AD8400ARZ1-REEL

Overview

The AD8400ARZ1-REEL is a single-channel, 256-position digital potentiometer from Analog Devices. It features a nominal resistance of 1 kΩ with a temperature coefficient of 700 ppm/°C and operates on a single supply voltage ranging from 2.7 V to 5.5 V. The device utilizes a 3-wire SPI-compatible serial interface for data input, supporting clock rates up to 10 MHz. It includes power shutdown functionality with current consumption below 5 μA and is guaranteed monotonic over the extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Single-channel variable resistor with 256 tap positions
• Nominal resistance of 1 kΩ with ±1% channel-to-channel matching
• 3-wire SPI-compatible serial interface with 10 MHz update rate
• Power shutdown mode with less than 5 μA current consumption

Applications

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

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for automotive qualification requirements if applicable to the target environment. Ensure proper ESD handling procedures are followed during storage and assembly due to the sensitivity of the CMOS internal circuitry.

Selection Notes

Select this part for applications requiring a single digitally controlled variable resistor with low power consumption. The 1 kΩ resistance value suits high-frequency applications where bandwidth is critical, offering a -3 dB bandwidth of 5 MHz. Consider the SOIC-8 package constraints and verify that the 2.7 V to 5.5 V supply range aligns with the system's power architecture.

Part Context

This component belongs to the AD8400/AD8402/AD8403 family of digital potentiometers. While the AD8402 offers dual channels and the AD8403 provides four channels, the AD8400 specifically integrates a single variable resistor in a compact SOIC-8 package. All variants share similar serial interface protocols and electrical characteristics, differing primarily in channel count and physical footprint.

Replacement Considerations

Direct pin-compatible substitutes within the same family include the AD8402 (dual channel) and AD8403 (quad channel), though these require additional unused pins to be managed. Other single-channel digital potentiometers from different manufacturers may require schematic modifications due to differences in interface protocols or pin configurations.