AD8403ARU50-REEL

Overview

The AD8403ARU50-REEL is a quad-channel, 8-bit digital potentiometer manufactured by Analog Devices. It features four independent resistive channels with a total end-to-end resistance of 50 kΩ and a tolerance of ±20%. Each channel provides 256 tap positions for precise resistance adjustment. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V and consumes less than 10 nA in power-down mode. It utilizes a 3-wire SPI-compatible serial interface for data input and updates at rates up to 10 MHz. The component is housed in a 24-pin TSSOP package and is designed for industrial temperature ranges from -40°C to +125°C.

Feature Summary

• Quad-channel configuration with 256-position variable resistance per channel
• 50 kΩ nominal resistance with linear taper and ±20% tolerance
• SPI-compatible 3-wire serial interface supporting 10 MHz clock rates
• Low power shutdown current of less than 5 μA

Applications

• Mechanical potentiometer replacement in vibration-prone environments
• Programmable filters, delays, and time constants
• Volume control and panning circuits
• Line impedance matching applications

Procurement Notes

Verify the specific suffix 'RU' indicates the TSSOP-24 package variant distinct from the SOIC-24 version. Confirm RoHS compliance status as datasheets may vary by revision. Check for obsolescence notices or lifecycle changes directly from Analog Devices documentation before procurement planning.

Selection Notes

Select this model when a quad-channel digital potentiometer with 50 kΩ resistance is required. Ensure the system supports SPI communication and that the volatile memory architecture aligns with the application's need for initialization upon power-up. Verify that the 2.7 V to 5.5 V supply range matches the target circuit design.

Part Context

This component belongs to the AD8403 family of 1-, 2-, and 4-channel digital potentiometers. The 'ARU' designation specifies the automotive-grade temperature range and TSSOP packaging, while '50' denotes the 50 kΩ resistance value. The '-REEL' suffix indicates tape-and-reel packaging for automated assembly processes.

Replacement Considerations

Direct pin-compatible replacements within the same family include AD8403ARZ50 (SOIC package) or AD8403AN50 (DIP package). Cross-family alternatives like AD5204 offer similar functionality but may differ in channel count or memory type.