AD8802ARZ-REEL

Overview

The AD8802ARZ-REEL is a 12-channel, 8-bit TrimDAC with power shutdown in a 20-lead SOIC package. It provides independent digitally controllable voltage outputs using an R-2R ladder architecture. The device operates on a single +3 V to +5 V supply and features a 3-wire SPI compatible serial interface for programming. Key specifications include a settling time of 0.6 μs, differential nonlinearity error of ±1/4 LSB, and integral nonlinearity error of ±1.5 LSB. Power consumption is minimized with a shutdown mode drawing less than 55 mW.

Feature Summary

• 12 independent 8-bit DAC channels with individual latches
• 3-Wire SPI compatible serial input interface
• Power shutdown mode reduces current consumption significantly
• Midscale preset function via RS pin for initial setting

Applications

• Video amplifier gain control
• CRT computer graphic display geometric correction
• Voltage controlled frequencies and bandwidths
• Trimmer replacement in new designs

Procurement Notes

Verify the REEL suffix indicates tape-and-reel packaging when sourcing. Confirm the specific lot date code against project requirements as this component may be subject to obsolescence notices. Ensure ESD precautions are followed during handling due to the sensitivity of the CMOS inputs.

Selection Notes

Select the AD8802 variant if a fixed ground reference (VREFL = GND) is acceptable. Choose the AD8804 if independent zero-scale adjustment via a separate VREFL pin is required. Verify that the 5 kΩ output impedance meets the load driving requirements or requires buffering.

Part Context

This component belongs to the AD8802/AD8804 family of TrimDACs designed to replace mechanical potentiometers. It shares architectural similarities with other multi-channel digital potentiometers but is distinct in its specific 12-channel configuration and R-2R ladder implementation for voltage output rather than resistance variation.

Replacement Considerations

Public confirmed substitute part numbers: None.