BGA2802

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© NXP B.V. 2011. All rights reserved.

Product data sheet

Rev. 1 — 24 February 2011

4 of 18

NXP Semiconductors

BGA2802

MMIC wideband amplifier

8.

Application information

Figure 1 shows a typical application circuit for the BGA2802 MMIC. The device is

internally matched to 50

Ω, and therefore does not need any external matching. The value

of the input and output DC blocking capacitors C2 and C3 should not be more than 100 pF

for applications above 100 MHz. However, when the device is operated below 100 MHz,

the capacitor value should be increased.

The 22 nF supply decoupling capacitor C1 should be located as close as possible to the

MMIC.

The PCB top ground plane, connected to pins 2, 4 and 5 must be as close as possible to

the MMIC, preferably also below the MMIC. When using via holes, use multiple via holes

as close as possible to the MMIC.

8.1 Application examples

Fig 1.

Typical application circuit

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RF_OUT

RF_IN

GND2

GND1

RF output

RF input

C3

C2

C1

The MMIC is very suitable as IF amplifier in e.g. LNB’s.

The excellent wideband characteristics make it an easy

building block.

As second amplifier after an LNA, the MMIC offers an

easy matching, low noise solution.

Fig 2.

Application as IF amplifier

Fig 3.

Application as RF amplifier

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from RF

circuit

oscillator

wideband

amplifier

to IF circuit

or demodulator

mixer

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antenna

oscillator

wideband

amplifier

LNA

to IF circuit

or demodulator

mixer