RF2628

RF2628 6 Typical Applications CDMA/FM Cellular Systems Supports Dual-Mode AMPS/CDMA Supports Dual-Mode TACS/CDMA Commercial and Consumer Systems Battery-Operated Systems CDMA/FM UPCONVERTER/BPSK MODULATOR Product Description The RF2628 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 a supply voltage of 2.7V to 5.0V 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 0.192 + 0.008 0.012 0.006 + 0.003 -A- 0.0256 6 MIXERS 0.034 NOTES: 1. Shaded lead is pin 1. 2. All dimensions are exclusive of flash, protrusions or burrs. 3. Lead coplanarity: 0.002 with respect to datum "A". 0.118 + 0.004 sq. 6° MAX 0° MIN 0.021 + 0.004 0.006 + 0.002 ü Package Style: MSOP-8 Si BJT Si Bi-CMOS GaAs HBT SiGe HBT GaAs MESFET Si CMOS Features Supports Dual Mode Operation +9dBm Output Intercept Point Single 2.7V to 5.0V Power Supply IF+...