256-tap linear digipot with I²C bus addressing
The MAX5395LATA+T is a single-channel digital potentiometer from Analog Devices, configured as a linear taper with 256 wiper tap positions across a 10 kΩ end-to-end resistance. Each step resolves to roughly 39 Ω, giving a fine-grained analog adjustment under digital control. The I²C interface supports a selectable address, so multiple MAX5395 devices share the same two-wire bus without address conflicts — useful when calibrating several channels from one microcontroller.
Package and board-fit constraints
Housed in an 8-WFDFN exposed-pad package measuring 2 mm × 2 mm (8-TDFN-EP), the MAX5395LATA+T demands a fine-pitch layout. Supplied in Tape & Reel (TR) or Cut Tape (CT) format, the part is compatible with standard pick-and-place assembly.
Wiper resistance and temperature drift
The wiper resistance is typically 25 Ω, which adds a small series offset at the output — negligible for a 10 kΩ divider but worth accounting for in a precision voltage reference or gain-setting application where the wiper forms part of the feedback network. Temperature coefficient is 50 ppm/°C typical, meaning the resistance drifts about 0.5 Ω per °C over the 10 kΩ element. For a calibration trim that stays within a fixed ambient, this drift is invisible; for an outdoor sensor bridge that sees a 60°C swing, budget roughly 30 Ω of end-to-end shift.
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