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Analog Devices MAX5400EKA+T — Analog & Data Acquisition

MAX5400EKA+T 50k SPI Digital Potentiometer, 256-Tap

MPNMAX5400EKA+T
End of Life

Maxim Integrated MAX5400EKA+T, SOT-PoT™ series, digital potentiometer, 50kΩ resistance, 256 taps, SPI interface, linear taper, volatile memory, 2.7V–5.5V supply, -40°C to 85°C, SOT-23-8 package.

$3.05Ref. price · indicative, final on quote
PackagingSOT-23-8
RoHSROHS3 Compliant
SeriesSOT-PoT™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

MAX5400EKA+T specifications
ParameterValue
SeriesSOT-PoT™
Memory typeVolatile
MountingSurface Mount
Supply voltage2.7V ~ 5.5V
InterfaceSPI
Operating temperature-40°C ~ 85°C
TaperLinear
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±25%
ConfigurationPotentiometer
Number of taps256
CaseSOT-23-8
Resistance50k
Number of circuits1
Temperature coefficient50ppm/°C
Resistance - wiper (Ohms)250

Product details

The Maxim Integrated MAX5400EKA+T is a single-channel, 50kΩ digital potentiometer with 256 wiper tap positions, controlled via an SPI interface. It belongs to the SOT-PoT™ family and comes in an 8-pin SOT-23 package — a footprint that fits tightly on sensor modules, handheld instruments, or any board where a mechanical trimmer needs replacement by a digitally set divider. The linear taper suits level-setting, gain adjustment, or bias calibration in analog signal chains.

Temperature range and drift

The typical temperature coefficient is 50 ppm/°C.

Sourcing — active, no LTB risk

Frequently asked questions

Is MAX5400EKA+T a direct replacement for MAX5401EKA+T?

Yes, the two parts are pin-compatible and share the same 256-tap SPI interface, 50kΩ resistance, and SOT-23-8 package. The only difference is the power-on wiper position: MAX5400EKA+T defaults to mid-scale (tap 128), while MAX5401EKA+T defaults to zero-scale (tap 0). If your firmware initializes the wiper on boot, they are interchangeable.

Can I use MAX5400EKA+T in a 3.3V system?

Yes. The supply voltage range is 2.7V to 5.5V, so 3.3V operation is within spec. SPI logic levels track the supply rail, so no level translation is needed when the host controller also runs at 3.3V.

Is MAX5400EKA+T volatile or non-volatile?

Volatile. The wiper position is stored in registers that clear on power loss. On each power-up the wiper resets to mid-scale (tap 128). If a fixed startup state is required without firmware intervention, a non-volatile digital pot is the correct choice.

What is the taper of MAX5400EKA+T?

Linear taper. The resistance between the wiper and either end terminal changes linearly with the tap position.