AD8401AR

Overview

The AD8401AR is a single-channel, 8-bit digital potentiometer manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 2.7 V to 5.5 V and features a resistance value of 1 kΩ with a linear taper. The device utilizes a 3-wire serial interface compatible with SPI for data input and offers 256 tap positions. Key electrical characteristics include a power shutdown current of less than 5 μA and an update data loading rate of 10 MHz. It is housed in an 8-SOIC package and supports automotive application qualifications.

Feature Summary

• Single-channel 8-bit digital potentiometer with 1 kΩ resistance
• 256-position variable resistance device replacing mechanical potentiometers
• 3-wire, SPI-compatible serial data input interface
• Power shutdown mode with current consumption less than 5 μA

Applications

• Automotive systems requiring qualified digital components
• Industrial control circuits needing programmable resistance
• Consumer electronics utilizing single-supply operation

Procurement Notes

Verify the specific suffix 'AR' against the manufacturer's official documentation to confirm package type and temperature range specifications. Confirm RoHS compliance status as indicated in the latest datasheet revision. Check for end-of-life or obsolescence notices directly from Analog Devices before procurement planning.

Selection Notes

Select the AD8401AR when a single-channel configuration with 1 kΩ resistance is required. Ensure the system voltage falls within the 2.7 V to 5.5 V operating range. Consider the AD8402 or AD8403 if multiple channels are needed, or different resistance values such as 10 kΩ, 50 kΩ, or 100 kΩ if the 1 kΩ variant does not meet circuit requirements.

Part Context

The AD8401AR belongs to the AD8400/AD8402/AD8403 family of digital potentiometers. This series is designed to replace traditional mechanical potentiometers in various applications. The family shares common features including volatile memory, serial interface compatibility, and low power shutdown capabilities across different channel counts and resistance values.

Replacement Considerations

Publicly confirmed substitute part numbers for the AD8401AR were not found in the provided source material. Verify cross-references through official Analog Devices documentation or authorized distributor databases.