MAX5427:32-Tap, One-Time Programmable, Linear-Taper Digital Potentiometers

The MAX5427/MAX5428/MAX5429 linear-taper digital potentiometers function as mechanical potentiometers, but replace the mechanics with a simple 2-wire digital interface. These digital potentiometers are unique in that they have an optional one-time programmable feature that either sets the wiper's power-on reset (POR) position to a user-defined value, or the wiper can be set and the interface disabled to prevent further adjustment. The MAX5427 has an end-to-end resistance of 100kΩ, the MAX5428 a resistance of 50kΩ, and the MAX5429 a resistance of 10kΩ. All these devices have 32 wiper positions, operate from a single 2.7V to 5.5V supply, and use less than 1.5µA (max) static supply current. The MAX5427/MAX5428/MAX5429 are available in 8-pin thin QFN and µMAX® packages. Each device is guaranteed over the extended temperature range of -40°C to +85°C.

Key Features
  • Wiper Position Stored After One-Time Fuse Programming
  • User-Defined Power-On Reset Position
  • 35ppm/°C End-to-End Temperature Coefficient and 5ppm/°C Ratiometric Temperature Coefficient
  • 32 Tap Positions
  • Tiny 8-Pin QFN and µMAX Packages
  • Ultra-Low 1.5µA (max) Static Supply Current
  • 2.7V to 5.5V Single-Supply Operation
  • Wiper Position Programmed Through Simple 2-Wire Serial Interface
  • 10kΩ, 50kΩ, and 100kΩ End-to-End Resistances
  • EV Kit Available
MAX5427, MAX5428, MAX5429: Functional Block Diagram
MAX5427, MAX5428, MAX5429: Functional Block Diagram
Applications/Uses
  • Mechanical Potentiometer Replacements
  • Products Using One-Time Factory Calibration
DataSheet
titleDownload file
MAX5427-MAX5429 Data SheetMAX5427-MAX5429.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
MAX5427Linear1Up/DownNon-Volatile OTP3210025351001.5µMAX/8
TDFN-EP/8
$0.79 @1k
MAX542850µMAX/8
TDFN-EP/8
MAX542910µMAX/8
TDFN-EP/8
Design kits & evaluation modules
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX5427ETA+ActiveTDFN-EP,;8 pin;9.6 mm²-40°C to +85°CLead Free
MAX5427ETA+TActiveTDFN-EP,;8 pin;9.6 mm²-40°C to +85°CLead Free
MAX5427ETA-TNo Longer AvailableMAX5427ETA+TTDFN-EP,;8 pin;9.6 mm²-40°C to +85°CNo
MAX5427EUANo Longer AvailableMAX5427EUA+µMAX,;8 pin;15.6 mm²-40°C to +85°CNo
MAX5427EUA+ActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
MAX5427EUA+TActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
MAX5427EUA-TNo Longer AvailableMAX5427EUA+TµMAX,;8 pin;15.6 mm²-40°C to +85°CNo
MAX5427-MAX5429.pdf MAX5429
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
Simple Nonvolatile Gating MAX5527
MAX5427-MAX5429.pdf MAX5429