參數(shù)資料
型號(hào)： MAX4189EEE+
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 11/23頁(yè)
文件大?。?/td> 0K
描述： IC AMP CURRENT SENSE 16-QSOP
標(biāo)準(zhǔn)包裝： 100
應(yīng)用： 電流反饋
電路數(shù)： 3
-3db帶寬： 250MHz
轉(zhuǎn)換速率： 175 V/µs
電流 - 電源： 1.5mA
電流 - 輸出 / 通道： 55mA
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： 16-SSOP（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 16-QSOP
包裝： 管件
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
______________________________________________________________________________________
19
VIDEO
IN
VIDEO
OUT
75
75 CABLE
RF
560
RG
560
75
+5V
-5V
0.1F
MAX4188
0.1F
Figure 5. Video Line Driver Application
RG
RF
RS
RL
CL
VIN
MAX4188
MAX4189
MAX4190
Figure 6a. Using an Isolation Resistor (RS) for High Capacitive
Loads
The total output-referred noise voltage is:
The MAX4188/MAX4189/MAX4190 have a very low,
2nV/√Hz noise voltage. The current noise at the positive
input (in+) is 4pA/√Hz, and the current noise at the
inverting input is 5pA/√Hz.
An example of the DC error calculations, using the
MAX4188 typical data and typical operating circuit
where RF = RG = 560k (RF || RG =280), and
RS = 37.5, gives the following:
Calculating the total output noise in a similar manner
yields:
With a 200MHz system bandwidth, this calculates to
68VRMS (approximately 408VP-P, choosing the six-
sigma value).
Video Line Driver
The MAX4188/MAX4189/MAX4190 are well suited to
drive coaxial transmission lines when the cable is termi-
nated at both ends (Figure 5). Cable frequency
response can cause variations in the signal’s flatness.
See Table 1 for optimum RF and RG values.
Driving Capacitive Loads
The MAX4188/MAX4189/MAX4190 are optimized for
AC performance. Reactive loads decrease phase mar-
gin and may produce excessive ringing and oscillation.
Unlike most high-speed amplifiers, the MAX4188/
MAX4189/MAX4190 are tolerant of capacitive loads up
to 50pF. Capacitive loads greater than 50pF may
cause ringing and oscillation. Figure 6a shows a circuit
that eliminates this problem. Placing the small (usually
15 to 33) isolation resistor, RS, before the reactive
load prevents ringing and oscillation. At higher capaci-
tive loads, the interaction of the load capacitance and
isolation resistor controls AC performance. Figures 6b
and 6c show the MAX4188 and MAX4189 frequency
response with a 100pF capacitive load. Note that in
each case, gain peaking is substantially reduced when
the 20 resistor is used to isolate the capacitive load
from the amplifier output.
e
xx
x
eHz
n OUT
()
.
./
=+
()
+
+
=
11
410
37 5
510
280
210
48
12
2
12
2
9
2
nV
V
xx
x
V
OUT
=
+
+
+
()
=
1
10
37 5
2
10
280
15
10
11
41
66
3
.
.mV
e
R
x
iR
R
e
n OUT
F
G
nS
nF
G
n
()
||
=+
()
[] + ()
[] +()
+
1
22
2
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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 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
MAX4189ESD+ 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
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