AD8804ANZ

Overview

The AD8804ANZ is a 12-channel, 8-bit TrimDAC with power shutdown, housed in a 20-lead PDIP package. It provides independent digitally controllable voltage outputs using a potentiometer divider 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 an 8-bit resolution, 600 ns settling time, and a separate VREFL pin for zero-scale voltage setting. In shutdown mode, power consumption drops below 55 mW while maintaining DAC latch settings.

Feature Summary

• 12 individually programmable channels with independent DAC latches
• Separate VREFL pin allows independent zero-scale voltage setting
• Power shutdown mode reduces current consumption to <55 mW
• 3-wire SPI compatible serial input interface

Applications

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

Procurement Notes

Verify the AD8804ANZ ordering suffix corresponds to the N-20 PDIP-20 package option within the –40°C to +85°C temperature range. Confirm that the specific revision of the datasheet matches the component lot, as Analog Devices may update documentation without notice. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS input structure.

Selection Notes

Select the AD8804 over the AD8802 when independent adjustment of both the top and bottom ends of the potentiometer divider is required. The AD8804's VREFL pin enables optimization of resolution for devices with limited allowable voltage control ranges. Verify that the application requires 12 channels and 8-bit resolution, as higher precision or channel counts require different device families.

Part Context

The AD8804 is part of the AD8802/AD8804 family of 12-channel, 8-bit TrimDACs. While the AD8802 features a midscale preset via the RS pin, the AD8804 replaces this with a dedicated VREFL pin for flexible zero-scale definition. Both devices share identical digital interfaces, power supply requirements, and physical packaging options, differing primarily in reference input configuration.

Replacement Considerations

Public confirmed substitute part numbers: None identified.