TI's latest 16-bit, 500-MSPS dual-channel digital-to-analog converter targets 3G wireless base stations.Addressing the growing demands of wireless carriers for low-noise floor and increased performance devices, Texas Instruments Incorporated (NYSE NYSE See: New York Stock Exchange :TXN TXN Texas Instruments (stock symbol) TXN Transaction (databases) TXN Tunxi, China (Airport Code) TXN Tarxien (postal locality, Malta) ) (TI) has introduced its next generation high performance, dual-channel 500-MSPS digital-to-analog converter (DAC See D/A converter and discretionary access control. DAC - Digital to Analog Converter ). Featuring a greater level of built-in signal processing, the new DAC5687 not only decreases noise, but also reduces radio frequency design requirements and base station costs. The DAC5687 offers optimized gain, phase and offset control features for direct up-conversion architectures using IQ modulators in 3G base stations. This 500-MSPS device also supports today's 3G clock rates, including the more popular 491.52 MHz. As a result, OEMs using the DAC5687 will find that this solution allows them to easily adapt new and emerging 3G standards, as well as soft modem and software defined radio A wireless terminal (phone, PDA, etc.) that is reconfigurable via software. It enables wireless devices to be easily updated to new or later versions of the air interface and allows multiple interfaces to be supported. initiatives, without rebuilding their systems. The DAC5687 delivers a signal-to-noise-ratio (SNR See signal-to-noise ratio. SNR - signal-to-noise ratio ) greater than 75 dBFS and 3rd order intermodulation in·ter·mod·u·la·tion n. Modulation of the frequencies of electromagnetic waves occurring when the waves interact as they are transmitted through a nonlinear electronic system. (IMD IMD - intermodulation distortion 3) greater than 81 dBc while allowing multi- carrier systems to operate with higher output power. Additionally, dissipating only 700 mW at 500-MSPS, the DAC5687 also improves system reliability and enables higher base station channel density. This new addition to TI's family of digital-to-analog converters features flexible modes of operation and is pin compatible with the prior generation DAC5686 thus simplifying system upgrades. "TI continues to provide products that meet 3G base station manufacturers' growing need for flexible, higher performance and lower power analog parts," said Mike Walker, manager of TI's high speed DAC group. "With the DAC5687, TI is pleased to expand its offerings with a new device that meets these critical needs while enabling manufacturers to more easily adapt to new and emerging standards." Featuring analog and DSP (1) (Digital Signal Processor) A special-purpose CPU used for digital signal processing applications (see definition #2 below). It provides ultra-fast instruction sequences, such as shift and add, and multiply and add, which are commonly used in math-intensive products optimized for wireless infrastructure, TI offers the industry's most complete signal chain solution for base station OEMs. TI's end-to-end approach, built on the company's 20 years of experience in the wireless market, allows customers to devote development time and dollars to creating differentiated products and services. In addition to the versatile DAC5687, TI also offers additional low power analog parts and high performance DSPs, including the new GC1115 wideband crest factor reduction processor and TMS320TCI6482 DSP. For developers using the DAC5687, TI provides the DAC5687EVM evaluation module for easy integration of the device into wireless infrastructure base stations and other target applications. Sample units of the DAC5687 are available now. Production units will be available in April 2005 at a cost of $22.50 per 1,000 units. |
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