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Design kit eases signal interface between DACs, amps

Posted: 12 Sep 2008 ?? ?Print Version ?Bookmark and Share

Keywords:design kit? development tool? DAC?

Texas Instruments has launched a support tool that helps designers to evaluate signal chain performance for test and measurement, industrial and communications applications, including arbitrary waveform and signal generators.

The kit makes the complexity of interfacing between high-speed DACs and amplifiers manageable as it uses clocking and power management equipment to further ease design and reduce cycle time. In addition, the tool provides customers with the flexibility to implement alternative design configurations based on the unique requirements of the system, all that can be configured using the user-friendly GUI.

The TSW3070 development kit has a high-speed DAC, two amplifiers, a complete on-board clocking solution and power supply circuitry.

Other features

? DAC5682Z dual-channel, 1Gsps DAC with current sink output
? OPA695 current feedback amplifier with 1.4GHz bandwidth
? THS3091/5 high voltage swing amplifier with 30V supply voltage
? CDCM7005 jitter cleaner with 800MHz voltage-controlled oscillators and 10MHz reference
? TPS7675x, TPS5430, UCC284-5 on board voltage supply solution from a single 6V wall supply

The kit also has a GUI for better DAC configuration. It gives the designers flexibility to have multiple configuration options. The DAC5682Z converter with LVDS interface offers many digital features usually configured by using GUI such as:

? Flexible low-, high-, or bypass filter modes
? Interpolation: 2x, 4x or bypass
? Optional Fs/4 or Fs/8 coarse mixer
? 8 sample input data FIFO

Designers can have the DAC output to either the OPA695 or the THS3091/5, letting customers to examine a high-frequency signal to support wide bandwidth or a large signal swing. The amplifiers also eases the signal chain needs for level shifting, gain and differential to single-ended conversion while noting the DAC compliance voltage and output current requirements. As an alternative, designers can bypass the amplifiers and send the signal to a passive transformer output without gain.

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