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Description:14-Bit, 150 MSPS TxDAC?? with 2x Interpolation Filter
Manufacturer:Analog Devices
Datasheet:PDF (340K).
Click here to download *)

The AD9772 is a single supply, oversampling, 14-bit digital-toanalog converter (DAC) optimized for baseband or IF waveform reconstruction applications requiring exceptional dynamic range. Manufactured on an advanced CMOS process, it integrates a complete, low distortion 14-bit DAC with a 2x digital interpolation filter and clock multiplier. The on-chip PLL clock multiplier provides all the necessary clocks for the digital filter and the 14-bit DAC. A flexible differential clock input allows for a singleended or differential clock driver for optimum jitter performance. For baseband applications, the 2x digital interpolation filter provides a low pass response, hence providing up to a three-fold reduction in the complexity of the analog reconstruction filter. It does so by multiplying the input data rate by a factor of two while simultaneously suppressing the original upper inband image by more than 73 dB. For direct IF applications, the 2x digital interpolation filter response can be reconfigured to select the upper inband image (i.e., high pass response) while suppressing the original baseband image. To increase the signal level of the higher IF images and their passband flatness in direct IF applications, the AD9772 also features a "zero stuffing" option in which the data following the 2x interpolation filter is upsampled by a factor of two by inserting midscale data samples. The AD9772 can reconstruct full-scale waveforms with bandwidths as high as 63.3 MHz while operating at an input data rate of 150 MSPS. The 14-bit DAC provides differential current outputs to support differential or single-ended applications. A TxDAC+ is a trademark of Analog Devices, Inc.

Click here to download AD9772AST Datasheet
Click here to download AD9772AST Datasheet
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