AD8402AR10

Overview

The AD8402AR10 is a dual-channel, 256-position digital potentiometer from Analog Devices Inc., housed in a 14-lead SOIC package. It features two independent variable resistors with a nominal resistance of 10 kΩ and a linear taper. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V and utilizes an SPI-compatible 3-wire serial interface for control. Key electrical specifications include a typical wiper resistance of 100 Ω at 5 V, a temperature coefficient of 500 ppm/°C, and a shutdown current of less than 5 μA.

Feature Summary

• Dual-channel architecture with 256 programmable tap positions
• SPI-compatible 3-wire serial data input interface
• Power shutdown mode with less than 5 μA current consumption
• Single-supply operation between 2.7 V and 5.5 V

Applications

• Mechanical potentiometer replacement
• Programmable filters, delays, and time constants
• Volume control and panning
• Line impedance matching
• Power supply adjustment

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix 'AR10' corresponds to the 10 kΩ resistance value and SOIC-14 package variant. Check for automotive qualification status if required for the application environment.

Selection Notes

Select this component when a dual-channel digital solution is required with 10 kΩ nominal resistance. Ensure the system supports SPI-compatible signaling and operates within the 2.7 V to 5.5 V supply range. Consider the 14-SOIC footprint constraints and the -40°C to +125°C operating temperature range during PCB layout.

Part Context

The AD8402AR10 belongs to the AD8400/AD8402/AD8403 family of digital potentiometers. While the AD8400 offers a single channel and the AD8403 provides four channels, the AD8402 specifically integrates two independent variable resistors in a compact surface-mount package, serving as a middle ground for multi-channel applications.

Replacement Considerations

Direct substitutes within the same family include the AD8402AN10 (PDIP package) and other resistance variants like the AD8402AR50 or AD8402AR100. Verify pin compatibility and package dimensions before substitution.