參數(shù)資料
型號(hào)： MAX4189
廠商： Maxim Integrated Products, Inc.
英文描述： Single/Triple, Low-Glitch, 250MHz, Current- Feedback Amplifiers with High-Speed Disable
中文描述： 單/三路、低毛刺、250MHz、電流反饋放大器，帶有高速禁止功能
文件頁(yè)數(shù)： 17/20頁(yè)
文件大?。?/td> 212K
代理商： MAX4189
M
S ingle/Triple, Low-Glitc h, 250MHz, Current-
Feedbac k Amplifiers with High-S peed Disable
______________________________________________________________________________________
17
V
OUT
R
G
R
S
V
OUT
= -(R
F
/ R
G
) (V
IN
)
V
IN
R
F
R
O
R
T
MAX4188
MAX4189
MAX4190
Figure 3a. Inverting Gain Configuration
V
OUT
R
G
R
S
V
OUT
= [1+ (R
F
/ R
G
)] V
IN
V
IN
R
F
R
O
R
T
MAX4188
MAX4189
MAX4190
Figure 3b. Noninverting Gain Configuration
Layout and Power-S upply Bypassing
As with all wideband amplifiers, a carefully laid out
printed circuit board and adequate power-supply
bypassing are essential to realizing the optimum AC
performance of MAX4188/MAX4189/MAX4190. The PC
board should have at least two layers. Signal and
power should be on one layer. A large low-impedance
ground plane, as free of voids as possible, should be
the other layer. With multilayer boards, locate the
ground plane on a layer that incorporates no signal or
power traces.
Do not use wire-wrap boards or breadboards and
sockets. Wire-wrap boards are too inductive.
Breadboards and sockets are too capacitive. Surface-
mount components have lower parasitic inductance
and capacitance, and are therefore preferable to
through-hole components. Keep lines as short as pos-
sible to minimize parasitic inductance, and avoid 90°
turns. Round all corners. Terminate all unused amplifier
inputs to ground with a 100
or 150
resistor.
The MAX4188/MAX4189/MAX4190 achieve a high
degree of off-isolation (65dB at 10MHz) and low
crosstalk (-55dB at 10MHz). The input and output sig-
nal traces must be kept from overlapping to achieve
high off-isolation. Coupling between the signal traces of
different channels will degrade crosstalk. The signal
traces of each channel should be kept from overlap-
ping with the signal traces of the other channels.
Adequate bypass capacitance at each supply is very
important to optimize the high-frequency performance of
these amplifiers. Inadequate bypassing will also
degrade crosstalk rejection, especially with heavier
loads. Use a 1μF capacitor in parallel with a 0.01μF to
0.1μF capacitor between each supply pin and ground to
achieve optimum performance. The bypass capacitors
should be located as close to the device as possible. A
10μF low-ESR tantalum capacitor may be required to
produce the best settling time and lowest distortion
when large transient currents must be delivered to a
load.
Choosing Feedbac k and Gain Resistors
The optimum value of the external-feedback (R
F
) and
gain-setting (R
G
) resistors used with the MAX4188/
MAX4189/MAX4190 depends on the closed-loop gain
and the application circuit’s load. Table 1 lists the opti-
mum resistor values for some specific gain configura-
tions. One-percent resistor values are preferred to
maintain consistency over a wide range of production
lots. Figures 3a and 3b show the standard inverting
and noninverting configurations. Note that the nonin-
verting circuit gain (Figure 3b) is 1 plus the magnitude
of the inverting closed-loop gain. Otherwise, the two
circuits are identical.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX4189EEE 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
MAX4189EEE+ 功能描述:視頻放大器 250MHz 1.5mA Current-Feedback 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
MAX4189EEE+T 功能描述:視頻放大器 250MHz 1.5mA Current-Feedback 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
MAX4189EEE-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
MAX4189ESD 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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