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32-Tap, Nonvolatile, I²C, Linear, Digital Potentiometers

32-Tap, Nonvolatile, I²C, Linear-Taper, Digital Potentiometers Perform the Function of a Mechanical Potentiometer, but Replace the Mechanics with a Simple 2-Wire Serial Interface

Product Details

Key Features

Parametric specs for Digital Potentiometers
Steps 32
# Potentiometers 1
Control Interface 2-Wire Serial
Taper Linear
Wiper Memory Non-Volatile
REND-TO-END (kΩ) 100
Res. Tol. (%) 25
Temp. Coeff. (ppm/°C) (typ) 35
Wiper Resistance (Ω) (typ) 610
ICC @5V (µA) (max) 2
Package/Pins TDFN/8
Budgetary
Price (See Notes)
0.85
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Simplified Block Diagram

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Parameters

Parametric specs for Digital Potentiometers
Steps 32
# Potentiometers 1
Control Interface 2-Wire Serial
Taper Linear
Wiper Memory Non-Volatile
REND-TO-END (kΩ) 100
Res. Tol. (%) 25
Temp. Coeff. (ppm/°C) (typ) 35
Wiper Resistance (Ω) (typ) 610
ICC @5V (µA) (max) 2
Package/Pins TDFN/8
Budgetary
Price (See Notes)
0.85

Key Features

  • Tiny 3mm x 3mm 8-Pin TDFN and 6-Pin Thin SOT23 Packages
  • Power-On Recall of Wiper Position from Nonvolatile Memory
  • 35ppm/°C End-to-End Resistance Temperature Coefficient
  • 5ppm/°C Ratiometric Temperature Coefficient
  • 50kΩ/100kΩ Resistor Values
  • Fast 400kbps I²C-Compatible Serial Interface
  • 500nA (typ) Static Supply Current
  • +2.7V to +5.25V Single-Supply Operation
  • 32 Tap Positions
  • ±0.15 LSB INL (typ), ±0.15 LSB DNL (typ)

Applications/Uses

  • Liquid-Crystal Display (LCD) Screen Adjustment
  • Low-Drift Programmable-Gain Amplifiers
  • Mechanical Potentiometer Replacements
  • Volume Control

Description

The MAX5432–MAX5435 nonvolatile, linear-taper, digital potentiometers perform the function of a mechanical potentiometer, but replace the mechanics with a simple 2-wire serial interface. Each device performs the same function as a discrete potentiometer or a variable resistor and has 32 tap points.

The MAX5432–MAX5435 feature an internal, nonvolatile, electrically erasable programmable read-only memory (EEPROM) that returns the wiper to its previously stored position at power-up. The fast-mode I²C-compatible serial interface allows communication at data rates up to 400kbps, minimizing board space and reducing interconnection complexity. Each device is available with multiple factory-preset I²C addresses (see the Ordering Information/Selector Guide in the full data sheet).

Use the MAX5432–MAX5435 in applications requiring digitally controlled resistors. Two resistance values are available (50kΩ and 100kΩ) in a voltage-divider or variable resistor configuration. The nominal resistor temperature coefficient is 35ppm/°C end-to-end, and only 5ppm/°C ratiometric, making the devices ideal for applications requiring a low-temperature-coefficient variable resistor such as low-drift, programmable-gain amplifier circuit configurations.

The MAX5432/MAX5433 are available in a 3mm x 3mm 8-pin TDFN package and the MAX5434/MAX5435 are available in a 6-pin thin SOT23 package. The MAX5432–MAX5435 are specified over the extended (-40°C to +85°C) temperature range.

Simplified Block Diagram

MAX5432, MAX5433, MAX5434, MAX5435: Typical Operating Circuit MAX5432, MAX5433, MAX5434, MAX5435: Typical Operating Circuit Zoom icon

Technical Docs

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 .