2013-07-09 Artschip 18-bit DAC suits high-precision ATE
With guaranteed INL (integral nonlinearity) of ¡À2 LSB maximum over temperature, the art5318 18-bit voltage-output DAC from artschip serves as an accurate voltage source for industrial test and measurement, factory automation, and process control. The device also provides DNL (differential nonlinearity) of ¡À1 LSB maximum over its full temperature range of ¨C40¡ãC to +105¡ãC. Housed in a 4.4¡Á7.8-mm, 24-pin TSSOP, the ART5318 integrates both output and reference buffers. No external amplifiers are required. Buffered voltage output results in a fast settling time of 3 ¦Ìs and a low offset and gain drift of ¡À0.5 ppm/¡ãC of FSR typical. The converter¡¯s three-wire SPI interface accepts a 1.8-V to 5.5-V logic input, while its force-sense output maintains accuracy when driving loads with long lead lengths. A negative supply option allows full INL and DNL performance down to 0 V. The ART5318 includes user-programmable digital gain and offset correction to enable easy system calibration. It operates from a supply voltage of 2.7 V to 5.5 V, and at power up, the device resets its outputs to zero or mid-scale.