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DAC5674IPHPR Datasheet(PDF) 1 Page - Texas Instruments |
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DAC5674IPHPR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 39 page DAC5674 SLWS148A − SEPTEMBER 2003 − REVISED OCTOBER 2005 14BIT, 400 MSPS, 2y/4y INTERPOLATING CommsDAC DIGITALTOANALOG CONVERTER 8 FEATURES D 200-MSPS Maximum Input Data Rate D 400-MSPS Maximum Update Rate DAC D 76-dBc SFDR Over Full First Nyquist Zone With Single Tone Input Signal (Fout = 21 MHz) D 74-dBc ACPR W-CDMA at 15.36 MHz IF D 69-dBc ACPR W-CDMA at 30.72 MHz IF D Selectable 2y or 4y Interpolation Filter − Linear Phase − 0.05-dB Pass-Band Ripple − 80-dB Stop-Band Attenuation − Stop-Band Transition 0.4−0.6 Fdata − Interpolation Filters Configurable in Either Low-Pass or High-Pass Mode, Allows For Selection High-Order Images D On-Chip 2y/4y PLL Clock Multiplier, PLL Bypass Mode D Differential Scalable Current Outputs: 2 mA to 20 mA D On-Chip 1.2-V Reference D 1.8-V Digital and 3.3-V Analog Supply Operation D 1.8/3.3-V CMOS Compatible Interface D Power Dissipation: 435 mW at 400 MSPS D Package: 48-Pin TQFP APPLICATIONS D Cellular Base Transceiver Station Transmit Channel − CDMA: W-CDMA, CDMA2000, IS-95 − TDMA: GSM, IS-136, EDGE/UWC-136 D Test and Measurement: Arbitrary Waveform Generation D Direct Digital Synthesis (DDS) D Cable Modem Termination System DESCRIPTION The DAC5674 is a 14-bit resolution, high-speed, digital-to-analog converter (DAC) with integrated 4 × interpolation filter, onboard clock multiplier, and on-chip voltage reference. The device has been designed for high-speed digital data transmission in wired and wireless communication systems, high-frequency direct-digital synthesis (DDS) and waveform reconstruction in test and measurement applications. The 4 × interpolation filter is implemented as a cascade of two 2× interpolation filters, each of which can be configured for either low-pass or high-pass response. This enables the user to select one of the higher order images present at multiples of the input data rate clock while maintaining a low date input rate. The resulting high IF output frequency allows the user to omit the conventional first mixer in heterodyne transmitter architectures and directly up-convert to RF using only one mixer, thereby reducing system complexity and costs. In 4 × interpolation low-pass response mode, the DACs excellent spurious free dynamic range (SFDR) at intermediate frequencies located in the first Nyquist zone (up to 40 MHz) allows for multicarrier transmission in cellular base transceiver stations (BTS). The low-pass interpolation mode thereby relaxes image filter requirements by filtering out the images in the adjacent Nyquist zones. The DAC5674 PLL clock multiplier controls all internal clocks for the digital filters and DAC core. The differential clock input and internal clock circuitry provides for optimum jitter performance. Sine wave clock input signal is supported. The PLL can be bypassed by an external clock running at the DAC core update rate. The clock divider of the PLL ensures that the digital filters operate at the correct clock frequencies. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Excel is a trademark of Microsoft Corporation. CommsDAC and PowerPAD are trademarks of Texas Instruments. All other trademarks are the property of their respective owners. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. www.ti.com Copyright 2005, Texas Instruments Incorporated |
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