AD8402ARUZ100-REEL

Overview

The AD8402ARUZ100-REEL is a dual-channel, 8-bit digital potentiometer from Analog Devices Inc., housed in a 14-lead TSSOP surface-mount package. It provides two independent variable resistors with a nominal end-to-end resistance of 100 kΩ and ±20% tolerance. The device features 256 tap positions controlled via a 3-wire SPI-compatible serial interface. Operating on a single supply voltage between 2.7 V and 5.5 V, it includes power shutdown capabilities drawing less than 5 μA. The unit operates within an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Dual-channel architecture with 100 kΩ nominal resistance per channel
• 256-position resolution controlled by 3-wire SPI-compatible serial interface
• Power shutdown mode reduces current consumption to under 5 μA
• Extended industrial operating temperature range from -40°C to +125°C

Applications

• Mechanical potentiometer replacement
• Programmable filters, delays, and time constants
• Line impedance matching

Procurement Notes

Verify the specific suffix 'U' confirms the TSSOP-14 package and 'Z' indicates lead-free compliance. Confirm the '100' designation corresponds to the 100 kΩ resistance value. Check for RoHS compliance status as manufacturing processes may change over time.

Selection Notes

Select this component when a dual-channel digital solution is required with high resistance values up to 100 kΩ. Ensure the system supports the 3-wire SPI interface and that the 100 kΩ bandwidth (71 kHz) meets signal frequency requirements. Verify that volatile memory behavior aligns with application needs regarding power loss retention.

Part Context

This part belongs to the AD8402 family, which offers dual-channel configurations. It shares core specifications with the AD8400 (single channel) and AD8403 (quad channel). The primary distinction lies in the channel count and package options, with the ARUZ variant specifically utilizing the thin TSSOP form factor.

Replacement Considerations

Direct substitutes include other AD8402 variants with different resistance values or packages, such as AD8402AR10 or AD8402ARZ100. Cross-family replacements like AD8403 require additional pin mapping adjustments due to the quad-channel configuration.