MAX2640EUT+

更新时间： 2024-02-07 09:59:06

品牌	Logo	应用领域
美信 - MAXIM		放大器
页数	文件大小	规格书
8页	113K
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数据手册

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MAX2640EUT+ 数据手册

4 0 0 MHz t o 2 5 0 0 MHz S iGe

Ult ra -Lo w -No is e Am p lifie rs

0/MAX2641

P in De s c rip t io n

NAME

RFIN

FUNCTION

Amplifier Input. AC-couple to this pin with a DC blocking capacitor. Use recommended input matching

network (see Typical Operating Circuit).

2, 3, 5

GND

Ground. For optimum performance, provide a low inductance connection to the ground plane.

Amplifier Output. Use the recommended series blocking or matching capacitor (see Typical Operating

Circuit).

RFOUT

Supply Voltage. Bypass to ground directly at the supply pin. The value of the bypass capacitor is deter-

mined by the lowest operating frequency. Additional bypassing may be necessary for long V lines (see

Typical Operating Circuit).

De t a ile d De s c rip t io n

Ap p lic a t io n s In fo rm a t io n

The MAX2640 and MAX2641 are ultra-low-noise ampli-

fiers that operate with RF input frequency ranges of

400MHz to 1500MHz (MAX2640) or 1400MHz to

2500MHz (MAX2641). These devices are available in

SOT23-6 packages and contain internal bias circuitry to

minimize the number of required external components.

Their small size and low external component count

make them ideal for applications where board space is

limited.

Ex t e rn a l Ma t c h in g Co m p o n e n t s

The MAX2640/MAX2641 are easy to use, generally

requiring only five external components as shown in the

Typical Operating Circuit. To reduce external compo-

ne nt c ount furthe r, re p la c e e xte rna l ind uc tors with

microstrip transmission lines. The high reverse isolation

allows the tuning of the input matching network without

affecting the output match, and vice versa. Select input

and output matching networks to obtain the desired

combination of gain, noise figure, and return loss per-

formance. The Typical Operating Circuits show the rec-

ommended input and output matching networks for

the MAX2640/MAX2641 a t 900MHz a nd 1900MHz,

re s p e c tive ly. The s e va lue s a re op timize d for b e s t

simultaneous gain, noise figure, and return loss perfor-

mance. To aid in the design of matching networks for

other frequencies, Tables 1 and 2 list typical device S-

parameters and Tables 3 and 4 list typical device noise

parameters.

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1 2 3 456 7 8

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