BGA430 datasheet(5/24 Pages) INFINEON

5 / 24 page

AN 074 Rev E

5 / 24

19-November-2002

Applications Note No. 074

Silicon Discretes

BGB540 stage alone, a zero-ohm “jumper”

needs to be used in place of R2. The total PCB

area consumed for the entire BGA430 +

BGB540 I.F. Amplifier is approximately 0.585 x

0.180 inch / 14.9 x 4.6 mm, or approximately 70

mm2.

The total component count, including

both Silicon MMICs, is 16.

Note that PCB area

and component count may be reduced markedly

if the end user is able to satisfy his or her I.F.

amplifier requirements by using the BGA430 as

a stand-alone part. The next section describes

the BGA430 as a stand-alone I.F. amplifier.

Figure 4. Top View of I.F. Amp PC Board.

Figure 5. Bottom View of I.F. Amp PC Board

Figure 6. Close-In Shot of PCB. BGA430 on

left, BGB540 on Right.

Figure 7.

Cross-Section Diagram of I.F.

Amplifier Printed Circuit Board.

BOTTOM LAYER

0.010 inch / 0.254 mm

0.031 inch / 0.787 mm ?

PCB CROSS SECTION

TOP LAYER

INTERNAL GROUND PLANE

LAYER FOR MECHANICAL RIGIDITY OF PCB, THICKNESS HERE NOT

CRITICAL AS LONG AS TOTAL PCB THICKNESS DOES NOT EXCEED

0.045 INCH / 1.14 mm (SPECIFICATION FOR TOTAL PCB THICKNESS:

0.040 + 0.005 / - 0.005 INCH;

1.016 + 0.127 mm / - 0.127 mm )

THIS SPACING CRITICAL !

5. Using the BGA430 as a Stand-Alone I.F.

Amplifier Block

Provided that BGA430 gain magnitude, gain

curve and output power are adequate for the

user’s LNB system requirements, BGA430 may

be used as a very low-parts-count, low-cost

stand-alone LNB I.F. amplifier over the 950 –

2150 MHz range. Note that only 3 external

elements are typically required with BGA430:

1) an input DC blocking capacitor 2) an output

DC blocking capacitor 3) an RF bypass / RF

decoupling capacitor on the VCC pin (Pin 1).

Table 2 on page 8 summarizes the BGA430’s

typical performance and Figures 11 – 15 give

network analyzer screen shots of input / output

match, gain, and

(continued on page 7)

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