Rainbow-electronics MAX2327 Manual de usuario descargar pdf (Pagina 17)

MAX2320/21/22/24/26/27

Adjustable, High-Linearity,

SiGe Dual-Band LNA/Mixer ICs

______________________________________________________________________________________ 17

Layout Considerations

Keep RF signal lines as short as possible to minimize

losses and radiation. Use high-Q components for the LNA

input matching circuit to achieve the lowest possible

noise figure. At the digital mixer outputs, keep the differ-

ential signal lines together and of equal length to ensure

signal balance. For best gain and noise performance, sol-

der the slug evenly to the board ground plane.

Table 5. Typical Cascaded Performance of Cellular-Band Receiver with 3dB Interstage

Filter Loss

Table 6. Typical Cascaded Performance of PCS-Band Receiver with 3dB Interstage

Filter Loss

PARAMETER

Conversion Power Gain

Noise Figure

Third-Order Input Intercept

HIGH GAIN,

HIGH LINEARITY

25.4dB

2.1dB

-8.9dBm

HIGH GAIN,

LOW LINEARITY

24.5dB

2.3dB

-10.6dBm

LOW GAIN,

HIGH LINEARITY

8.9dB

11.8dB

-6.8dBm

22.7dB

3.3dB

-6.8dBm

-9.3dBm-7.6dBm 7.1dBmThird-Order Input Intercept

3.0dB2.6dB 12.4dBNoise Figure

PARAMETER

22.5dB

HIGH GAIN,

LOW LINEARITY

24dB 7.5dBConversion Power Gain

HIGH GAIN,

HIGH LINEARITY

LOW GAIN

Table 7. Cellular LNA S Parameters in High-Gain, High-Linearity Mode

0.109 59.1 0.669 -40.80.4961000 -90.6 3.3 74.9

0.104 58.3 0.674 -39.30.503950 -88.5 3.5 76.6

0.099 58.8 0.677 -38.30.51900 -86.1 3.7 79.4

0.096 60.1 0.683 -37.60.52850 -83.7 3.88 81.9

0.0908 60 0.689

0.089 60.6

-36.6

0.696 -35.9

0.714

S22

(mag)

-34.70.085

S12

(mag)

60.9

S22

(phase)

S12

(phase)

0.534800 -81.2 4.13

0.548750 -78.4

84.4

4.39 87.9

4.63

S21

(mag)

92.10.579

S11

(mag)

700 -74.8

S21

(phase)

FREQUENCY

(MHz)

S11

(phase)

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 27 28

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Rainbow-electronics MAX2327 Manual de usuario Pagina 17

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