资 源 简 介
The AD8582 is a complete， parallel input， dual 12-bit， voltage output DAC designed to operate from a single +5 volt supply. Built using a CBCMOS process， this monolithic DAC offers the user low cost， and ease-of-use in +5 volt only systems. Included on the chip， in addiTIon to the DACs， are a rail-to-rail amplifier， latch and reference. The reference （VREF） is trimmed to 2.5 volts output， and the on-chip amplifier gains up the DAC output to 4.095 volts full scale. The user needs only supply a +5 volt supply. The AD8582 is coded natural binary. The op amp output swings from 0 volt to +4.095 volts for a one-millivolt-per-bit resoluTIon， and is capable of driving ±5 mA. OperaTIon down to 4.3 V is possible with output load currents less than 1 mA
The high speed parallel data interface connects to the fastest processors without wait states. The double-buffered input structure allows the user to load the input registers one at a TIme， then a single load strobe tied to both LDA + LDB inputs will update both DAC outputs simultaneously. LDA and LDB can also be activated independently to immediately update their respective DAC registers. An address input decodes DAC A or DAC B when the chip select CS input is strobed. An asynchronous reset input sets the output to zero scale. The MSB bit can be used to establish a preset to midscale when the reset input is strobed. The AD8582 is available in the 24-pin plastic DIP and the surface mount SOIC-24. Each part is fully specified for operation over –40°C to +85°C， and the full +5 V ± 5% power supply range.
