Texas Instruments (TI) (NASDAQ:TXN) today introduceda digital-to-analog converter (DAC) that combines industry-leading precision performance with simpler power-supply design. The16-bitDAC8775operates from a single, wide12- to 36-V power rail, leveraging an integrated buck/boost converter to generate all of the required internal power suppliesto 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 (I/O) modulesthat must squeeze more channels intoa smaller space. Engineers designing these systems facethe challenge of managing power dissipation in a small form factor.By combining a 4-20mA current and voltage driverwith a precision reference and a buck/boost converter, the DAC8775 enablesa 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 integratedDAC can deliver smaller and more efficient designs with advanced diagnostic capabilities.
Key features and benefits of the DAC8775 data converter
· More reliable system design: The DAC8775’s on-chip diagnostic features include smart alarms that monitor open load, short circuit, over-temperature, cyclic redundancy check (CRC), watchdog timerand compliance voltage. Designers canchoose preset actionsthat help detect faults early to facilitatereliable system operation.
· Efficiency with fast response times: The device has an innovative auto-learn featurethatcalculates the load impedance on the 4-20mA loop and clamps the power supply. This enables faster settling time, balancing efficiency with quicker system response.
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