AD8804ARZ

Overview

The AD8804ARZ is a 12-channel, 8-bit digital-to-analog converter (DAC) from Analog Devices. It features individually programmable voltage outputs controlled via a 3-wire SPI-compatible serial interface. The device operates on a single +3 V to +5 V supply and includes a power shutdown mode consuming less than 55 mW. Key specifications include an 8-bit resolution, 600 ns settling time, and independent zero-scale setting via the VREFL pin. Each channel has its own latch, allowing random access updates. The component is housed in a 20-lead SOIC package.

Feature Summary

• 12 independent 8-bit DAC channels with individual latches
• 3-wire SPI compatible serial input interface
• Power shutdown mode with <55 mW consumption
• Separate VREFH and VREFL pins for flexible output range

Applications

• Video amplifier gain and offset adjustment
• CRT computer graphic display geometric correction
• Voltage-controlled frequency and bandwidth adjustment
• Portable and battery-operated equipment trimmer replacement

Procurement Notes

Verify the specific ordering suffix ARZ corresponds to the SOIC-20 surface mount package variant. Confirm availability status as distribution listings may indicate end-of-life or limited stock conditions. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS inputs.

Selection Notes

Select the AD8804 over the AD8802 when independent zero-scale voltage control is required via the external VREFL pin. The AD8804 allows optimization of resolution for devices with limited voltage control ranges. Verify that the 8-bit resolution and 5 kΩ output impedance meet the system requirements for DC voltage adjustment applications.

Part Context

The AD8804 is part of the TrimDAC family, designed to replace mechanical potentiometers in new designs. It shares functional similarities with the AD8802 but adds the VREFL pin for bidirectional output swing capability. The device integrates 12 voltage-output DACs sharing a common reference input structure within a compact 20-lead form factor.

Replacement Considerations

Public confirmed substitute part numbers: None identified.