MAX5422:256-Tap, Nonvolatile, SPI-Interface, Digital Potentiometers

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.

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
MAX5422, MAX5423, MAX5424: Functional Diagram
MAX5422, MAX5423, MAX5424: Functional Diagram
Applications/Uses
  • Audio Volume Control
  • Liquid-Crystal Display (LCD) Contrast Control
  • Low-Drift Programmable Filters
  • Low-Drift Programmable-Gain Amplifiers
  • Mechanical Potentiometer Replacements
DataSheet
titleDownload file
MAX5422-MAX5424 Data SheetMAX5422-MAX5424.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
MAX5422Linear13-Wire Serial SPINon-Volatile2565025503251TDFN-EP/8$1.51 @1k
MAX5423100TDFN-EP/8
MAX5424200TDFN-EP/8
Design kits & evaluation modules
Quality and Environmental Data
Related Products
  • MAX5478:Dual, 256-Tap, Nonvolatile, I²C-Interface, Digital Potentiometers
  • MAX5479:Dual, 256-Tap, Nonvolatile, I²C-Interface, Digital Potentiometers
  • MAX5477:Dual, 256-Tap, Nonvolatile, I²C-Interface, Digital Potentiometers
  • MAX5417:256-Tap, Nonvolatile, I²C-Interface, Digital Potentiometers
  • MAX5418:256-Tap, Nonvolatile, I²C-Interface, Digital Potentiometers
  • MAX5419:256-Tap, Nonvolatile, I²C-Interface, Digital Potentiometers
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX5422ETANo Longer AvailableMAX5422ETA+TDFN-EP,;8 pin;9.6 mm²-40°C to +85°CNo
MAX5422ETA+ActiveTDFN-EP,;8 pin;9.6 mm²-40°C to +85°CLead Free
MAX5422ETA+TActiveTDFN-EP,;8 pin;9.6 mm²-40°C to +85°CLead Free
MAX5422ETA-TNo Longer AvailableMAX5422ETA+TTDFN-EP,;8 pin;9.6 mm²-40°C to +85°CNo
MAX5422-MAX5424.pdf MAX5424
When Is Calibration Important? MAX5529
Reduce the Chances of Human Error: Part 2, Super Amps and Filters for Analog Interface MAX5492
Introduction to Electronic Calibration and Methods for Correcting Manufacturing Tolerances in Medical Equipment Designs MAX5481
MAX5422.pdf MAX5422
MAX5422-MAX5424.pdf MAX5424