The ±1V compatible output provides a full-range current of 40mA that can be adjusted as low as 10mA or as high as 60mA to suit the application. Data is transmitted to the LTC2000 via parallel LVDS interface ports at a maximum transfer rate of 1.25Gsps using a 625MHz DDR (double data rate) data clock. Dual DDR ports are required to achieve a 2.5Gsps update rate, while a single port can be used to operate at a lower update rate of 1.25Gsps. At 2.5Gsps, the LTC2000 consumes 2.2W from dual 1.8V and 3.3V power supplies, whereas at 1.25Gsps, the device consumes only 1.3W. Designed for ease of use, the LTC2000 provides an internal pattern generator, an LVDS loop-out multiplexer, and junction temperature sensing capabilities that simplify system development and debugging.

The LTC2000 is available in 16-bit, 14-bit, and 11-bit versions in a RoHS-compliant 9mm x 15mm BGA package. The LTC2000 is mass-producible in commercial and industrial temperature grades and is offered at a competitive price. The LTC2000-16 is priced at $69 per unit in 1,000-unit quantities. Demo boards and samples are available on the Linear Technology website at www.linear.com/product/LTC2000.

Photo Caption: 16-bit, 2.5Gsps DAC

Product Features: LTC2000

• 80dBc SFDR at 70MHz fOUT

• SFDR is 68dBc or higher at DC ~ 1000MHz fOUT.

• Compatible with 40mA standard full scale, ±1V output

• Adjustable full-scale current range: 10mA ~ 60mA

• Single or dual port DDR LVDS & DHSTL interface

• Low latency (7.5 cycles when using a single port, 11 cycles when using dual ports)

•2-tone IMD of 78dBc or higher at DC ~ 1000MHz

• –165dBc/Hz adaptive phase noise at 65MHz fOUT with a 1MHz offset

• 170-pin (9mm x 15mm) BGA package