September 10, 2014. Linear Technology has announced the LTC2000, a 16-bit 2.5-GS/s digital-to-analog converter (DAC) with spectral purity of 74 dBc SFDR at 200-MHz output, and better than 68 dBc SFDR for output frequencies from DC to 1 GHz, a 12-dB improvement over alternative 14-bit DACs. The LTC2000 features low phase noise and a wide 2.1-GHz -3dB output bandwidth, enabling broadband or high frequency RF synthesis in applications such as high-end instrumentation, broadband communications, test equipment, cable TV DOCSIS, CMTS, and radar.
The ±1-V compliant outputs feature a 40-mA full scale current which can be adjusted as low as 10 mA or as high as 60-mA to suit the application. Data is transferred to the LTC2000 over a parallel LVDS interface port with transfer rates of up to 1.25 GS/s using a 625-MHz double data rate (DDR) data clock. Dual DDR ports are required to achieve the 2.S/s update rate, while a single port can be used to operate at a lower 1.25-GS/s update rate. At 2.5 GS/s, the LTC2000 consumes 2.2 W from dual 1.8-V and 3.3-V supplies, while at 1.25 GS/s the device consumes just 1.3 W. Designed for ease of use, the LTC2000 offers an internal pattern generator, LVDS loop out mux, and junction temperature sensing to simplify system development and debug.
The LTC2000 is offered in 16-bit, 14-bit and 11-bit versions in a RoHS-compliant 9-mm x 15-mm BGA package. The LTC2000 is available in production today in commercial and industrial temperature grades, starting at $69.00 each for the LTC2000-16 in 1,000-piece quantities. Demoboards and samples are available.