SA1620BE Datasheet | Philips Semiconductors

DESCRIPTION The SA1620 is a bined receive (Rx) and transmit (Tx) front-end for GSM cellular telephones. The receive path contains two low noise amplifiers (LNA1 and LNA2) with four switchable attenuation steps. A Gilbert Cell mixer in the receive path down-converts the RF signal to a first IF of 70 to 500 MHz. A second Gilbert Cell in the transmit path transposes a GMSK or phase modulated IF to RF by image reject mixing and has a fixed IF of 400 MHz. A buffered LO signal is fed to Rx and Tx mixers. Rx or Tx path or the entire circuit may be powered-down. - Feedthrough attenuation LNA1 to Rx mixer ≥ 35d B - Tx power adjustable from -3 to +12d Bm by external resistor - Direct supply: 2.7V to 5.5V - Battery supply voltage VBATT = 3.3V to 7.5V or direct supply - Two DC regulators programmable for 3.0V, 3.4V, 3.7V or 5.1V - Low current consumption: 28m A for Rx or 59m A for Tx - Fully patible with SA1638 GSM IF Digital I/Q circuit APPLICATIONS FEATURES - Excellent noise figure: <2d B for the LNAs at 950MHz - LNAs matched to 50Ω with external matching ponents - LNAs with gain control, 59d B dynamic range in four discrete steps - LNA gain stability ±0.5d B within -40 to 85°C PIN CONFIGURATION - 900MHz front end for GSM hand-held units - Portable radio, TDMA systems LQFP Package PONBUF 36 35 34 33 32 31 48- PIN LQFP 30 29 28 27 26 25 13 14 15 16 17 18 19 20 21 22 23 24 GNDBM Rx IF Tx IF GND1 Rx IFX GND2 Tx IFX GND3 Vcc Tx1 PONRx GNDTx1 Vcc Tx2 GNDL1A GNDTx3 GNDTx4 GNDL1 Vcc L1 OUT1 RETx PDTx Tx0X Tx O IN1 48 47 46 45 44 43 42 VCCL2 IN2 GNDL2 GNDL2A OUT2 B A INM INMX P2 P1 VCCBM 1 2 3 4 5 6 7 8 9 10 11 12 41 40 39 38 37 VBATT PON GNDREG1 VREG1 VREGF2 VREG2 GNDREG2 CON1 LO INX LO IN CON2 GNDTx2 SR00127 Figure 1. Pin Configuration ORDERING INFORMATION DESCRIPTION 48-Pin Thin Quad Flat Pack (TQFP) TEMPERATURE RANGE -40 to +85°C ORDER CODE SA1620BE DWG # SOT313-2 REMENDED OPERATING CONDITIONS SYMBOL VCCXX VBATT TA Supply voltages Battery voltage Operating ambient temperature range...