固定和可設(shè)置增益
文件頁(yè)數(shù)： 15/22頁(yè)
文件大?。?/td> 470K
代理商： MAX4023
sitic inductance, keep PC traces short and use surface-
mount components.
If input termination resistors and output back-termina-
tion resistors are used, they should be surface-mount
types, and should be placed as close to the IC pins as
possible.
Video Line Driver
The MAX4024/MAX4026 are well suited to drive short
coaxial transmission lines when the cable is terminated
at both ends (as shown in Figure 2a) where the fixed
gain of +2 compensates for the loss in the resistors.
The MAX4023/MAX4025 have settable gain to equalize
long cables. The MAX4023/MAX4025 allow adding
functions that normally require additional op amps. For
example, a cable driver can
“
boost
”
the high frequen-
cies for long runs, making the part perform multiple
functions. Figure 2b shows the
“
cable booster
”
using
the MAX4023/MAX4025.
Driving Capacitive Loads
A correctly terminated transmission line is purely resis-
tive and presents no capacitive load to the amplifier.
Reactive loads decrease phase margin and may pro-
duce excessive ringing and oscillation (see
Typical
Operating Characteristics
).
Another concern when driving capacitive loads is the
amplifier
’
s output impedance, which appears inductive
at high frequencies. This inductance forms an L-C reso-
nant circuit with the capacitive load, which causes
peaking in the frequency response and degrades the
amplifier
’
s phase margin.
Although the MAX4023
–
MAX4026 are optimized for AC
performance and are not designed to drive highly
capacitive loads, they are capable of driving up to
33pF without oscillations. However, some peaking may
occur in the frequency domain (Figure 3). To drive larg-
er capacitive loads or to reduce ringing, add an isola-
tion resistor between the amplifier
’
s output and the load
(Figure 4). The value of R
ISO
depends on the circuit
’
s
gain and the capacitive load (Figure 5). Also note that
the isolation resistor forms a divider that decreases the
voltage delivered to the load.
M
Triple and Quad, 2:1 Video Multiplexer-
Amplifiers with Fixed and Settable Gain
______________________________________________________________________________________
15
Figure 1. MAX4023/MAX4025 Noninverting Gain Configuration
R
T
75
R
T
75
R
T
75
R
F
R
G
OUT_
FB_
IN_A
IN_B
A/B
EN
75
CABLE
75
CABLE
R
T
75
75
CABLE
MAX4023
MAX4025
相關(guān)PDF資料
PDF描述
MAX4023EEE Triple and Quad, 2:1 Video Multiplexer- Amplifiers with Fixed and Settable Gain
MAX4023ESE Triple and Quad, 2:1 Video Multiplexer- Amplifiers with Fixed and Settable Gain
MAX4024ESD Triple and Quad, 2:1 Video Multiplexer- Amplifiers with Fixed and Settable Gain
MAX4024EUD Triple and Quad, 2:1 Video Multiplexer- Amplifiers with Fixed and Settable Gain
MAX4025EUP Triple and Quad, 2:1 Video Multiplexer- Amplifiers with Fixed and Settable Gain
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX4023_09 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Triple and Quad, 2:1 Video Multiplexer- Amplifiers with Fixed and Settable Gain
MAX4023EEE 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
MAX4023EEE+ 功能描述:視頻放大器 Triple & Quad 2:1 Video MUX-Amplifier 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
MAX4023EEE+T 功能描述:視頻放大器 Triple & Quad 2:1 Video MUX-Amplifier 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
MAX4023EEE-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
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