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參數(shù)資料
| 型號(hào)： | MAX4190ESA+T |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 9/23頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP CURRENT SENSE 8-SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 應(yīng)用： | 電流反饋 |
| 電路數(shù)： | 1 |
| -3db帶寬： | 185MHz |
| 轉(zhuǎn)換速率： | 340 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： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 帶卷 (TR) |
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MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
______________________________________________________________________________________
17
VOUT
RG
RS
VOUT = -(RF / RG) (VIN)
VIN
RF
RO
RT
MAX4188
MAX4189
MAX4190
Figure 3a. Inverting Gain Configuration
VOUT
RG
RS
VOUT = [1+ (RF / RG)] VIN
VIN
RF
RO
RT
MAX4188
MAX4189
MAX4190
Figure 3b. Noninverting Gain Configuration
Layout and Power-Supply Bypassing
As with all wideband amplifiers, a carefully laid out PCB
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 multi-
layer 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 1F capacitor in parallel with a 0.01F to
0.1F 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
10F 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 Feedback and Gain Resistors
The optimum value of the external-feedback (RF) and
gain-setting (RG) 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 |
|---|---|
| MAX4190ESD | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Current-Feedback Operational Amplifier |
| MAX4190EUA | 功能描述:運(yùn)算放大器 - 運(yùn)放 Integrated Circuits (ICs) RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX4190EUA-T | 功能描述:運(yùn)算放大器 - 運(yùn)放 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX4193 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:CMOS Micropower Step-Up Switching Regulator |
| MAX4193C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CMOS Micropower Step-UP Switching Regulator |
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