MAX5405EUB-T

Overview

The MAX5405EUB-T is a dual digital potentiometer IC from the Maxim Integrated family, housed in a compact 10-lead uMAX package. It features two independent 100 kΩ resistive elements, each providing 256 tap positions for precise resistance adjustment. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V with a typical operating current of 800 nA. It utilizes a standard 3-wire serial interface (SPI compatible) for data transmission and control. The wiper memory is volatile, requiring the setting to be reloaded upon power-up. The component supports a linear taper and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Dual-channel architecture with two independent 100 kΩ potentiometers
• 256 discrete tap positions per channel for fine resolution
• Ultra-low power consumption with 800 nA operating current
• Compact 10-lead uMAX surface-mount package

Applications

• Programmable gain amplifiers in signal conditioning circuits
• Voltage reference trimming and calibration
• Adjustable threshold detection circuits
• Battery management system parameter tuning

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing. Confirm RoHS compliance status as '+T' variants typically denote lead-free construction. Ensure the volatile memory characteristic aligns with system power-loss requirements. Check for availability constraints as distribution may vary by region.

Selection Notes

Select this component over non-volatile alternatives if power savings are critical and state retention during power cycles is not required. Compare against the MAX5404 series if a 50 kΩ resistance value is preferred instead of 100 kΩ. Ensure the SPI interface timing matches the host microcontroller's capabilities. Verify that the 100 kΩ resistance value fits the application's noise and loading constraints.

Part Context

This part belongs to the MAX540x series of low-drift digital potentiometers. It shares the same physical footprint and interface protocol with other members like the MAX5404 and MAX5406, differing primarily in resistance values and channel counts. The uMAX package allows for space-constrained designs compared to larger SOIC packages.

Replacement Considerations

The MAX5404EUB+T serves as a functional alternative if a 50 kΩ resistance value is acceptable. The MAX5405EUA+ offers the same specifications but in an 8-pin USOP package, requiring PCB layout adjustments.