MAX5484EUD+

Overview

The MAX5484EUD+ is a 10-bit, nonvolatile, linear-taper digital potentiometer configured as a variable resistor. It provides 1024 tap positions with a nominal end-to-end resistance of 50kΩ and a tolerance of ±25%. The device operates on a single supply voltage ranging from +2.7V to +5.25V or dual supplies of ±2.5V. It features an internal EEPROM for power-on recall of the wiper position and supports a pin-selectable 3-wire SPI-compatible serial interface or up/down digital interface. The component is housed in a 14-pin TSSOP package and is specified over an extended temperature range of -40°C to +85°C.

Feature Summary

• 10-bit resolution providing 1024 distinct tap positions
• Nonvolatile memory stores wiper position for initialization at power-up
• Pin-selectable 3-wire SPI-compatible serial interface or up/down digital interface
• Low standby current consumption of 1µA (max)

Applications

• Mechanical potentiometer replacement
• Low-drift programmable gain amplifiers
• LCD contrast adjustment
• Pressure sensor signal conditioning

Procurement Notes

Verify the specific ordering suffix 'EUD+' confirms the 14-pin TSSOP package and lead-free/RoHS compliance status. Confirm that the selected variant matches the required resistance value, as the MAX5484 specifically denotes the 50kΩ variable resistor configuration within the family. Ensure the source documentation explicitly lists this part number to avoid confusion with the MAX5481 through MAX5483 variants which differ in terminal configuration or resistance values.

Selection Notes

Select the MAX5484EUD+ when a 50kΩ variable resistor with 10-bit precision is required. This model is distinct from the MAX5481/MAX5482, which are configured as voltage dividers. Designers must account for the zero-scale resistor error and wiper resistance specifications in their circuit calculations. The choice between SPI and Up/Down interfaces depends on the host controller's available pins and communication protocol requirements.

Part Context

The MAX5484EUD+ belongs to the MAX5481–MAX5484 family of 10-bit nonvolatile digital potentiometers manufactured by Analog Devices / Maxim Integrated. While sharing core architecture and interface capabilities, the MAX5484 is specifically designated as a 2-terminal variable resistor with a 50kΩ end-to-end resistance. Other family members include the MAX5481 (10kΩ voltage divider), MAX5482 (50kΩ voltage divider), and MAX5483 (10kΩ variable resistor).

Replacement Considerations

Direct functional replacements within the same package and specification include the MAX5481EUD+, MAX5482EUD+, and MAX5483EUD+. Note that these alternatives differ in terminal configuration (voltage divider vs. variable resistor) and nominal resistance values (10kΩ vs. 50kΩ). Verify that the circuit design accommodates these electrical differences before substitution.