MAX5391MATE+

Overview

The MAX5391MATE+ is a dual 256-tap volatile digital potentiometer with a 50kΩ end-to-end resistance. It operates from a single +1.7V to +5.5V supply and features an SPI-compatible interface. The device includes two independent voltage-divider circuits, each with 255 fixed resistors and a programmable wiper. Key electrical specifications include a maximum integral nonlinearity (INL) of ±0.5 LSB in voltage-divider mode and a typical quiescent supply current of 12μA at 1.7V. It utilizes an internal charge pump to maintain low wiper resistance down to 1.7V.

Feature Summary

• Dual 256-tap linear taper positions with 50kΩ end-to-end resistance
• SPI-compatible 3-wire serial interface for wiper control
• -40°C to +125°C automotive temperature range operation
• Internal charge pump ensures wiper resistance <200Ω at VDD = 1.7V

Applications

• Low-voltage battery applications
• Portable electronics
• Mechanical potentiometer replacement
• Offset and gain control
• Adjustable voltage references and linear regulators

Procurement Notes

Verify the component status as the datasheet revision history indicates changes over time. Confirm that the specific package code T1633+5 corresponds to the 16-pin TQFN-EP footprint required for the design. Ensure the volatile memory characteristic aligns with system power-loss requirements.

Selection Notes

Select this part when a 50kΩ resistance value is required between the high and low terminals. Compare against MAX5391LATE+ (10kΩ) or MAX5391NATE+ (100kΩ) if different resistance values are needed. Verify that the 16-pin TQFN-EP package fits the PCB layout constraints compared to the 14-pin TSSOP option available in the MAX5393 variant.

Part Context

This component belongs to the MAX5391/MAX5393 family of dual digital potentiometers. The MAX5391 variant specifically uses a 16-pin TQFN-EP package, whereas the MAX5393 uses a 14-pin TSSOP package. Both share identical electrical characteristics but differ in physical form factor and pin count.

Replacement Considerations

Direct replacements within the same family include MAX5391LATE+ (10kΩ) and MAX5391NATE+ (100kΩ). For package substitution, the MAX5393MAUD+ offers the same 50kΩ specification in a 14-pin TSSOP package.