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Description:14-Bit, 160 MSPS TxDAC+® with 2x Interpolation Filter
Manufacturer:Analog Devices
Datasheet:PDF (2.32M).
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The AD9772A is a single-supply, oversampling, 14-bit digital-to-analog 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 2 digital interpolation filter and clock multiplier. The onchip 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 single-ended or differential clock driver for optimum jitter performance. For baseband applications, the 2 digital interpolation filter provides a low-pass response, thus providing as much as a threefold reduction in the complexity of the analog reconstruction filter. It does so by multiplying the input data rate by a factor of 2 while suppressing the original upper in-band image by more than 73 dB. For direct IF applications, the 2 digital interpolation filter response can be reconfigured to select the upper in-band image (i.e., high-pass response) while suppressing the original baseband image. To increase the signal level of the higher IF images and their pass-band flatness in direct IF applications, the AD9772A also features a zero-stuffing option in which the data following the 2 interpolation filter is upsampled by a factor of 2 by inserting midscale data samples. The AD9772A can reconstruct full-scale waveforms with bandwidths as high as 67.5 MHz while operating at an input data rate of 160 MSPS. The 14-bit DAC provides differential current outputs to support differential or single-ended applications. REV. B

Click here to download AD9772AASTZ Datasheet
Click here to download AD9772AASTZ Datasheet
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