AD8402ARUZ1-REEL

Overview

The AD8402ARUZ1-REEL is a dual-channel, 8-bit digital potentiometer from Analog Devices. It features two independent variable resistors with a nominal resistance of 1 kΩ and 256 tap positions. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V and consumes less than 5 μA in power shutdown mode. It utilizes a 3-wire SPI-compatible serial interface for data input, supporting a 10 MHz update rate. The component is housed in a 14-lead TSSOP package and is qualified for automotive applications.

Feature Summary

• Dual-channel 8-bit digital potentiometer with 256 tap positions
• Nominal resistance of 1 kΩ with ±1% channel-to-channel matching
• SPI-compatible 3-wire serial interface with daisy-chain capability
• Power shutdown mode with current consumption below 5 μA

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and tape-and-reel configuration. Confirm that the 1 kΩ resistance value matches the design requirements, as other variants exist within the AD8402 family. Ensure compatibility with the system's serial clock speeds and logic voltage levels.

Selection Notes

Select this variant for designs requiring dual independent variable resistors in a compact surface-mount package. The 1 kΩ resistance value offers a bandwidth of approximately 5 MHz at -3 dB. Consider the volatile memory nature of the wiper position, which requires re-initialization after power cycles unless external retention is implemented.

Part Context

This component belongs to the AD8400/AD8402/AD8403 family of digital potentiometers. The AD8402 specifically provides two channels in space-saving packages. The 'RUZ' suffix indicates the TSSOP-14 package, while '-REEL' denotes tape-and-reel packaging for automated assembly.

Replacement Considerations

Direct replacements include other AD8402 variants with different resistance values (e.g., AD8402ARZ10, AD8402ARZ50) or packages (e.g., AD8402ARZ). Verify pinout compatibility and electrical specifications such as wiper resistance and temperature coefficient when substituting.