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128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package

Product Details

Key Features

Parametric specs for Digital Potentiometers
Steps 128
# Potentiometers 1
Control Interface Up/Down
Taper Linear
Wiper Memory Non-Volatile
REND-TO-END (kΩ) 22
Res. Tol. (%) 25
Temp. Coeff. (ppm/°C) (typ) 50
Wiper Resistance (Ω) (typ) 600
ICC @5V (µA) (max) 1.5
Package/Pins UDFN/8
Budgetary
Price (See Notes)
0.94
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Simplified Block Diagram

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Parameters

Parametric specs for Digital Potentiometers
Steps 128
# Potentiometers 1
Control Interface Up/Down
Taper Linear
Wiper Memory Non-Volatile
REND-TO-END (kΩ) 22
Res. Tol. (%) 25
Temp. Coeff. (ppm/°C) (typ) 50
Wiper Resistance (Ω) (typ) 600
ICC @5V (µA) (max) 1.5
Package/Pins UDFN/8
Budgetary
Price (See Notes)
0.94

Key Features

  • Ultra-Small, 2mm x 2mm, 8-Pin µDFN Package
  • Power-On Recall of Wiper Position from Nonvolatile Memory
  • 22kΩ End-to-End Resistance
  • 128 Tap Positions
  • 5ppm/°C Ratiometric Temperature Coefficient
  • 1.5µA (max) Standby Supply Current
  • +2.7V to +5.25V Single Supply Operation
  • 80,000 Wiper Store Cycles
  • 50-Year Wiper Data Retention

Applications/Uses

  • Backlight Adjustment
  • Bias Setting for Radios
  • Fiber-Module Bias Setting
  • LED Bias Adjustment
  • Portable Consumer Electronics
  • Power-Supply Modules
  • VCOM Adjustment for LCD Panels

Description

The MAX5128 nonvolatile, single, linear-taper, digital potentiometer performs the function of a mechanical potentiometer, but replaces the mechanics with a simple 2-wire digital interface. The MAX5128 performs the same function as a discrete potentiometer or variable resistor and features 128 taps and 22kΩ end-to-end resistance. The MAX5128 also features an ultra-small, 2mm x 2mm µDFN package and low 0.5µA (typ) standby supply current, making this device ideal for portable applications. The MAX5128 operates from a +2.7V to +5.25V power supply. An integrated nonvolatile memory recalls the programmed wiper position of the digital potentiometer. A simple 2-wire up/down interface programs the wiper position. The digital potentiometer provides a low 5ppm/°C ratiometric temperature coefficient and is specified over the extended -40°C to +85°C temperature range.

Simplified Block Diagram

MAX5128: Functional Diagram MAX5128: 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 .