• 75-dBc Single-Carrier WCDMA ACPR at -11-dBm Channel Power
• Very Low Noise Floor: -163 dBm/Hz
• OPI3 of 23 dBm
• P1dB of 9 dBm
• Unadjusted Carrier Feedthrough of -40 dBm
• Unadjusted Side-Band Suppression of -40 dBc
• Single Supply: 4.5 V-5.5 V Operation
• Silicon Germanium Technology
• TRF3703-33 With 3.3-V CM at I, Q Baseband Inputs
• TRF3703-15 With 1.5-V CM at I, Q Baseband Inputs
• APPLICATIONS
  • Cellular Base Transceiver Station Transmit Channel
  • CDMA: IS95, UMTS, CDMA2000, TD-SCDMA
  • TDMA: GSM, IS-136, EDGE/UWC-136
  • Wireless Local Loop
  • Wireless MAN Wideband Transceivers

The TRF3703 is a very low-noise direct quadrature modulator, capable of converting complex modulated signals from baseband or IF directly up to RF. The TRF3703 is ideal for high-performance direct RF modulation from 400 MHz up to 4 GHz. The modulator is implemented as a double-balanced mixer. The RF output block consists of a differential to single-ended converter and an RF amplifier capable of driving a single-ended 50- load without any need of external components. The TRF3703 comes in two types, TRF3703-33 and TRF3703-15. The -33 and -15 designators specify the common-mode voltage rating of the device at the I, Q baseband inputs. The -33 requires a 3.3-V common-mode voltage, and the -15 requires a 1.5-V common-mode voltage.