SA9504

INTEGRATED CIRCUITS SA9504 Dual-band, PCS(CDMA)/AMPS LNA and downconverter mixers Preliminary specification Supersedes data of 1999 Aug 24 1999 Oct 28 Philips Semiconductors Philips Semiconductors Preliminary specification Dual-band, PCS(CDMA)/AMPS LNA and downconverter mixers SA9504 DESCRIPTION The SA9504 is an integrated receiver front-end for 900 MHz Cellular (AMPS) and 1.9 GHz PCS (CDMA) phones. This dual-band receiver circuit has low noise amplifiers and downconverters for both bands, and provides an elegant solution for RF-to-IF conversion. The two cascode LNAs have been designed to provide high gain with very low noise figures and high linearity. The downconverter portion is based on the Philips SA9502. There are two individual mixer blocks, each optimized for low noise figure and high linearity. The whole circuit is designed for low power consumption, high performance, and is compatible with the requirements for Cellular (AMPS) and PCS (CDMA) handsets. The circuit has been designed in our advanced QUBiC3 BiCMOS process with 30 GHz fT and 60 GHz fMAX. Downconverter typical performance PARAMETER Gain (dB) Noise Figure (dB) Input IP3 (dBm) Current (mA) (Tx) LO output buffer off Cellular FM 7.5 10 5 6.9 PCS (CDMA) 11.5 9 4 17 FEATURES LNA typical performance PARAMETER Gain (dB) Noise figure (dB) Input IP3 (dBm) Current (mA) Cellular LNA 16.5 1.6 –2 4.9 PCS (CDMA) LNA 14.8 2 1 4.9 Separate, selectable IF outputs to suit FM and CDMA bandwidths Buffered Cellula...