MAX5394MATA+T

Overview

The MAX5394MATA+T is a single, volatile, low-voltage linear taper digital potentiometer with 256 tap positions and a 50kΩ end-to-end resistance. It operates on a single supply from 1.7V to 5.5V using an internal charge pump, allowing H, W, and L terminals to handle voltages up to 5.25V independent of VDD. The device features an SPI serial interface, ultra-low quiescent current (<1μA in low-power mode), and ±1.0 LSB INL accuracy. Packaged in an 8-pin TDFN (2mm x 2mm) with an exposed pad, it supports an operating temperature range of -40°C to +125°C.

Feature Summary

• Single-channel digital potentiometer with 256 taps and 50kΩ nominal resistance
• Internal charge pump enables operation down to 1.7V with terminal voltages up to 5.25V
• SPI-compatible 3-wire serial interface for wiper control and shutdown modes
• Ultra-low supply current (<1μA typical) when the charge pump is disabled

Applications

• Portable electronics requiring battery backup
• System calibration circuits
• Mechanical potentiometer replacement
• Battery-powered industrial applications

Procurement Notes

Verify the component is lead-free and RoHS-compliant as indicated by the '+' suffix. Confirm the package type is the 8-pin TDFN-EP (2mm x 2mm). Ensure the specific resistance value matches the 'M' suffix designation of 50kΩ. Check that the data sheet revision corresponds to Rev 3 or later for accurate electrical characteristics.

Selection Notes

Select this part for designs requiring voltage-independent terminal operation at low supply voltages. The 'M' suffix specifies the 50kΩ resistance variant; use 'L' for 10kΩ or 'N' for 100kΩ if different values are needed. Consider disabling the charge pump to achieve <1μA current consumption if the supply voltage remains above 2.6V.

Part Context

This component belongs to the MAX5394 family of single, 256-tap digital potentiometers. The MAX5394LATA+T offers 10kΩ resistance, while the MAX5394NATA+T provides 100kΩ. All variants share the same 8-pin TDFN package, SPI interface, and functional architecture, differing primarily in their end-to-end resistance values.

Replacement Considerations

Direct pin-compatible replacements within the same series include the MAX5394LATA+T (10kΩ) and MAX5394NATA+T (100kΩ). Verify that the alternative resistance value meets the circuit requirements before substitution.