TRF3705

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TRF3705 SLWS223B – AUGUST 2011 – REVISED NOVEMBER 2015 TRF3705 300-MHz to 4-GHz Quadrature Modulator 1 Features 1 High Linearity: – Output IP3: 30 dBm at 1850 MHz Low Output Noise Floor: –160 dBm/Hz 78-dBc Single-Carrier WCDMA ACPR at –10-dBm Channel Power Unadjusted Carrier Suppression: –40 dBm Unadjusted Sideband Suppression: –45 dBc Single Supply: 3.3-V Operation 1-bit Gain Step Control Fast Power-Up/Power-Down 2 Applications Cellular Base Station Transmitter CDMA: IS95, UMTS, CDMA2000, TD-SCDMA LTE (Long Term Evolution) TDMA: GSM, EDGE/UWC-136 Multicarrier GSM (MC-GSM) Wireless MAN Wideband Transceivers 3 Description The TRF3705 is a low-noise direct quadrature modulator, capable of converting complex modulated signals from baseband or IF directly up to RF. The TRF3705 is a high-performance, superior-linearity device that is ideal to up-convert to RF frequencies of 300 MHz (Note: appropriate matching network is required for optimal performance at 300 MHz) through 4 GHz. The modulator is implemented as a double-balanced mixer. The RF output block consists of a differential-tosingle-ended converter that is capable of driving a single-ended 50-Ω load. The TRF3705 requires a 0.25-V common-mode voltage for optimum linearity performance. The TRF3705 also provides a fast power-down pin that can be used to reduce power dissipation in TDD applications. The TRF3705...