DAC1205D650 Dual 12-bit DAC, up to 650 Msps 2 4 and 8 interpolating Rev. 04 2 July 2012 Product data sheet 1. General description The DAC1205D650 is a high-speed 12-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 DAC1205D650 allows the complex I and Q inputs to be converted up from BaseBand (BB) to IF. The mixing frequency is adjusted using a Serial Peripheral Interface (SPI) with a 32-bit Numerically Controlled Oscillator (NCO). 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 DAC1205D650 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 and benefits Dual 12-bit resolution IMD3: 79 dBc f = 640 Msps f =96MHz s o 650 Msps maximum update rate ACPR: 68 dB 2 carriers WCDMA f = 614.4 Msps f = 115.2 MHz PLL on s o Selectable 2 , 4 or 8 interpolation Typical 0.95 W power dissipation at 4 filters interpolation Input data rate up to 160 Msps Power-down and Sleep modes Very low noise cap-free integrated PLL Differential scalable output current from 1.6 mA to 22 mA 32-bit programmable NCO frequency On-chip 1.29 V reference Dual-port or Interleaved data modes External analog offset control (10-bit auxiliary DACs) 1.8 V and 3.3 V power supplies Internal digital offset control LVDS compatible clock Inverse (sin x) / x function Twos complement or binary offset Fully compatible SPI port data format 3.3 V CMOS input buffers Industrial temperature range from 40 C to +85 C Integrated Device Technology DAC1205D650 Dual 12-bit DAC, up to 650 Msps 2 4 and 8 interpolating 3. Applications Wireless infrastructure: LTE, WiMAX, GSM, CDMA, WCDMA, TD-SCDMA Communication: LMDS/MMDS, point-to-point Direct Digital Synthesis (DDS) Broadband wireless systems Digital radio links Instrumentation Automated Test Equipment (ATE) 4. Ordering information Table 1. Ordering information Type number Package Name Description Version DAC1205D650HW-C1 HTQFP100 plastic thermal enhanced thin quad flat package 100 leads SOT638-1 body 14 14 1 mm exposed die pad DAC1205D650 4 IDT 2012. All rights reserved. Product data sheet Rev. 04 2 July 2012 2 of 41