AD8802ARZ

Product Summary

The AD8802ARZ is a 12 Channel, 8-Bit TrimDAC. The 12-channel AD8802ARZ provides independent digitally- controllable voltage outputs in a compact 20-lead package. This potentiometer divider allows replacement of the mechanical trimmer function in new designs. The AD8802ARZ is ideal for dc voltage adjustment applications. Easily programmed by serial interfaced microcontroller ports, the AD8802ARZ with its midscale preset is ideal for potentiometer replacement where adjustments start at a nominal value. Appli- cations such as gain control of video amplifiers, voltage con- trolled frequencies and bandwidths in video equipment, geometric correction and automatic adjustment in CRT com- puter graphic displays are a few of the many applications ideally suited for these parts. The AD8802ARZ provides independent con- trol 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 AD8802ARZ contains 12 voltage-output digital-to-analog converters, sharing a common reference- voltage input. The AD8802ARZ can be used in automatic adjustment, trimmer replacement, video and audio equipment gain and offset adjustment, and portable and battery operated equipment.

Parametrics

AD8802ARZ absolute maximum ratings: (1)VDD to GND: –0.3, + 8 V; (2)VREFX to GND: 0 V, VDD; (3)Outputs (Ox) to GND: 0 V, VDD; (4)Digital Input Voltage to GND: 0 V, +8 V; (5)Operating Temperature Range: –40°C to +85°C; (6)Maximum Junction Temperature (TJ MAX): +150°C; (7)Storage Temperature: –65°C to +150°C; (8)Lead Temperature (Soldering, 10 sec): +300°C.

Features

AD8802ARZ features: (1)low cost; (2)replaces 12 potentiometers; (3)individually programmable outputs; (4)3-wire SPI compatible serial input; (5)power shutdown <55 mwatts including idd & iref; (6)midscale preset, ad8802; (7)separate vrefl range setting, ad8804 +3 v to +5 v single supply operation.

Diagrams