DAC1405D650

DAC1405D650 Rev. 01 — 4 May 2009 www.DataSheet4U.com Dual 14-bit DAC, up to 650 Msps; 2× 4× and 8× interpolating Product data sheet 1. General description The DAC1405D650 is a high-speed 14-bit dual channel Digital-to-Analog Converter (DAC) with selectable 2×, 4× or 8× interpolating filters optimized for multi-carrier wireless transmitters. Thanks to its digital on-chip modulation, the DAC1405D650 allows the complex I and Q inputs to be converted up from baseband to IF. The mixing frequency is adjusted via a Serial Peripheral Interface (SPI) with a 32-bit Numerically Controlled Oscillator (NCO) and the phase is controlled by a 16-bit register. Two modes of operation are available: separate data ports or a single interleaved high-speed data port. In the Interleaved mode, the input data stream is demultiplexed into its original I and Q data and then latched. The DAC1405D650 also includes a 2×, 4× and 8× clock multiplier which provides the appropriate internal clocks and an internal regulator to adjust the output full-scale current. 2. Features I Dual 14-bit resolution I 650 Msps maximum update rate I I I I I I I I I I IMD3: 80 dBc; fs = 640 Msps; fo = 96 MHz I ACPR: 71 dBc; 2 carriers WCDMA; fs = 614.4 Msps; fo = 96 MHz; PLL on Selectable 2×, 4× or 8× interpolation I Typical 0.95 W power dissipation at 4× filters interpolation Input data rate up to 160 Msps I Power-down and Sleep modes Very low noise cap-free integrated PLL I Differential scalable output current from 1.6 mA t...