AD9774

Obsolete

14-Bit, 32 MSPS TxDAC® with 4x Interpolation Filters

Data Sheet (Rev. B) Product Selection Table

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Overview

Single 3 V or 5 V Supply
14-Bit DAC Resolution and Input Data Width
32 MSPS Input Data Rate at 5 V
13.5 MHz Reconstruction Bandwidth
12 ENOBS @ 1 MHz

77 dBc SFDR @ 5 MHz
4x Interpolation Filter
69 dB Image Rejection
84% Passband to Nyquist Ratio
0.002 dB Passband Ripple
23 3/4 Cycle Latency
Internal 4x Clock Multiplier
On-Chip 1.20 V Reference
44-Lead MQFP Package

The AD9774 is a single supply, oversampling, 14-bit digital-to-analog converter (DAC) optimized for waveform reconstruction applications requiring exceptional dynamic range. Manufactured on an advanced CMOS process, it integrates a complete, low distortion 14-bit DAC with a 4´ digital interpolation filter and clock multiplier. The two-stage, 4´ digital interpolation filter provides more than a six-fold reduction in the complexity of the analog reconstruction-filter. It does so by multiplying the input data rate by a factor of four while simultaneously suppressing the original inband images by more than 69 dB. The on-chip clock multiplier provides all the necessary clocks. The AD9774 can reconstruct full-scale waveforms having bandwidths as high as 13.5 MHz when operating at an input data rate of 32 MSPS and a DAC output rate of 128 MSPS.