information furnished by intronics is believed to be accurate and reliable. however, no responsibility is assumed by intronics for its use; nor for any infringements of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of intronics. 1400 providence highway, building #2 norwood, ma 02062 ph o ne ( 7 81 ) 551-5500 fa x ( 781 ) 551-5555 www.intronicspower.com features integral nonlinearity: 0.00076% fsr max differential nonlinearity: 0.00076% fsr max low differential nonlinearity t.c.: 1 ppm/ c max wide power supply operation: 11.5v to 16v fast settling: 6 m s to 0.00076% fsr small size 2" x 2" x 0.4" applications automatic test equipment digital audio sonar robotics nuclear instrumentation general description the dac1146 is a low cost, 18-bit resolution (1 part in 262,144), digital-to-analog converter that provides high accuracy, high stability and is contained in a 2" x 2" x 0.4" module. integral and differential nonlinearity are both guaranteed at 0.00076% fsr maximum. additional guaranteed performance features include: differential nonlinearity t.c. 1ppm/ c maximum, offset t.c. 30 m v/ c maximum, gain t.c. 12ppm/ c maximum, bipolar offset t.c. 7ppm/ c maximum. the dac1146 makes use of cmos integrated circuits, thin-film resistor technology and proprietary cmos current-steering switches to obtain high resolution, high reliability and small size. the calculated mtbf for the dac1146 is 275,445 hours, per mil handbook 217c. the dac1146 can operate with power supplies ranging from 11.5v to 16.0v. an internal precision reference is provided, an external reference can be used. the external reference voltage input range is - 12v to +12v. the analog output ranges include: +5v, +10v, 5v, 10v, - 2ma and 1ma, and are selectable via pin programming (see figure 1). digital input coding for unipolar operation is true binary, bipolar input coding is offset binary or 2's complement. low cost/high accuracy 18-bit d/a/ converter dac1146 fi gure 1. dac1146 block di agram
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