AD8402AN10

Overview

The AD8402AN10 is a dual-channel, 256-position digital potentiometer from Analog Devices Inc., housed in a 14-lead PDIP 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 data input. Key electrical specifications include a typical wiper resistance of 100 Ω at 5 V, a temperature coefficient of 500 ppm/°C, and a power shutdown current of less than 5 μA. The component supports an update data loading rate of 10 MHz and functions within an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Dual-channel configuration with 256 programmable positions per channel
• SPI-compatible 3-wire serial interface with 10 MHz update rate
• Single-supply operation between 2.7 V and 5.5 V
• Power shutdown mode with current consumption below 5 μA

Applications

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

Procurement Notes

Verify the specific ordering suffix 'AN' confirms the 14-lead PDIP package variant when sourcing. Confirm the '10' suffix indicates the 10 kΩ nominal resistance value. Check manufacturer documentation for current production status, as older variants may be subject to discontinuation notices or require verification of available stock through authorized distributors.

Selection Notes

Select this component for designs requiring dual independent variable resistors in a through-hole format. Ensure the system logic levels are compatible with the specified VIH and VIL thresholds for the chosen supply voltage. Consider the 100 Ω typical wiper resistance at 5 V operation when calculating signal integrity and load requirements. Verify that the 256-position resolution meets the required adjustment granularity for the application.

Part Context

This part belongs to the AD8400/AD8402/AD8403 family of digital potentiometers. The AD8402 specifically provides two channels in space-saving packages, including SOIC-14 and 14-lead PDIP. The family shares common features such as volatile memory, linear taper options, and automotive qualification availability, distinguishing it from other resistor networks by its digital programmability and serial interface capabilities.

Replacement Considerations

Direct substitutes within the same family include the AD8402AR10 (SOIC-14 package) and AD8402AN50 (PDIP package, 50 kΩ). When replacing, verify that the pinout remains identical and that the package thermal characteristics match the PCB layout constraints.