BGA2866 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet Rev. 4 — 13 July 2015 4 of 18
NXP Semiconductors
BGA2866
MMIC wideband amplifier
8. Application information
Figure 1 shows a typical application circuit for the BGA2866 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 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_OUTRF_IN
GND2
V
S
V
S
GND1
RF outputRF input
C3C2
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
