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TI's 12-bit, 8-channel, I2C-interface DAC targets multi-channel, high-density applications

First 8-channel DAC with I2C interface from TI provides low power, high accuracy in a small package

Nov 16, 2010

DALLAS, Nov. 16, 2010 /PRNewswire/ -- Texas Instruments Incorporated (TI) (NYSE: TXN) today introduced a 12-bit, 8-channel digital-to-analog converter (DAC) with I2C interface for multi-channel, high-density applications, such as power amplifier control in wireless base stations, portable instrumentation, data acquisition systems and laser bias control. The DAC7678 is the first 8-channel DAC from TI with a 2-wire I2C interface, which simplifies layout and minimizes design time. The DAC7678 includes integrated output buffer amplifiers and 2.5-V internal reference, and it can be configured to reset to zero or mid-scale. For more information on this new data converter, visit www.ti.com/dac7678-pr.

Key features and benefits:

  • High channel count integration, I2C interface, and integrated precision reference simplify layout and minimize design time for high-density applications, while a 24-pin, 4-mm x 4-mm QFN package saves board space, making it suitable for portable applications.
  • Integrated precision reference with low drift, +/- 5 mV initial accuracy and 20-mA sink/source capability eliminates the need for external reference, saving board space and cost.
  • Excellent low-power performance of 0.13 mA/channel at 5 V allows designers to achieve high accuracy of +/- 1 LSB maximum INL, settling time of 7 us and ultra-low glitch of 0.15 nV-s.
  • Fully characterized over a wide temperature range of -40 C to 125 C for use in industrial applications.

 Availability and pricing

The DAC7678 is available now in a 4-mm x 4-mm QFN-24 or a 5-mm x 6-mm TSSOP-16 package. Suggested resale pricing starts at $6.00 for 1,000-unit quantities.

8-bit (DAC5578), 10-bit (DAC6578) and 12-bit (DAC7578) versions without an integrated precision reference are also available. Suggested resale pricing starts $3.00, $3.90, $5.50, respectively, in 1,000-unit quantities.

Tools and complementary devices

An evaluation module for the DAC7678 (DAC7678EVM) is available today, priced at $75. It can also be used with the DAC5578, DAC6578 and DAC7578.

When designing with the DAC7678, DAC5578, DAC6578 and DAC7578, customers can speed time-to-market by using compatible TI products, such as the Stellaris® LM3S1138 microcontroller, TMP101 digital temperature sensor and OPA564 operational amplifier.

Additionally, the REF5050I voltage reference can be used when a more precise external reference is needed.  The REF5050I, which provides a highly accurate reference with a low drift of 3 ppm/degree C and low noise of 3 mVpp/V, can sink and source and is very tolerant of line and load changes.

Support is available in the Data Converters forum in the TI E2E™ Community, where customers can ask questions, share knowledge, explore ideas, and help solve problems.

Learn more about TI's data converter portfolio by visiting the links below:

 About Texas Instruments

Texas Instruments (NYSE: TXN) helps customers solve problems and develop new electronics that make the world smarter, healthier, safer, greener and more fun. A global semiconductor company, TI innovates through manufacturing, design and sales operations in more than 30 countries.  For more information, go to www.ti.com.  


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SOURCE Texas Instruments Incorporated