High-performance RF transmit kit eases wireless infrastructure design
Texas Instruments Inc. has released an easy-to-use RF transmit signal chain demonstration kit that cuts development time, risk and cost in wireless infrastructure (WI) applications. The demonstration kit provides a complete RF transmitter from digital baseband to analog RF, addressing the RF transmission needs of wireless base station or fixed-wireless access equipment across all of todayís wireless communications standards.
The TSW3000 evaluation module (EVM) combines the DAC5687 16-bit, 500-Msps interpolating digital-to-analog converter (DAC); the CDCM7005 low-phase-noise, low-jitter clock synthesizer and jitter cleaner; the TRF3702 low-noise direct quadrature modulator; and the TRF3750 high-performance, monolithic phase-locked loop (PLL) frequency synthesizer. Designers can use the kit as a working high-performance transmitter front-end chipset, as a tool to evaluate individual componentsí performance in an actual transmitter or as a means to verify system performance at the RF signal without incurring additional engineering costs.
The chipset minimizes noise and distortion, which are key performance issues in WI applications. When interfaced with the TRF3702 in-phase/quadrature (I/Q) modulator, the IQ compensation feature of the DAC5687 allows optimization of phase, gain and dc offset to maximize carrier suppression and sideband rejection, while maximizing power to the modulator. This, in turn, results in an excellent adjacent channel power ratio (ACPR) of 71 dB in a single-carrier WCDMA application at 30.72 MHz intermediate frequency (IF) with a RF local oscillator (LO) of 2.14 GHz. In a two-carrier WCDMA application, the chipset delivers an ACPR of 65 dB at 92.16 MHz IF with a RF LO of 2.14 GHz. In addition, the TSW3000 features I/Q modulation from 1.5 GHz to 2.5 GHz.
The TSW3000 joins other TI tools and solutions for base station designers, including the GC5016 system evaluation kit (GC5016SEK) for evaluating TIís wideband quad digital downconverter/upconverter, and the TSW1100 data capture card and software for evaluating the companyís WI-optimized high-speed analog-to-digital converters. The TSW3000 is available for $499, which includes the EVM, userís guide, software, termination resistors, datasheet for each component, power supply and parallel port cable.
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