256-tap SPI digital pot with wide supply range
The Maxim Integrated MAX5394LATA+T is a single-channel, 10kΩ digital potentiometer with 256 wiper taps controlled via an SPI interface. The linear taper means each step changes resistance by an equal increment — suited for voltage-divider or adjustable-reference applications where the relationship between code and output is linear. The part operates from 1.7V to 5.5V, covering 1.8V logic, 3.3V, and 5V rails without needing an extra supply regulator. The wiper resistance is a typical 25Ω, and the temperature coefficient is 50ppm/°C, keeping the set point stable across temperature.
Package and footprint
Housed in an 8-WFDFN exposed-pad package (8-TDFN-EP, 2x2 mm), the MAX5394LATA+T is a surface-mount device. The exposed pad should be soldered to a PCB thermal land for heat dissipation — the datasheet's recommended footprint is the reference.
Temperature grade and environment
Rated for -40°C to 125°C, this digital pot is suited for industrial control, automotive under-hood, outdoor telecom, and factory-automation environments where the ambient temperature swings beyond commercial limits. The 50ppm/°C tempco and wide supply range make it a candidate for precision bias adjustments or programmable references in those settings.
Lifecycle and sourcing
The MAX5394LATA+T is listed as Active and ROHS3 compliant.
