MAX5394NATA+T

Overview

The MAX5394NATA+T is a single, volatile, low-voltage linear taper digital potentiometer with 256 taps and an end-to-end resistance of 100kΩ. 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 shutdown mode, and ±1.0 LSB INL accuracy. It is housed in an 8-pin TDFN package and supports an operating temperature range of -40°C to +125°C.

Feature Summary

• Single-channel 256-tap linear taper digital potentiometer with 100kΩ end-to-end resistance
• SPI-compatible 3-wire serial interface for wiper control and configuration
• Internal charge pump enables operation down to 1.7V with terminal voltages up to 5.25V
• User-controlled shutdown modes allow opening H, W, or L terminals independently

Applications

• Portable electronics requiring battery-powered variable resistance
• System calibration circuits needing precise voltage division
• Mechanical potentiometer replacement in industrial systems
• Battery-backed applications utilizing low-power shutdown states

Procurement Notes

Verify the component is the lead-free, RoHS-compliant version indicated by the '+' suffix. Confirm the specific resistance value corresponds to the 'N' suffix (100kΩ), as other variants exist within the family. Ensure the ordering suffix matches the required tape-and-reel packaging format for automated assembly processes.

Selection Notes

Select this variant when a 100kΩ total resistance is required. Note that continuous current limits vary by sub-family; the N-series supports 1mA into terminals compared to higher limits in other versions. Verify if the internal charge pump is necessary for the target supply voltage, as disabling it raises the minimum operating voltage to 2.6V.

Part Context

This component belongs to the MAX5394 family of single-channel digital potentiometers. Other members include the MAX5394LATA+T (10kΩ) and MAX5394MATA+T (50kΩ). All share identical pinouts, interfaces, and electrical characteristics except for the end-to-end resistance value specified by the middle letter in the part number.

Replacement Considerations

Direct substitutes within the same package and interface are the MAX5394LATA+T and MAX5394MATA+T, provided the circuit tolerates their respective 10kΩ and 50kΩ resistances. Cross-family replacements require verification of SPI compatibility and voltage ranges.