The 12-channel AD8802/AD8804 is a 20-pin device that provides independent digitally-controllable voltage outputs. It allows replacement of the mechanical trimmer function in new designs and 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. It is suitable for 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.
The AD8802/AD8804 provides twelve independent, digitally‑controllable voltage outputs in a compact 20‑lead package. Each channel is a programmable 8‑bit DAC that can replace mechanical potentiometers in applications such as video‑amplifier gain control, voltage‑controlled frequency, and CRT graphics correction.
The device operates from a single +3 V to +5 V supply, consumes only about 10 µA in normal mode and enters a sub‑55 µW shutdown state. It features a three‑wire SPI‑compatible serial interface (CS, CLK, SDI) and optional VREFL pin on the AD8804 for independent zero‑scale adjustment.
| Resolution | 8 bits |
|---|---|
| Supply Voltage Range | 2.7 V – 5.5 V |
| Shutdown Current | 10 µA |
| Output Resistance | ≈5 kΩ per channel |
It provides twelve independent voltage‑output channels.
The device operates from 2.7 V to 5.5 V.
The shutdown current is about 10 µA.
Each DAC channel has an 8‑bit resolution.