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DS3908
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.


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Data Sheet
FULL DATA SHEET (PDF, 224kB)
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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.

Key Features   Applications/Uses
  • 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

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

    Evaluation Kits
    none

    Design Guides
  • Audio (PDF)
  • Digital Potentiometers (PDF)

    Reliability Reports
  • Reliability Report: DS3908.pdf

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-3 of 3

    DS3908 Free
    Sample
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    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    DS3908N+T&R  
    TDFN;14 pin;
    Dwg: 21-0137 (PDF)
    Use pkgcode/variation: T1433+1*
    -40°C to +85°C See data sheet
    Materials Analysis
    DS3908N-001  
    THIN QFN (Dual);14 pin;
    Dwg: 21-0137 (PDF)
    Use pkgcode/variation: T1433-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS3908N-001+  
    TDFN;14 pin;
    Dwg: 21-0137 (PDF)
    Use pkgcode/variation: T1433+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
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    Related Products
    DS3902 Dual, NV, Variable Resistors with User EEPROM
    MAX5820 Dual, 8-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC

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    2006-04-01
    This page last modified: 2008-07-15



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