MAX5394LATA+T

Overview

The MAX5394LATA+T is a single, volatile, low-voltage linear taper digital potentiometer with 256 tap positions. It offers an end-to-end resistance of 10kΩ and operates on a single supply from 1.7V to 5.5V using an internal charge pump. Potentiometer terminals support 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. It is housed in an 8-pin TDFN package and operates over the -40°C to +125°C temperature range.

Feature Summary

• Single-channel digital potentiometer with 256 linear taps and 10kΩ end-to-end resistance
• SPI-compatible serial interface for wiper control and shutdown management
• Internal charge pump enables operation down to 1.7V with terminal voltages up to 5.25V
• Ultra-low supply current (<1μA typical) when charge pump is disabled above 2.6V

Applications

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

Procurement Notes

Verify the component matches the specific 10kΩ resistance variant (L suffix). Confirm the presence of the exposed pad (EP) for thermal grounding during assembly. Ensure the ordering suffix corresponds to the tape-and-reel packaging format required for automated placement processes.

Selection Notes

Select this part for applications requiring SPI control rather than I2C. The L suffix designates the 10kΩ resistance value; choose M or N suffixes for 50kΩ or 100kΩ respectively. Verify that the system voltage supports the 1.7V minimum requirement if the internal charge pump is utilized for extended terminal voltage ranges.

Part Context

This component belongs to the MAX5394 family of single-channel digital potentiometers. It shares functional similarities with the MAX5395 but utilizes an SPI interface instead of I2C. The device is manufactured by Analog Devices Inc./Maxim Integrated and is designed for compact surface-mount applications.

Replacement Considerations

Direct replacements include MAX5394MATA+T (50kΩ) and MAX5394NATA+T (100kΩ). For I2C interface requirements, consider the MAX5395 series. Ensure any substitute maintains the 8-TDFN-EP package footprint and compatible thermal characteristics.