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参数资料
| 型号： | MAX4189EEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/23页 |
| 文件大小： | 0K |
| 描述： | IC AMP CURRENT SENSE 16-QSOP |
| 标准包装： | 2,500 |
| 应用： | 电流反馈 |
| 电路数： | 3 |
| -3db带宽： | 250MHz |
| 转换速率： | 175 V/µs |
| 电流 - 电源： | 1.5mA |
| 电流 - 输出 / 通道： | 55mA |
| 电压 - 电源，单路/双路(±)： | 4.5 V ~ 11 V，±2.25 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 带卷 (TR) |
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4189ESD | 功能描述:视频放大器 RoHS:否 制造商:ON Semiconductor 通道数量:4 电源类型: 工作电源电压:3.3 V, 5 V 电源电流: 最小工作温度: 最大工作温度: 封装 / 箱体:TSSOP-14 封装:Reel |
| MAX4189ESD+ | 功能描述:视频放大器 250MHz 1.5mA Current-Feedback RoHS:否 制造商:ON Semiconductor 通道数量:4 电源类型: 工作电源电压:3.3 V, 5 V 电源电流: 最小工作温度: 最大工作温度: 封装 / 箱体:TSSOP-14 封装:Reel |
| MAX4189ESD+T | 功能描述:视频放大器 250MHz 1.5mA Current-Feedback RoHS:否 制造商:ON Semiconductor 通道数量:4 电源类型: 工作电源电压:3.3 V, 5 V 电源电流: 最小工作温度: 最大工作温度: 封装 / 箱体:TSSOP-14 封装:Reel |
| MAX4189ESD-T | 功能描述:视频放大器 RoHS:否 制造商:ON Semiconductor 通道数量:4 电源类型: 工作电源电压:3.3 V, 5 V 电源电流: 最小工作温度: 最大工作温度: 封装 / 箱体:TSSOP-14 封装:Reel |
| MAX418C/D | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1.2レA Max, Single/Dual/Quad, Single-Supply Op Amps |
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