AD8804ARU

Overview

The AD8804ARU is a 12-channel, 8-bit TrimDAC in a TSSOP-20 package. It provides independent digitally controllable voltage outputs with a separate VREFL pin for zero-scale setting. Operating on a single +3 V to +5 V supply, it features a 3-wire SPI compatible serial interface and power shutdown mode consuming less than 55 mW. Static accuracy includes ±1.5 LSB INL and ±1 LSB full-scale error. The device settles within 0.6 μs and maintains latch settings during shutdown.

Feature Summary

• 12 independent 8-bit DAC channels with individual latches
• Separate VREFL pin allows independent zero-scale voltage setting
• Power shutdown mode reduces current consumption below 55 mW
• 3-wire SPI compatible serial interface (CS, CLK, SDI)
• Single +3 V to +5 V supply operation

Applications

• Video amplifier gain and offset adjustment
• CRT computer graphic display geometric correction
• Voltage controlled frequencies and bandwidths
• Portable and battery operated equipment
• Trimmer replacement in DC voltage adjustment circuits

Procurement Notes

Verify the RU suffix indicates the TSSOP-20 package option. Confirm the REFL designation matches the requirement for a dedicated low-side reference input. Check the FTN column for temperature range specifications (-40°C to +85°C). Ensure ESD precautions are observed due to device sensitivity.

Selection Notes

Select the AD8804ARU when independent zero-scale control via VREFL is required, unlike the AD8802 which has an internal GND connection. Choose this part for applications needing 12 channels in a compact surface-mount package. Verify that the 8-bit resolution and 5 kΩ output impedance meet system requirements.

Part Context

The AD8804ARU belongs to the AD8802/AD8804 family of TrimDACs designed to replace mechanical potentiometers. The ARU suffix specifically denotes the 20-lead Thin Shrink Small Outline Package (TSSOP). This component series offers a cost-effective solution for multi-channel digital-to-analog conversion in space-constrained designs.

Replacement Considerations

Public confirmed substitute part numbers: AD8804AN, AD8804AR.