BGA2712,115 查看數據表（PDF） - NXP Semiconductors.

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BGA2712,115

MMIC wideband amplifier

NXP Semiconductors. 

NXP Semiconductors

MMIC wideband amplifier

Product specification

BGA2712

APPLICATION INFORMATION

Figure 2 shows a typical application circuit for the

BGA2712 MMIC. The device is internally matched to 50 ,

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 closely as possible to the MMIC.

Separate paths must be used for the ground planes of the

ground pins GND1 and GND2, and these paths must be as

short as possible. When using vias, use multiple vias per

pin in order to limit ground path inductance.

handbookV, shalfpage

C1

RF input

C2

RF in

Vs

RF out

GND1 GND2

RF output

C3

MGU435

handbook, halfpaDgCe -block

100 pF

input

DC-block

100 pF

DC-block

100 pF

output

MGU437

Fig.3 Easy cascading application circuit.

handbook, halfpage

from RF

circuit

mixer

oscillator

wideband

amplifier

to IF circuit

or demodulator

MGU438

Fig.4 Application as IF amplifier.

Fig.2 Typical application circuit.

Figure 3 shows two cascaded MMICs. This configuration

doubles overall gain while preserving broadband

characteristics. Supply decoupling and grounding

conditions for each MMIC are the same as those for the

circuit of Fig.2.

The excellent wideband characteristics of the MMIC make

it an ideal building block in IF amplifier applications such

as LBNs (see Fig.4).

As a buffer amplifier between an LNA and a mixer in a

receiver circuit, the MMIC offers an easy matching, low

noise solution (see Fig.5).

In Fig.6 the MMIC is used as a driver to the power amplifier

as part of a transmitter circuit. Good linear performance

and matched input and output offer quick design solutions

in such applications.

handbook, halfpage

antenna

LNA

mixer

wideband

amplifier

oscillator

to IF circuit

or demodulator

MGU439

Fig.5 Application as RF amplifier.

handbforookm, hmalfopdaguelation

or IF circuit

mixer

oscillator

wideband

amplifier

to power

amplifier

MGU440

Fig.6 Application as driver amplifier.

2002 Sep 10

4

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