●Product Details
●The AD9737A/AD9739A are 11-bit and 14-bit, 2.5 GSPS high performance RF DACs that are capable of synthesizing wideband signals from dc up to 3 GHz. The AD9737A/AD9739A are pin and functionally compatible with the AD9739 with the exception that the AD9737A/AD9739A do not support synchronization or RZ mode, and are specified to operate between 1.6 GSPS and 2.5 GSPS.
●By elimination of the synchronization circuitry, some nonideal artifacts such as images and discrete clock spurs remain stationary on the AD9737A/AD9739A between power-up cycles, thus allowing for possible system calibration. AC linearity and noise performance remain the same between the AD9739 and the AD9737A/AD9739A.
●The inclusion of on-chip controllers simplifies system integration. A dual-port, source synchronous, LVDS interface simplifies the digital interface with existing FGPA/ASIC technology. On-chip controllers are used to manage external and internal clock domain variations over temperature to ensure reliable data transfer from the host to the DAC core. A serial peripheral interface (SPI) is used for device configuration as well as readback of status registers.
●The AD9737A/AD9739A are manufactured on a 0.18 µm CMOS process and operate from 1.8 V and 3.3 V supplies. They are supplied in a 160-ball chip scale ball grid array for reduced package parasitics.
●Product Highlights
● 1. Ability to synthesize high quality wideband signals with bandwidths of up to 1.25 GHz in the first or second Nyquist zone.
● 2. A proprietary quad-switch DAC architecture provides exceptional ac linearity performance while enabling mixmode operation.
● 3. A dual-port, double data rate, LVDS interface supports the maximum conversion rate of 2500 MSPS.
● 4. On-chip controllers manage external and internal clock domain skews.
● 5. Programmable differential current output with an 8.66 mA to 31.66 mA range.
●Applications
● Broadband communications systems
● DOCSIS CMTS systems
● Military jammers
● Instrumentation, automatic test equipment
● Radar, avionics
●### Features and Benefits
● Direct RF synthesis at 2.5 GSPS update rate
● DC to 1.25 GHz in baseband mode
● 1.25 GHz to 3.0 GHz in mix-mode
● Industry leading single/multicarrier IF or RF synthesis
● Dual-port LVDS data interface
● Up to 1.25 GSPS operation
● Source synchronous DDR clocking
● Pin compatible with the AD9739
● Programmable output current: 8.7 mA to 31.7 mA
● Low power: 1.1 W at 2.5 GSPS
