ADI AD9129-EBZ

The AD9119/AD9129 are high performance, 11-/14-bit RF digitalto-analog converters (DACs) supporting data rates up to 2.85 GSPS. The DAC core is based on a quad-switch architecture that enables dual-edge clocking operation, effectively increasing the DAC update rate to 5.7 GSPS when configured for Mix-Mode or 2x interpolation. The high dynamic range and bandwidth enable multicarrier generation up to 4.2 GHz. In baseband mode, wide bandwidth capability combines with high dynamic range to support from 1 to 158 contiguous carriers for CATV infrastructure applications. A choice of two optional 2x interpolation filters is available to simplify the postreconstruction filter by effectively increasing the DAC update rate by a factor of 2. In Mix-Mode operation, the AD9119/AD9129 can reconstruct RF carriers in the second and third Nyquist zone while still maintaining exceptional dynamic range up to 4.2 GHz. The high performance NMOS DAC core features a quad-switch architecture that enables industry-leading direct RF synthesis performance with minimal loss in output power. The output current can be programmed over a range of 9.5 mA to 34.4 mA. The AD9119/AD9129 include several features that may further simplify system integration. A dual-port, source synchronous LVDS interface simplifies the data interface to a host FPGA/ASIC. A differential frame/parity bit is also included to monitor the integrity of the interface. On-chip delay locked loops (DLLs) optimize timing between different clock domains. A serial peripheral interface (SPI) configures the AD9119/ AD9129 and monitors the status of readback registers. The AD9119/AD9129 are manufactured on a 0.18 µm CMOS process and operates from +1.8 V and -1.5 V supplies. It is supplied in a 160-ball chip scale package ball grid array.

• DAC update rate: up to 5.7 GSPS
• Direct RF synthesis at 2.85 GSPS data rate DC to 1.425 GHz in baseband mode DC to 1.0 GHz in 2x interpolation mode 1.425 GHz to 4.2 GHz in Mix-Mode
• Bypassable 2x interpolation
• Excellent dynamic performance
• Supports DOCSIS 3.0 wideband ACLR/harmonic performance 8 QAM carriers: ACLR > 65 dBc
• Industry-leading single/multicarrier IF or RF synthesis 4-carrier W-CDMA ACLR at 2457.6 MSPS f out=900 MHz, ACLR = 71 dBc (baseband mode) f out=2100 MHz, ACLR = 68 dBc (Mix-Mode) f out=2700 MHz, ACLR = 67 dBc (Mix-Mode)
• Dual-port LVDS and DHSTL data interface Up to 1.425 GSPS operation Source synchronous DDR clocking with parity bit
• Low power: 1.0 W at 2.85 GSPS (1.3 W at 5.7 GSPS)

• Broadband communications systems CMTS/VOD
• Wireless infrastructure: W-CDMA, LTE, point-to-point
• Instrumentation, automatic test equipment (ATE)
• Radar, jammers