AD8402ARUZ1

Overview

The AD8402ARUZ1 is a dual-channel, 8-bit digital potentiometer from Analog Devices. It provides two independent variable resistors with 256 tap positions in a TSSOP-14 package. The nominal resistance is 1 kΩ with a linear taper and ±1% channel-to-channel matching. It operates on a single supply of 2.7 V to 5.5 V and features an SPI-compatible 3-wire serial interface for data loading at rates up to 10 MHz. The device includes power shutdown capability drawing less than 5 μA and is qualified for automotive applications.

Feature Summary

• Dual-channel 8-bit digital potentiometer with 256 positions
• 1 kΩ nominal resistance with linear taper
• SPI-compatible 3-wire serial interface
• Power shutdown current < 5 μA
• Automotive qualified

Applications

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

Procurement Notes

Verify component authenticity through authorized channels. Confirm the specific suffix '1' corresponds to the 1 kΩ variant as indicated by datasheet ordering guides. Check for end-of-life status or alternative sourcing if production availability is limited.

Selection Notes

Select this part for designs requiring dual independent variable resistors with low power consumption. Ensure the 1 kΩ resistance value fits the circuit's current handling requirements, noting the continuous current limits specified in the absolute maximum ratings table.

Part Context

Part of the AD8400/AD8402/AD8403 family of digital potentiometers. The AD8402 specifically offers two channels, distinguishing it from the single-channel AD8400 and quad-channel AD8403. All share similar control logic and electrical characteristics.

Replacement Considerations

Direct substitutes within the same family include AD8402ARU1 (SOIC-14) or AD8402AN10 (PDIP-14). Verify pin compatibility and package dimensions when replacing.