RF9908

RF9908 6 Typical Applications CDMA/FM Cellular Systems Supports Dual-Mode AMPS/CDMA Supports Dual-Mode TACS/CDMA Commercial and Consumer Systems 3-Cell Battery-Operated Systems CDMA/FM UPCONVERTER/BPSK MODULATOR Product Description The RF9908 is a complete upconverter designed for CDMA/FM cellular applications. The IC contains a double-balanced mixer stage and an output buffer amplifier stage. This device may also be used to directly BPSK modulate a carrier. The mixer is a Gilbert cell with emitter degeneration resistors to provide high IP3. The output stage is a class-B, push-pull configuration to reduce the overall current and still provide a good 50 Ω output match. The unit operates at 3.6V and does not require any external matching components other than coupling capacitors. This circuit is designed as part of the RFMD CDMA Chip Set, consisting of a Transmit IF AGC Amp, this Transmit Upconverter, a Receive LNA/Mixer, and a Receive IF AGC Amp. Optimum Technology Matching® Applied Si BJT Si Bi-CMOS 0.008 0.004 0.018 0.014 -A- 0.196 0.189 0.050 6 0.157 0.150 0.244 0.229 Dimensions in mm 0.068 0.053 8° MAX 0° MIN 0.034 0.016 0.009 0.007 NOTES: 1. Shaded lead is Pin 1. 2. All dimensions are excluding mold flash. 3. Lead coplanarity 0.005 with respect to datum "A". ü Package Style: SOIC-8 GaAs HBT SiGe HBT GaAs MESFET Si CMOS Features Supports Dual Mode Operation +8dBm Input/Output Intercept Point Single 3.6V Power Supply Internally Matched Inputs...