AD5258

PRODUCTION

Nonvolatile, I2C®-Compatible 64-Position, Digital Potentiometer

Data Sheet (Rev. D) Product Selection Table
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Overview

  • Nonvolatile memory maintains wiper settings 
  • 64-position digital potentiometer 
  • Compact MSOP-10 (3 mm × 4.9 mm) 
  • I2C-compatible interface
  • VLOGIC pin provides increased interface flexibility 
  • End-to-end resistance 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ
  • Resistance tolerance stored in EEPROM (0.1% accuracy)
  • Power-on EEPROM refresh time <1 ms
  • Software write protect command 
  • Address Decode Pin AD0 and Address Decode Pin AD1 allow four packages per bus 
  • 100-year typical data retention at 55°C 
  • Wide operating temperature
    −40°C to +85°C 

The AD5258 provides a compact, nonvolatile 3 mm × 4.9 mm packaged solution for 64-position adjustment applications. These devices perform the same electronic adjustment function as mechanical potentiometers or variable resistors, but with enhanced resolution and solid-state reliability.

The wiper settings are controllable through an I2C-compatible digital interface that is also used to read back the wiper register and EEPROM content in addition, resistor tolerance is stored within EEPROM, providing an end-to-end tolerance accuracy of 0.1%. There is also a software write protection function that ensures data cannot be written to the EEPROM register.

A separate VLOGIC pin delivers increased interface flexibility. For users who need multiple parts on one bus, Address Bit AD0 and Address Bit AD1 allow up to four devices on the same bus.

APPLICATIONS

  • LCD panel VCOM adjustment
  • LCD panel brightness and contrast control
  • Mechanical potentiometer replacement in new designs
  • Programmable power supplies
  • RF amplifier biasing
  • Automotive electronics adjustment
  • Gain control and offset adjustment
  • Fiber to the home systems
  • Electronics level settings
AD5258
Nonvolatile, I2C®-Compatible 64-Position, Digital Potentiometer
AD5258 Functional Block Diagram AD5258 Pin Configuration
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Documentation

Data Sheet 1

User Guide 1

Technical Articles 2

Frequently Asked Question 1

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Software Resources

Device Drivers 1

Evaluation Kits

eval board
schematic 1
EVAL-AD5258

AD5258 Evaluation Board

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Features and Benefits

  • Full-featured in conjunction with low voltage digiPOT motherboard (EVAL-MB-LV-SDZ)
  • Various test circuits
  • Various ac/dc input signals
  • PC control via a separately purchased system demonstration platform (SDP-B or SDP-S)
  • PC software for control

Product Details

The AD5258 supports single-supply 2.7 V to 5.5 V operation, making the device suited for battery-powered applications and many other applications with superior low temperature coefficient performance.

In addition, the AD5258 uses a versatile I2C serial interface that operates in fast mode, allowing speeds of up to 400 kHz. This interface can be used to read back the wiper register and EEPROM content.

The EVAL-MB-LV-SDZ can operate in single-supply mode and incorporates an internal power supply from the USB.

Complete specifications for the AD5258 part can be found in the AD5258 data sheet.
EVAL-AD5258
AD5258 Evaluation Board
EVAL-AD5258DBZ

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