SKY74100-21

DATA SHEET SKY74100-21: Dual-Band Receiver for CDMA and PCS Femtocell Applications Applications  Dual-band femtocells Description The SKY74100-21 receiver is a highly integrated device for dualband Code Division Multiple Access (CDMA) femtocells. The SKY74100-21 supports femtocells in the cellular CDMA and Personal Communications System (PCS) modes. The device requires a minimum number of external components to complete a CDMA radio subsystem. Included within the package are the downconverters, baseband filters with an autotuning loop, UHF Voltage Controlled Oscillator (VCO), RF Phase Locked Loop (PLL), and DC Offset Correction (DCOC). The SKY74100-21 is designed to operate within a supply voltage range of 2.7 V to 3.0 V. External components needed for operation include matching networks for differential mixer inputs, CDMA/PCS Surface Acoustic Wave (SAW) filters, three bias resistors for accurate bias control over process variation, and two high tolerance load resistors for In-Phase and Quadrature (I/Q) baseband output. The SKY74100-21 output is a dual-channel, fully differential analog signal at the baseband. Both channels maintain a quadrature phase relationship with each other. Together with the SKY74092 dual-band, dual-mode LNA, the SKY74100-21 completes the receiver from the RF input to the I/Q baseband outputs. The 40-pin Land Grid Array (LGA) device package and pinout are shown in Figure 1. Figure 2 shows a functional block diagram for the SKY74100-21. Features  S...