Philips SA1920
The SA1920 is an integrated dual-band RF front-end that operates at both cellular (AMPS, GSM and TDMA) and PCS/DCS (TDMA and GSM) frequencies, and is designed in a 13 GHz fT BiCMOS process—QUBiC1. The low-band is a combined low-noise amplifier (LNA) and mixer. The LNA has a 1.7 dB noise figure at 881 MHz with 17.5 dB of gain and an IIP3 of –5 dBm.DESCRIPTION
The wide-dynamic range mixer has a 10 dB noise figure at 881 MHz with 9.5 dB of gain and an IIP3 of +5 dBm. The high-band contains a receiver front-end, doubler and a high frequency transmit mixer intended for closed loop transmitters. One advantage of the high-band architecture is an image-rejection mixer with over 30 dB of image rejection; thus, eliminating external filter cost while saving board space. The system noise figure is 4.2 dB at 1960 MHz with a power gain of 23.5 dB and an IIP3 of –12.5 dB.FEATURES
● Low current consumption● Outstanding low- and high-band noise figure
● Excellent gain stability versus temperature and supply
● Image reject high-band mixer with over 30 dB of rejection
● Increased low-band LNA gain compression during analog
● LO input and output buffers
● Frequency doubler
● On chip logic for network selection and power down
● Very small outline package
APPLICATIONS
transmission● 800 to 1000 MHz analog and digital receivers
● 1800 to 2000 MHz d...