资 源 简 介
The 12-channel AD8802/AD8804 provides independent digitallycontrollable voltage outputs in a compact 20-lead package. This potenTIometer divider TrimDAC® allows replacement of the mechanical trimmer funcTIon in new designs. The AD8802/ AD8804 is ideal for dc voltage adjustment applicaTIons. Easily programmed by serial interfaced microcontroller ports， the AD8802 with its midscale preset is ideal for potenTIometer replacement where adjustments start at a nominal value. Applications such as gain control of video amplifiers， voltage controlled frequencies and bandwidths in video equipment， geometric correction and automatic adjustment in CRT computer graphic displays are a few of the many applications ideally suited for these parts. The AD8804 provides independent control of both the top and bottom end of the potentiometer divider allowing a separate zero-scale voltage setting determined by the VREFL pin. This is helpful for maximizing the resolution of devices with a limited allowable voltage control range. Internally the AD8802/AD8804 contains 12 voltage-output digital-to-analog converters， sharing a common referencevoltage input.
