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SA1620 Datasheet(PDF) 2 Page - NXP Semiconductors |
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SA1620 Datasheet(HTML) 2 Page - NXP Semiconductors |
2 / 26 page Philips Semiconductors Product specification SA1620 Low voltage GSM front-end transceiver 2 1997 May 22 853-1784 18066 DESCRIPTION The SA1620 is a combined 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. FEATURES • Excellent noise figure: <2dB for the LNAs at 950MHz • LNAs matched to 50Ω with external matching components • LNAs with gain control, 59dB dynamic range in four discrete steps • LNA gain stability ±0.5dB within -40 to 85°C • Feedthrough attenuation LNA1 to Rx mixer ≥ 35dB • Tx power adjustable from -3 to +12dBm by external resistor • Direct supply: 2.7V to 5.5V • Battery supply voltage V BATT = 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: 28mA for Rx or 59mA for Tx • Fully compatible with SA1638 GSM IF Digital I/Q circuit APPLICATIONS • 900MHz front end for GSM hand-held units • Portable radio, TDMA systems PIN CONFIGURATION LQFP Package VBATT PON GNDREG1 VREG1 VREGF2 VREG2 GNDREG2 CON1 LO INX LO IN VCCL2 IN2 GNDL2 GNDL2A OUT2 B A INM INMX COMP2 48–PIN LQFP 45 46 47 48 1 2 3 4 5 6 7 13 14 15 16 17 18 19 25 26 27 28 29 30 42 43 44 31 32 33 34 35 36 20 21 22 23 24 8 9 10 11 12 39 40 41 37 38 COMP1 VCCBM CON2 GNDTx2 SR00127 Figure 1. Pin Configuration ORDERING INFORMATION DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG # 48-Pin Thin Quad Flat Pack (TQFP) -40 to +85 °C SA1620BE SOT313-2 RECOMMENDED OPERATING CONDITIONS SYMBOL PARAMETER RATING UNITS VCCXX Supply voltages 2.7 to 5.5 V VBATT Battery voltage 3.3 to 7.5 V TA Operating ambient temperature range -40 to +85 °C |
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