MAX4018EEE+

更新时间： 2024-01-19 06:37:32

品牌	Logo	应用领域
美信 - MAXIM		运算放大器
页数	文件大小	规格书
16页	199K
描述
暂无描述

阅读下载

中文翻译

获取价格

数据手册
替代型号

如果您发现信息不准确，欢迎纠错

MAX4018EEE+ 数据手册

Lo w -Co s t , Hig h -S p e e d , S OT2 3 , S in g le -S u p p ly

Op Am p s w it h Ra il-t o -Ra il Ou t p u t s

ENABLE

-20

-40

10k

EN_

IN-

-60

-80

OUT

MAX40_ _

IN+

-100

-120

-140

-160

50 100 150 200 250 300 350 400 450 500

mV ABOVE V

Figure 3. Circuit to Reduce Enable Logic-Low Input Current

To implement the mux function, the outputs of multiple

amplifiers can be tied together, and only the amplifier

with the selected input will be enabled. All of the other

amplifiers will be placed in the low-power shutdown

mode, with their high output impedance presenting

very little load to the active amplifier output. For gains

of +2 or greater, the feedback network impedance of

all the amplifiers used in a mux application must be

c ons id e re d whe n c a lc ula ting the tota l loa d on the

active amplifier output

Figure 2. Enable Logic-Low Input Current vs. V

-1

-2

-3

-4

-5

-6

-7

-8

-9

-10

Ou t p u t Ca p a c it ive Lo a d in g a n d S t a b ilit y

The MAX4012/MAX4016/MAX4018/MAX4020 are opti-

mized for AC performance. They are not designed to

drive highly reactive loads, which decreases phase

margin and may produce excessive ringing and oscilla-

tion. Figure 5 shows a circuit that eliminates this prob-

lem. Figure 6 is a graph of the optimal isolation resistor

(R ) vs. capacitive load. Figure 7 shows how a capaci-

50 100 150 200 250 300 350 400 450 500

tive load causes excessive peaking of the amplifier’s

frequency response if the capacitor is not isolated from

the amplifier by a resistor. A small isolation resistor

(usually 20Ω to 30Ω) placed before the reactive load

prevents ringing and oscillation. At higher capacitive

loads, AC performance is controlled by the interaction

of the loa d c a p a c ita nc e a nd the is ola tion re s is tor.

Figure 8 shows the effect of a 27Ω isolation resistor on

closed-loop response.

mV ABOVE V

618/MAX420

Figure 4. Enable Logic-Low Input Current vs. V with 10kΩ

Series Resistor

Coaxial cable and other transmission lines are easily

driven when properly terminated at both ends with their

c ha ra c te ris tic imp e d a nc e . Driving b a c k-te rmina te d

tra ns mis s ion line s e s s e ntia lly e limina te s the line ’s

capacitance.

12 ______________________________________________________________________________________

1...9 10 111213 14 15 16

中文翻译

下载PDF

MAX4018EEE+ 替代型号

型号	品牌	替代类型	描述	数据表
MAX4018EEE-T	MAXIM	类似代替	暂无描述
MAX4018EEE	MAXIM	完全替代	Low-Cost, High-Speed, SOT23, Single-Supply Op Amps with Rail-to-Rail Outputs

与MAX4018EEE+相关器件

型号	品牌	描述	获取价格	数据表
MAX4018EEE-T	MAXIM	暂无描述	获取价格
MAX4018ESD	MAXIM	Low-Cost, High-Speed, SOT23, Single-Supply Op Amps with Rail-to-Rail Outputs	获取价格
MAX4018ESD-T	MAXIM	Video Amplifier, 1 Channel(s), 3 Func, PDSO14, 0.150 INCH, MS-012AB, SO-14	获取价格
MAX4019	MAXIM	Low-Cost, High-Speed, Single-Supply, Gain of +2 Buffers with Rail-to-Rail Outputs in SOT23	获取价格
MAX4019	ADI	低成本、高速、单电源、增益为+2的缓冲器，满摆幅输出，SOT23封装	获取价格
MAX4019EEE	MAXIM	Low-Cost, High-Speed, Single-Supply, Gain of +2 Buffers with Rail-to-Rail Outputs in SOT23	获取价格