AD6549

GSM850/900/1800/1900 Single Chip GSM Radio AD6548/9 FEATURES Fully Integrated GSM Transceiver including Direct Conversion Receiver 4 Differential LNAs Integrated Active RX Channel Select Filters Programmable Gain Baseband Amplifiers Translation Loop Direct VCO Modulator Integrated TX VCO and tank External TX filters eliminated Integrated Loop filter components High performance multi band PLL system Fast Fractional-N Synthesizer Integrated Local Oscillator VCO Fully Integrated Loop filters Crystal Reference Oscillator & Tuning System (AD6548) Power Management Integrated LDOs allow direct battery supply connection Small footprint 32-Lead 5 X 5 mm Chipscale Package APPLICATIONS Dual, Triple and Quad Band Radios - GSM850, E-GSM 900, DCS1800 and PCS1900 - GPRS to Class 12- EDGE RX 27 RX1800B 25 RX1900B 31 RX850B 29 RX900B 28 RX1800 VCC_FE I IB VCC_BBI SDATA SCLK SEN NC 1 2 3 4 5 6 7 8 TXOP_LO 10 TXOP_HI 11 VCC_TXVCO 12 VDD 13 VBAT 14 VLDO1 15 VLDO2 16 26 RX1900 32 RX850 30 RX900 24 23 22 VCC_BBQ Q QB REF_OP REFIN REFINB VAFC VCC_REF AD6548/9 LFCSP-32 (5X5 mm) 21 20 19 18 23 17 GENERAL DESCRIPTION The AD6548/9 provides a highly integrated direct conversion radio solution that combines, on a single chip, all radio and power management functions necessary to build the most compact GSM radio solution possible. The only external components required for a complete radio design are the Rx SAWs, PA, Switchplexer and a few passives enabling an extremely small cost effective G...