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

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

Product Details

Key Features

Parametric specs for Digital Potentiometers
Steps 256
# Potentiometers 1
Control Interface 3-Wire Serial
Taper Linear
Wiper Memory Volatile
REND-TO-END (kΩ) 50
Res. Tol. (%) 25
Temp. Coeff. (ppm/°C) (typ) 50
Wiper Resistance (Ω) (typ) 250
ICC @5V (µA) (max) 5
Package/Pins SOT23/8
Budgetary
Price (See Notes)
1.22
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Simplified Block Diagram

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Parameters

Parametric specs for Digital Potentiometers
Steps 256
# Potentiometers 1
Control Interface 3-Wire Serial
Taper Linear
Wiper Memory Volatile
REND-TO-END (kΩ) 50
Res. Tol. (%) 25
Temp. Coeff. (ppm/°C) (typ) 50
Wiper Resistance (Ω) (typ) 250
ICC @5V (µA) (max) 5
Package/Pins SOT23/8
Budgetary
Price (See Notes)
1.22

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

Applications/Uses

  • Adjustable Voltage Reference
  • Low-Drift Programmable-Gain Amplifiers
  • Mechanical Potentiometer Replacements

Description

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).

Simplified Block Diagram

MAX5400, MAX5401: Functional Diagram MAX5400, MAX5401: Functional Diagram Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .