AD8400AR10-REEL

Overview

The AD8400AR10-REEL is a single-channel, 8-bit digital potentiometer from Analog Devices. It provides a variable resistance of 10 kΩ with 256 tap positions and linear taper. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V. It features a 3-wire SPI-compatible serial interface for data loading at rates up to 10 MHz. Key electrical characteristics include a nominal temperature coefficient of 500 ppm/°C, a shutdown current of less than 5 μA, and guaranteed monotonic operation. The component is housed in an SOIC-8 surface-mount package.

Feature Summary

• Single-channel 8-bit digital potentiometer with 256 programmable resistance steps
• Nominal resistance of 10 kΩ with ±1% channel-to-channel matching tolerance
• SPI-compatible 3-wire serial interface supporting daisy-chaining via SDO pin
• Power shutdown mode reduces supply current to less than 5 μA

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 specific suffix 'REEL' indicates tape-and-reel packaging when sourcing. Confirm the '10' designation corresponds to the 10 kΩ resistance value variant. Ensure compatibility with the SOIC-8 package dimensions for PCB layout. Check for automotive qualification requirements if applicable to the target environment.

Selection Notes

Select this component for applications requiring a single variable resistor controlled digitally. The 10 kΩ value suits moderate impedance circuits; lower or higher values are available in other variants. The 8-bit resolution offers 256 discrete levels, suitable for general-purpose adjustments. Verify that the 2.7 V to 5.5 V supply range aligns with the system power rails.

Part Context

This part belongs to the AD8400/AD8402/AD8403 family of digital potentiometers. The AD8400 specifically denotes the single-channel version, whereas AD8402 and AD8403 provide dual and quad channels respectively. All members share similar serial interface protocols and core switching technologies but differ in pin counts and package options.

Replacement Considerations

Direct functional replacements within the same family include AD8402 (dual channel) and AD8403 (quad channel), though pinouts differ. Cross-family replacements require verification of interface compatibility and resistance ranges.