Dual-Band LNA/Mixer Accommodates TDMA And GSM/GPRS Standards November 2001 Issue Published Date: November 01, 2001
The RF2492 dual-band LNA/mixer targets the TDMA/GSM handset market and complies with GAIT (GSM/ANSI-136 Interoperability Team) specifications. With the IC, handset designers can accommodate these two standards, even with differences in channel bandwidths and gain requirements. The RF2492 is a complete receiver front-end with dual IF outputs that interface to two independent IF SAW filters. The chip supports applications such as TDMA and GSM/GPRS where 30 kHz and 200 kHz IF bandwidths are employed. Power management control pins allow either IF output to be accessed from high or low band LNAs. In addition, the device provides 24 dB cascaded gain and a 2.9 dB cascaded noise figure. The RF2492 operates over the cellular and PCS frequency bands and uses only 30 mA of current. Other features include stepped LNA/mixer gain control, adjustable LNA bias current, and IIP3 and differential LO buffer outputs. The RF2492 is manufactured using an advanced SiGe HBT process and is offered in a small, industry-standard leadless 5 mm x 5 mm 32-pin plastic package. Pricing is $2.17 each/100,000. RF MICRO DEVICES, Greensboro, NC. (336) 664-1233.
