AD8400ARZ100-REEL

Overview

The AD8400ARZ100-REEL is a single-channel, 8-bit digital potentiometer from Analog Devices. It provides a digitally controlled variable resistor with a nominal end-to-end resistance of 100 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 serial interface for data loading at rates up to 10 MHz. It includes power shutdown capabilities 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 100 kΩ nominal resistance and 256 linear tap positions
• SPI-compatible 3-wire serial interface supporting daisy-chaining via SDO pin
• Power shutdown mode reduces supply current to less than 5 μA
• Guaranteed monotonic operation across the full industrial temperature range

Applications

• Mechanical potentiometer replacement in automated systems
• Programmable filters, delays, and time constants
• Line impedance matching
• Power supply adjustment

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm lot traceability and RoHS compliance status prior to integration. Ensure storage conditions adhere to moisture sensitivity level requirements to prevent package damage during soldering processes.

Selection Notes

Select this part when a single channel of high-resistance digital control is required. The 100 kΩ value suits applications needing low leakage currents. Verify that the system logic levels are compatible with the 2.7 V to 5.5 V operating range. Consider the SOIC-8 package dimensions for PCB layout constraints.

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 surface-mount package, optimizing space for single-channel designs.

Replacement Considerations

Direct functional substitutes within the same family include the AD8402ARZ100-REEL (dual channel) and AD8403ARZ100-REEL (quad channel), provided additional channels are acceptable. Cross-family replacements require verification of pin compatibility, resistance tolerance, and interface protocols.