RF9938PCBA

RF9938 6 Typical Applications CDMA/TDMA/DCS1900 PCS Systems PHS 1500/ WLAN 2400 Systems General Purpose Upconverter BPSK Modulation Micro-Cell PCS Base Stations Portable Battery-Powered Equipment PCS UPCONVERTER/BPSK MODULATOR Product Description The RF9938 is a complete upconverter designed for PCS 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 is designed as part of the RFMD PCS CDMA Chip Set, consisting of a Transmit IF AGC Amp, this Transmit Upconverter, a Receive LNA/Mixer, and a Receive IF AGC Amp. 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". Optimum Technology Matching® Applied Si BJT Si Bi-CMOS ü Package Style: SOIC-8 GaAs HBT SiGe HBT GaAs MESFET Si CMOS Features Supports Dual Mode Operation +8dBm Output Intercept Point Single 3.6V Power Supply Internally Matched Inputs and Outputs Buffered Output Double-Balanced Mixer IF+ 1 IF- 2 GND 3 LO+ 4 8 RF OUT 7 ...