MAX5481ETE+T

Overview

The MAX5481ETE+T is a 10-bit, nonvolatile, linear-taper digital potentiometer manufactured by Analog Devices Inc./Maxim Integrated. It functions as a programmable voltage divider with 1024 tap positions and an end-to-end resistance of 10kΩ. The device features a pin-selectable 3-wire SPI-compatible serial interface or up/down digital interface for wiper control. It operates on a single supply from +2.7V to +5.25V or dual supplies of ±2.5V. Key electrical characteristics include a nominal temperature coefficient of 35ppm/°C end-to-end and 5ppm/°C ratiometric. Standby current is typically 1µA, while programming current reaches 400µA max.

Feature Summary

• 10-bit resolution providing 1024 distinct tap positions
• Nonvolatile EEPROM stores wiper position for power-on recall
• Pin-selectable 3-wire SPI-compatible or Up/Down digital interface
• Low standby supply current of 1µA (max)

Applications

• Gain and offset adjustment in signal conditioning circuits
• LCD contrast adjustment
• Pressure sensor signal conditioning
• Low-drift programmable gain amplifiers

Procurement Notes

Verify the component authenticity through official Analog Devices channels or authorized distributors. Confirm the package type matches the 16-pin TQFN specification. Ensure the ordering suffix corresponds to the lead-free/RoHS-compliant variant indicated by the '+' designation. Check for any specific storage or handling requirements related to electrostatic discharge sensitivity.

Selection Notes

Select the MAX5481ETE+T when a 10kΩ end-to-end resistance is required for voltage divider applications. Choose this model over the MAX5482 if lower resistance values are needed. Ensure the system supports either the SPI or Up/Down interface modes via the SPI/UD pin. Verify that the operating voltage range of 2.7V to 5.25V aligns with the system power rails.

Part Context

The MAX5481 is part of the MAX5481–MAX5484 family of 10-bit nonvolatile digital potentiometers. While the MAX5481 and MAX5482 function as voltage dividers with 10kΩ and 50kΩ resistances respectively, the MAX5483 and MAX5484 operate as variable resistors. All devices share similar nonvolatile memory and interface capabilities but differ in terminal configuration and resistance values.

Replacement Considerations

Direct replacements within the same family include the MAX5482ETE+T for a 50kΩ voltage divider application. For variable resistor configurations, consider the MAX5483ETE+T (10kΩ) or MAX5484ETE+T (50kΩ). Ensure the replacement maintains the 16-pin TQFN package and nonvolatile memory functionality.