RF9957

RF9957 7 Typical Applications CDMA/FM Cellular Systems CDMA PCS Systems Wireless Local Loop Systems Spread-Spectrum Cordless Phones High Speed Data Modems General Purpose Digital Receivers CDMA/FM RECEIVE AGC AND DEMODULATOR Product Description The RF9957 is an integrated complete IF AGC amplifier and Quadrature Demodulator designed for the receive section of dual-mode CDMA/FM cellular and PCS applications. It is designed to amplify received IF signals, while providing 100dB of gain control range, and demodulate to baseband I and Q signals. Noise Figure, IP3, and other specifications are designed to be compatible with the IS98 and J-STD-018 Interim Standard for CDMA cellular communications. The IC is manufactured on an advanced 15GHz FT Silicon Bipolar process, and is packaged in a standard miniature 24-lead plastic SSOP package. 0.157 0.150 0.0098 0.0040 1 0.344 0.337 0.012 0.008 0.025 0.0688 0.0532 7 QUADRATURE DEMODULATORS 0.2440 0.2284 8°MAX 0°MIN 0.050 0.016 0.0098 0.0075 Optimum Technology Matching® Applied ü Package Style: SSOP-24 Si BJT Si Bi-CMOS GaAs HBT SiGe HBT GaAs MESFET Si CMOS Features Supports Dual Mode Operation (CDMA and FM) FL+ GC 23 19 Digitally Controlled Power Down Mode 2.7V to 3.3V Operation 16 Q OUT+ 15 Q OUT- CDMA IN+ 4 CDMA IN- 5 IN SEL 14 FM IN+ 8 FM IN- 9 Input Select Gain Control Quadrature LO Divider IF AGC Amp with 100dB Gain Control Quad. ÷2 13 LO+ 12 LO21 I OUT+ Band Gap Reference 22 I OUT- ...