LTC®2000 DACs

LTC®2000 DACs

Linear Technology's LTC2000 is a family of 16-, 14-, 11-bit 2.5 Gsps current-steering DACs with exceptional spectral purity. The single (1.25 Gsps mode) or dual (2.5 Gsps mode) port-source synchronous LVDS interface supports data rates of up to 1.25 Gbps using a 625 MHz DDR data clock, which can be either in quadrature or in phase with the data. An internal synchronizer automatically aligns the data with the DAC sample clock. Additional features such as pattern generation, LVDS loopout and junction temperature sensing simplify system development and testing. A serial peripheral interface (SPI) port allows configuration and read-back of internal registers. Operating from 1.8 V and 3.3 V supplies, the LTC2000 consumes 2.2 W at 2.5 Gsps and 1.3 W at 1.25 Gsps.

Features
  • 80 dBc SFDR at 70 MHz fOUT
  • >68 dBc SFDR from DC to 1000 MHz fOUT
  • 40 mA nominal full-scale, ±1 V output compliant
  • 10 mA to 60 mA adjustable full-scale current range
  • Single- or dual-port DDR LVDS and DHSTL interface
  • Low latency (7.5 cycles for single-port, 11 cycles for dual-port)
  • >78 dBc 2-tone IMD from DC to 1000 MHz fOUT
  • –165 dBc / Hz additive phase noise at 1 MHz offset for 65 MHz fOUT
  • 170-lead (9 mm × 15 mm) BGA package
Applications
  • Broadband communication systems
  • DOCSIS CMTS
  • Direct RF synthesis
  • Radar
  • Instrumentation
  • Automatic test equipment

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