MAX5401:256-Tap SOT-PoT, Low-Drift Digital Potentiometers in SOT23

256-Tap Digital Potentiometers Offer the Ultimate Space Savings in an 8-Pin SOT23

The MAX5400/MAX5401 digital potentiometers offer 256-tap SOT-PoT™ digitally controlled variable resistors in tiny 8-pin SOT23 packages. Each device functions as a mechanical potentiometer, consisting of a fixed resistor string with a digitally controlled wiper contact. They operate from +2.7V to +5.5V single-supply voltages and use an ultra-low supply current of 0.1µA. These devices also provide glitchless switching between resistor taps, as well as a convenient power-on reset that sets the wiper to the midscale position at power-up. A low 5ppm/°C ratiometric temperature coefficient makes it ideal for applications requiring low drift. The MAX5400/MAX5401 serve well in applications requiring digitally controlled resistors, including adjustable voltage references and programmable gain amplifiers (PGAs). A nominal end-to-end resistor temperature coefficient of 50ppm/°C allows these parts to be used as variable resistors in applications such as low-tempco adjustable gain and other circuit configurations. Two resistance values are available: 50kΩ (MAX5400) and 100kΩ (MAX5401). Each device is guaranteed over the extended industrial temperature range (-40°C to +85°C).

Key Features
  • Miniature 8-Pin SOT23 (3mm x 3mm)
  • 256 Tap Positions
  • Ultra-Low 0.1µA Supply Current
  • Single-Supply Operation: +2.7V to +5.5V
  • Low Ratiometric Temperature Coefficient: 5ppm/°C
  • Power-On Reset: Wiper Goes to Midscale (Position 128)
  • Glitchless Switching Between the Resistor Taps
  • 3-Wire SPI™-Interface Compatible
  • 50kΩ/100kΩ Resistor Values
MAX5400, MAX5401: Functional Diagram
MAX5400, MAX5401: Functional Diagram
Applications/Uses
  • Adjustable Voltage Reference
  • Low-Drift Programmable-Gain Amplifiers
  • Mechanical Potentiometer Replacements
DataSheet
titleDownload file
MAX5400-MAX5401 Data SheetMAX5400-MAX5401.pdf
Parametrics
Part NumberTaperPOTsControl InterfaceWiper MemoryStepsREND-TO-END
(kΩ)
Res. Tol.
(%)
Temp. Coeff.
(ppm/°C)
Wiper Resistance
(Ω)
ICC @5V
(µA)
Package/PinsBudgetary
Price
typtypmaxSee Notes
MAX5400Linear13-Wire SerialVolatile2565025502505SOT/8$1.08 @1k
MAX5401100SOT/8
Related Products
  • MAX5160:Low-Power Digital Potentiometers
  • MAX5161:Low-Power Digital Potentiometers
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX5401EKA+ActiveSOT,;8 pin;9 mm²-40°C to +85°CLead Free
MAX5401EKA+TActiveSOT,;8 pin;9 mm²-40°C to +85°CLead Free
MAX5401EKA-TActiveSOT,;8 pin;9 mm²-40°C to +85°CNo
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