TI: 4-20mA DAC with integrated buck/boost converter
Texas Instruments introduced a digital-to-analog converter that combines leading precision performance with simpler power-supply design. The 16-bit DAC8775 operates from a single, wide 12- to 36-V power rail, leveraging an integrated buck/boost converter to generate all of the required internal power supplies to save designers time, cost and significant board space.
The four-channel DAC8775 addresses the trend in factory automation and process control equipment toward input/output modules that must squeeze more channels into a smaller space. Engineers designing these systems face the challenge of managing power dissipation in a small form factor. By combining a 4-20mA current and voltage driver with a precision reference and a buck/boost converter, the DAC8775 enables a total system footprint that is up to 25 percent smaller than the nearest competing device. Expanding TI’s versatile portfolio of precision data converters, this highly integrated DAC can deliver smaller and more efficient designs with advanced diagnostic capabilities.
A four-channel analog output module reference design demonstrates the combination of the DAC8775 and the LM5166 high-efficiency synchronous buck converter that dissipates less than 1 W of power in factory-automation implementations. Additionally, an evaluation module is available for designers to simulate and optimize the DAC8775.