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

News provided by

Nov 16, 2010, 09:00 ET

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:

Order samples of the DAC7678: www.ti.com/dac7678-pr
Order samples of the DAC7678EVM: www.ti.com/dac7678evm-pr
Check out the DAC7678 data sheet: www.ti.com/dac7678ds-pr
Read the application note, "What Designers Should Know about Data Converter Drift": www.ti.com/dataconverterdrift-pr

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.

Trademarks

All registered trademarks and other trademarks belong to their respective owners.

SOURCE Texas Instruments Incorporated