AD8402ARUZ50-REEL

Overview

The AD8402ARUZ50-REEL is a dual-channel, 8-bit digital potentiometer manufactured by Analog Devices. It provides two independent variable resistors with a nominal resistance of 50 kΩ and 256 tap positions. The device operates on a single supply voltage ranging from 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. Key electrical characteristics 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. It is housed in a TSSOP-14 package.

Feature Summary

• Dual-channel architecture with 256-position variable resistance
• SPI-compatible 3-wire serial interface with daisy-chain capability
• Power shutdown mode consuming less than 5 μA
• Single-supply operation from 2.7 V to 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 the specific ordering suffix against the manufacturer's official documentation to confirm the tape and reel packaging format. Ensure compatibility with the required surface-mount assembly processes for the TSSOP-14 package. Confirm that the component meets the necessary environmental standards for the intended operating temperature range.

Selection Notes

Select this component when a dual-channel solution is required to replace mechanical potentiometers in space-constrained designs. The 50 kΩ resistance value is suitable for applications requiring moderate current handling and lower noise compared to higher resistance variants. Verify that the system logic levels are compatible with the specified input voltage thresholds for the 3-wire serial interface.

Part Context

This part 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. All members of this family share the same core architecture, including the 8-bit resolution and serial control interface, allowing for scalable design implementations.

Replacement Considerations

Direct pin-to-pin replacements within the same family include the AD8402ARZ50 (SOIC-14) or AD8402ARU50 (TSSOP-14). When substituting, verify that the thermal resistance and package dimensions of the alternative are compatible with the existing PCB layout and cooling requirements.