AD8402ARUZ10-REEL

Overview

The AD8402ARUZ10-REEL is a dual-channel, 256-position digital potentiometer from Analog Devices. It operates on a single 2.7 V to 5.5 V supply and features an SPI-compatible 3-wire serial interface with a 10 MHz update rate. The device provides two independent variable resistors in a 14-lead TSSOP package, replacing mechanical potentiometers. Each channel offers linear taper with a nominal resistance of 10 kΩ and a temperature coefficient of 500 ppm/°C. It includes power shutdown capability drawing less than 5 μA and supports daisy-chaining via a serial data output pin.

Feature Summary

• Dual-channel 256-position variable resistor with 10 kΩ nominal resistance
• SPI-compatible 3-wire serial interface supporting 10 MHz clock rates
• Single-supply operation from 2.7 V to 5.5 V with <5 μA shutdown current
• 14-lead TSSOP surface-mount package for space-constrained designs

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 ordering suffix 'U' confirms the TSSOP-14 package variant, as standard 'R' suffixes typically denote SOIC-14. Confirm 'Z' indicates RoHS compliance. Check manufacturer documentation for automotive qualification status, as this specific package may differ from qualified variants. Ensure serial interface voltage levels match system logic requirements.

Selection Notes

Select this component when dual-channel digital adjustment is required in a compact footprint. The TSSOP-14 package suits applications where board space is limited compared to SOIC-14. Verify that the 10 kΩ resistance value aligns with circuit impedance needs. Consider the volatile memory type, which requires reprogramming after power cycles unless external retention is implemented.

Part Context

This part belongs to the AD8400/AD8402/AD8403 family of digital potentiometers. The AD8402 specifically denotes the dual-channel configuration. The 'U' suffix identifies the thin TSSOP package option, distinct from the standard SOIC-14 ('R') or PDIP ('N') packages offered within the same electrical specification set.

Replacement Considerations

Direct substitutes include other AD8402 variants with different packages (e.g., AD8402ARZ10 for SOIC-14) if pin compatibility allows. Cross-family replacements like AD520x series require verification of interface protocols and pinouts. No other manufacturers are confirmed as direct equivalents in the provided documentation.