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256-Tap, Nonvolatile, SPI-Interface, Digital Potentiometers

Product Details

Key Features

Parametric specs for Digital Potentiometers
Steps 256
# Potentiometers 1
Control Interface 3-Wire Serial SPI
Taper Linear
Wiper Memory Non-Volatile
REND-TO-END (kΩ) 200
Res. Tol. (%) 25
Temp. Coeff. (ppm/°C) (typ) 50
Wiper Resistance (Ω) (typ) 325
ICC @5V (µA) (max) 1
Package/Pins TDFN/8
Budgetary
Price (See Notes)
1.77
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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 SPI
Taper Linear
Wiper Memory Non-Volatile
REND-TO-END (kΩ) 200
Res. Tol. (%) 25
Temp. Coeff. (ppm/°C) (typ) 50
Wiper Resistance (Ω) (typ) 325
ICC @5V (µA) (max) 1
Package/Pins TDFN/8
Budgetary
Price (See Notes)
1.77

Key Features

  • Wiper Position Stored in Nonvolatile Memory (EEPROM) and Recalled Upon Power-Up or Interface Command
  • 3mm x 3mm x 0.8mm TDFN Package
  • 35ppm/°C End-to-End Resistance Temperature Coefficient
  • 5ppm/°C Ratiometric Temperature Coefficient
  • 50kΩ, 100kΩ, and 200kΩ Resistor Values
  • 5MHz SPI-Compatible Serial Interface
  • 500nA (typ) Static Supply Current
  • Single-Supply Operation: +2.7V to +5.25V
  • 256 Tap Positions
  • ±0.5 LSB DNL in Voltage-Divider Mode
  • ±0.5 LSB INL in Voltage-Divider Mode

Applications/Uses

  • Audio Volume Control
  • Liquid-Crystal Display (LCD) Contrast Control
  • Low-Drift Programmable Filters
  • Low-Drift Programmable-Gain Amplifiers
  • Mechanical Potentiometer Replacements

Description

The MAX5422/MAX5423/MAX5424 nonvolatile, lineartaper, digital potentiometers perform the function of a mechanical potentiometer, but replace the mechanics with a simple 3-wire SPI™-compatible digital interface. Each device performs the same function as a discrete potentiometer or variable resistor and has 256 tap points.

The devices feature an internal, nonvolatile EEPROM used to store the wiper position for initialization during power-up. The 3-wire SPI-compatible serial interface allows communication at data rates up to 5MHz, minimizing board space and reducing interconnection complexity in many applications.

The MAX5422/MAX5423/MAX5424 provide three nominal resistance values: 50kΩ (MAX5422), 100kΩ (MAX5423), or 200kΩ (MAX5424). The nominal resistor temperature coefficient is 35ppm/°C end-to-end and only 5ppm/°C ratiometric. This makes the devices ideal for applications requiring a low-temperature-coefficient variable resistor, such as low-drift, programmable gainamplifier circuit configurations.

The MAX5422/MAX5423/MAX5424 are available in a 3mm x 3mm 8-pin TDFN package, and are specified over the extended -40°C to +85°C temperature range.

Simplified Block Diagram

MAX5422, MAX5423, MAX5424: Functional Diagram MAX5422, MAX5423, MAX5424: Functional Diagram 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 .