AD8402AR10-REEL

Overview

The AD8402AR10-REEL is a dual-channel, 256-position digital potentiometer from Analog Devices. It operates on a single supply voltage ranging from 2.7 V to 5.5 V and features an SPI-compatible serial interface for data input. The device provides two independent variable resistors with a nominal resistance of 10 kΩ and a linear taper. Each channel includes a volatile latch to store the wiper position, allowing settings to be retained during active operation. The component supports power shutdown modes with current consumption below 5 μA and functions reliably across an extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Dual-channel configuration with 256 programmable tap positions
• SPI-compatible 3-wire serial interface with daisy-chain capability
• Nominal resistance of 10 kΩ with ±1% channel-to-channel matching
• Power shutdown mode reducing supply current to less than 5 μA

Applications

• Mechanical potentiometer replacement in compact designs
• Programmable filters, delays, and time constants
• Volume control and audio panning circuits
• Line impedance matching applications

Procurement Notes

Verify the specific ordering suffix REEL indicates tape-and-reel packaging when sourcing this component. Confirm that the AR variant corresponds to the standard SOIC-14 package dimensions required for the target PCB layout. Ensure compatibility with the 2.7 V to 5.5 V supply range and check for any automotive qualification requirements if applicable to the end-use environment.

Selection Notes

Select the AD8402AR10-REEL when a dual-channel solution is required within a space-constrained surface-mount footprint. The 10 kΩ resistance value is suitable for moderate signal levels, while the 256-position resolution offers fine adjustment capabilities. Consider the volatile memory nature of the latches, which requires re-initialization after power cycles unless external retention logic is implemented.

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 addresses applications needing two independent variable resistors. The 'AR' designation typically refers to the SOIC-14 package, distinguishing it from PDIP or TSSOP variants available within the same functional family.

Replacement Considerations

Direct substitutes include other parts from the AD8402 series with different resistance values or packaging options, such as AD8402ARZ10 or AD8402ARZ100. Verify pin compatibility and electrical specifications before swapping, particularly regarding the nominal resistance tolerance and package thermal characteristics.