MAXIM MAX5128 128-Tap Nonvolatile Linear-Taper Digital Potentiometer in 2mm x 2mm μDFN Package
Summary
The MAX5128 is an advanced, ultra-small (2mm x 2mm) digital potentiometer that electronically replaces traditional mechanical potentiometers. It offers a nonvolatile, linear-taper resistance of 128 taps, ensuring wiper position recall upon power-up in applications like display bias control. This technical manual serves as a complete guide for engineers and product designers, providing detailed electrical specifications, operating range (-40°C to +85°C), reliable interfacing instructions, and integration guidelines necessary for incorporating the device into portable or embedded electronics.
Page 1 Text Content
19-3929; Rev 2; 6/07
EVALUATION KIT AVAILABLE
128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package General Description Features
The MAX5128 nonvolatile, single, linear-taper, digital Ultra-Small, 2mm x 2mm, 8-Pin µDFN Package potentiometer performs the function of a mechanical
Power-On Recall of Wiper Position from
potentiometer, but replaces the mechanics with a sim-
ple 2-wire digital interface. The MAX5128 performs the Nonvolatile Memory
same function as a discrete potentiometer or variable
22kΩ End-to-End Resistance
resistor and features 128 taps and 22kΩ end-to-end
resistance. The MAX5128 also features an ultra-small, 128 Tap Positions
2mm x 2mm µDFN package and low 0.5µA (typ) stand-
5ppm/°C Ratiometric Temperature Coefficient
by supply current, making this device ideal for portable
applications. The MAX5128 operates from a +2.7V to 1.5µA (max) Standby Supply Current
+5.25V power supply. An integrated nonvolatile memo-
+2.7V to +5.25V Single Supply Operation
ry recalls the programmed wiper position of the digital
potentiometer. A simple 2-wire up/down interface pro- 80,000 Wiper Store Cycles
grams the wiper position. The digital potentiometer pro-
50-Year Wiper Data Retention
vides a low 5ppm/°C ratiometric temperature coefficient and is specified over the extended -40°C to +85°C tem- perature range.
Applications Ordering Information
VCOM Adjustment for LCD Panels
TEMP PIN - PKG
Backlight Adjustment RANGE PA C K A G E MARK CODE LED Bias Adjustment M AX 5128E LA+ -40°C to +85°C 8 µDFN AAF L822-1
Power-Supply Modules +Denotes a lead-free package.
Fiber-Module Bias Setting Bias Setting for Radios Portable Consumer Electronics
Functional Diagram
7-BIT NV MEMORY 128-POSITION
GND DECODER
UP SERIAL
INTERFACE
MAX5128
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Page Summary Contents For MAXIM MAX5128 128-Tap Nonvolatile Linear-Taper Digital Potentiometer in 2mm x 2mm μDFN Package
Manual Details
| Brand | Linear |
|---|---|
| Pages | 14 |
| File Size | 308.32 KB |
| Published | July 22, 2026 |
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Frequently Asked Questions
What advantage does this device have over mechanical potentiometers?
It replaces physical mechanics with nonvolatile memory to recall the wiper position.
What is the accepted operating voltage range?
The MAX5128 can operate from a single supply power of +2.7V up to +5.25V.
Can I rely on the pot's setting if the power goes off?
Yes, it features nonvolatile memory that recalls the programmed wiper position.
What is the specified operating temperature range?
The device maintains performance measurements over an extended range of -40°C to +85°C.