參數(shù)資料
型號: MAX4024ESD+T
廠商: Maxim Integrated Products
文件頁數(shù): 7/23頁
文件大小: 0K
描述: IC AMP VIDEO MUX 2:1 14-SOIC
產(chǎn)品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 2,500
應用: 2:1 多路復用器-放大器
電路數(shù): 3
-3db帶寬: 200MHz
轉(zhuǎn)換速率: 360 V/µs
電流 - 電源: 25mA
電壓 - 電源,單路/雙路(±): 4.5 V ~ 11 V,±2.25 V ~ 5.5 V
安裝類型: 表面貼裝
封裝/外殼: 14-SOIC(0.154",3.90mm 寬)
供應商設備封裝: 14-SOIC
包裝: 帶卷 (TR)
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 RISO 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.
MAX4023–MAX4026
Triple and Quad, 2:1 Video Multiplexer-
Amplifiers with Fixed and Settable Gain
______________________________________________________________________________________
15
Figure 1. MAX4023/MAX4025 Noninverting Gain Configuration
RT
75
RT
75
RT
75
RF
RG
OUT_
FB_
IN_A
IN_B
A/B
EN
75
CABLE
75
CABLE
RT
75
75
CABLE
MAX4023
MAX4025
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