AD8802AN

Overview

The AD8802AN is a 12-channel, 8-bit TrimDAC from Analog Devices Inc., housed in a 20-lead PDIP package. It provides independent digitally controllable voltage outputs to replace mechanical trimmers. 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 an 8-bit resolution, ±1 LSB integral nonlinearity error, and a typical settling time of 0.6 μs. It includes a power shutdown mode consuming less than 55 μW and a midscale preset function via the RS pin.

Feature Summary

• 12 Independent Channels: Provides 12 separate 8-bit DAC outputs with individual programmability.
• Serial Interface: Utilizes a standard 3-wire SPI compatible input (CS, CLK, SDI) for data loading.
• Power Shutdown: Reduces current consumption to <10 μA while maintaining latch settings.
• Midscale Preset: The RS pin allows asynchronous presetting of all DAC registers to midscale (80H).

Applications

• Automatic Adjustment and Trimmer Replacement
• Video and Audio Equipment Gain and Offset Adjustment
• Portable and Battery Operated Equipment

Procurement Notes

Verify the package option 'N-20' corresponds to the PDIP-20 housing for the AD8802AN model. Confirm the temperature range is -40°C to +85°C. Ensure ESD precautions are observed during handling as the device is electrostatic sensitive. Check for RoHS compliance status if required by specific manufacturing standards.

Selection Notes

Select the AD8802AN when a midscale preset is required for initial power-up conditions. Choose this part over the AD8804 if a fixed zero-scale ground reference is acceptable, as the AD8804 offers a separate VREFL pin for adjustable zero-scale voltage. Ensure the application requires 12 channels within a compact 20-lead footprint.

Part Context

The AD8802AN is part of the AD8802/AD8804 family of TrimDACs. It serves as a digital alternative to mechanical potentiometers. The 'AN' suffix denotes the PDIP-20 package variant. It shares core functionality with the AD8804, differing primarily in the reference input configuration and the presence of the midscale reset feature.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.