4

Demo Board Layout

Demo Board Schematic

Figure 5. Demo Board Layout Diagram

Figure 6. Demo Board Schematic Diagram

Notes:

1. Recommended PCB material is 10 mils Rogers RO4350.

2. Suggested component values may vary according to layout and PCB material.

3. Input board loss at 900 MHz is 0.056 dB

4. The schematic is shown with the assumption that similar PCB is used for all MGA-16116, MGA-16216 and MGA-16316.

5. Detail of the components needed for this product is shown in Table 1.

6. R1 and R6 are for low frequency stability.

7. Bias to each LNA is adjustable using R3 and R8 (see Figure 6). Increasing R3 and R8 will reduce bias current (Idd) and vice-versa.

8. R9/R10 are stability improvement resistors that may not be needed in actual application. They are included in the demoboard to provide isolation

from power supply noise.

9. Center Paddle is grounded.

Table 1. Component list for 900 MHz matching

PART

Size

Value

Detail Part Number

C1, C12

0402

20 pF

GJM1555C1H200GB01

C2, C13, C8, C22

0402

0.1 mF

GRM155R71C104KA88D

C3, C9, C16, C19

0402

100 pF

GRM1555C1H101JD01E

C6, C20, C23, C34

0805

4.7 mF

GRM21BR60J475KA11L

C7, C21

0402

12 pF

GJM1555C1H120GB01

C25, C26

0402

NOT USED

–

L1, L2

0402

68 nH

LQW15AN68NG00

L3, L4

0402

120 nH

LQW15ANR12J00

R1, R6

0402

51 ohm

RK73B1ETTP510J

R3, R8

0402

1.5 kohm

RK73B1ELTP152J

R4, R7

0402

0 ohm

RK73B1ETTP0R0J

R9, R10

0402

10 ohm

RK73B1ETTP100J

RO4350

DK 3.48

H 10mil

G 0.45mm

W 0.58mm

MGA-16X16

Demoboard

(4-Port)

Rev 1

C26

RFIN

RFOUT

R9

C7

L4

C21

L3

C23

C16

C3

R6

C13

C12

L2

R8

C1

L1

C2

R1

R3

C20

C6

C25

R7

C22

C19

R4

C8

C9

APRIL 2011

R10

C24