Freescale has unveiled two broadband radio frequency (RF) power amplifiers—the Airfast AFIC901N LDMOS RF integrated device and an AFT05MS003N LDMOS transistor. Targeting applications where power for radio range and battery life is key, the products are operated at 3.6 volt (V) or 7.5 V.
The efficiency of the RF power devices allows land mobile radio OEMs to take advantage of transistor performance, while the high gain provides an opportunity to reduce the number of transistors used, lowering system cost.
The devices feature broad bandwidths that cover frequency bands between 136 megahertz (MHz) and 941 MHz and provide high efficiency and gain, all housed in compact and lightweight over-molded plastic packages.
Combined with Freescale microcontrollers, the devices can be used in automatic meter readers that operate at 169 MHz, 434 MHz or 868 MHz, to cost-effectively increase the application’s communication range, and for other machine-to-machine applications and supervisory control and data acquisition (SCADA) systems.
The AFIC901N two-stage LDMOS device delivers 1 W CW of RF output power with 63% efficiency and 30 decibel (dB) gain at VHF frequencies ranging from 136 MHz and 174 MHz. Delivering 30 decibel-milliwatt (dBm) rated power with an input power of only 0 dBm, it eliminates the need for pre-amplification. The AFIC901N offers RF matching flexibility externally to the device at the input and output and at the interstage level. The single-stage AFT05MS003N provides 3 W of CW power, ranging from 136 MHz to 941 MHz with 17 dB gains and 67% efficiency in the VHF band.
The AFT05MS003N is in production now and the AFIC901N is currently sampling.