CXA3329ER Ver la hoja de datos (PDF) - Sony Semiconductor
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CXA3329ER Datasheet PDF : 14 Pages
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CXA3329ER
Notes on Operation
1. Baseband signal I/Q input
Pins 3 to 6, where the baseband signal is input, do not have a determined voltage internally on the IC.
Therefore, a bias voltage equivalent to 1/2VCC should be applied externally.
2. IF signal output
The IF signal outputs, OUT/OUTX, are differential outputs. The output impedance should be 1kΩ including the
external resistance with differential. Also, it is necessary to connect the inductor to eliminate the parasitic
capacitance in the IC.
3. Notes on power supplies
The CXA3329ER is designed to operate by a 2.85V stabilized power supply to allow use with the battery
driven portable phones. Using the multiple voltage regulators throughout the phone is recommended to
minimize the power supply noise in the CXA3329ER power supply unit. The recommended power supply range
for the CXA3329ER is from 2.7V to 3.3V. Decouple the power supplies around the CXA3329ER using 1µF
capacitor for each VCC pin. Locate this capacitor as close to the pins as possible to minimize the series
inductance. Using an additional 1nF decoupling capacitor in parallel to the 1µF capacitor is recommended to
further reduce the high frequency noise in the power supply input to the CXA3329ER.
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