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Preliminary
5-37
RF2483
Rev A2 010904
5
Pin
Function
Description
Interface Schematic
19
RF OUT HB RF high band output. Open collector output.
The output should be biased at VCC through an inductor that can be
used to form part of an output matching circuit.
In our proposed applications circuit some power is dissipated in R4
(180
Ω) which appears as a de-Qing resistor in parallel with the output
inductor L3. If R4 is eliminated and the RFOUT HB pin is re-matched to
50
Ω it is possible to get approximately 3dB extra power out of the
device in high band mode.
20
GND3
Ground for RF output sections.
Die
Flag
GND4
Ground for modulator, variable gain amplifier and substrate.
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