Axiom Microdevices has developed what it is calling the first fully integrated CMOS power amplifier (PA) with the introduction of the AX502 device. The product integrates full quad-band GSM/GPRS PA functionality on one IC using mainstream silicon CMOS process technology at 0.13 microns. This includes all the necessary functions between the transmitter output and transmit/receive switch, the power gain stages, and the small-signal control circuitry.
The AX502 amplifies low-level RF signals to the required high-power levels needed for transmission in GSM/GPRS handsets or data modules and supports quad-band (GSM 850/900/1800/1900) operation. The integrated 50-ω input and output matching circuitry, enables direct connection to the transceiver output and the transmit/receive switch input without the use of the external matching components. The power level is regulated via a fully integrated closed-loop power controller which ensures that the GSM power/time mask and switching spectrum may be met with adequate margin to allow robust mass production when subjected to a real world cell phone environment, such as highly elevated VSWR and low supply voltage.
Housed in an MSL JEDEC Level 3, lead-free, RoHS-compliant 5- by 5- by 0.9-mm MLF package, the AX502 is now sampling. For more information, visit www.axiom-micro.com.