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Dual 64-Position Nonvolatile Digital Potentiometer with Buffered Output

The DS3908 features two nonvolatile (NV), low temperature-coefficient, variable digital potentiometers with 64 user-selectable positions.

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • Two 64-Position Linear Taper Potentiometers
  • Integral Wiper Buffering Amplifiers With Selectable Gains of 1V/V, 2V/V, or 4V/V
  • 100kΩ Potentiometer End-to-End Resistance
  • Low Potentiometer Temperature Coefficient
  • Nonvolatile Wiper and Gain Storage
  • I²C-Compatible Interface
  • Write-Protect Pin Prevents Accidental Field Reprogramming
  • 3V to 5.5V Supply Voltage Range
  • -40°C to +85°C Operating Temperature Range
  • 14-Pin TDFN Package

Applications/Uses

  • Cell Phones/PDAs
  • PIN Diode Biasing
  • Portable Electronics
  • Power Supply Calibration

Description

The DS3908 contains two nonvolatile (NV) digital potentiometers with programmable-gain amplifiers buffering the wiper outputs. The potentiometer position and amplifier gain are controlled through an I²C-compatible serial bus. The DS3908 operates in both 3.3V and 5V systems and features a write-protect pin that locks the position of the potentiometers and gain registers. Up to eight DS3908s can be placed on a single I²C bus.

Simplified Block Diagram

DS3908: Typical Operating Circuit DS3908: Typical Operating Circuit Zoom icon

Technical Docs

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 .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.