16-Bit, 2.5 Gsps DAC Delivers 74 dB Spurious Free Dynamic Range
Linear Technology Corp. announces the LTC2000, a 16-bit 2.5 Gsps digital-to-analog converter (DAC) with exceptional 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 to 3 dB 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 ±1V compliant outputs feature a 40mA full scale current which can be adjusted as low as10mA or as high as 60mA to suit the application. Data is transferred to the LTC2000 over a parallel LVDS interface port with transfer rates of up to 1.25Gsps using a 625MHz double data rate (DDR) data clock. Dual DDR ports are required to achieve the 2.5Gsps update rate, while a single port can be used to operate at a lower 1.25Gsps update rate. At 2.5Gsps, the LTC2000 consumes 2.2W from dual 1.8V and 3.3V supplies, while at 1.25Gsps the device consumes just 1.3W. 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 9mm x 15mm BGA package. The LTC2000 is available in production today in commercial and industrial temperature grades, competitively priced, starting at $69.00 each for the LTC2000-16 in 1,000-piece quantities. Demoboards and samples are available via the Linear Technology website www.linear.com/product/LTC2000
Summary of Features: LTC2000
- 80dBc SFDR at 70MHz fOUT
- >68dBc SFDR from DC to 1000MHz fOUT
- 40mA Nominal Full-Scale, ±1V Output Compliant
- 10mA to 60mA Adjustable Full-Scale Current Range
- Single or Dual Port DDR LVDS & DHSTL Interface
- Low Latency (7.5 Cycles for Single Port, 11 Cycles for Dual Port)
- >78dBc 2-Tone IMD from DC to 1000MHz
- -165dBc/Hz Additive Phase Noise at 1MHz Offset from 65MHz fOUT
- 170-Lead (9mm x 15mm) BGA Package
The USA list pricing shown is for budgetary use only. International prices may differ due to local duties, taxes, fees and exchange rates.
