DS3902:Dual, NV, Variable Resistors with User EEPROM

The DS3902 features a dual, nonvolatile (NV), low temperature-coefficient, variable digital resistor with 256 user-selectable positions. The DS3902 can operate over a wide supply range of 2.4V to 5.5V, and communication with the device is achieved through an I²C compatible serial interface. Internal address settings allow the DS3902 slave address to be programmed to one of 128 possible addresses. The low cost and the small size of the DS3902 make it an ideal replacement for conventional mechanical-trimming resistors.

Key Features
  • Dual 256-Position Linear Digital Resistors
  • Available as 50kΩ/30kΩ or 50kΩ/15kΩ
  • Resistor Settings Stored in NV Memory
  • Low Temperature Coefficient
  • I²C-Compatible Serial Interface
  • Wide Operating Voltage (2.4V to 5.5V)
  • Software Write Protection
  • User-EEPROM Memory
  • Programmable Slave Address
  • Operating Temperature Range: -40°C to +95°C
  • Small 8-Pin µSOP Package
DS3902: Typical Operating Circuit
DS3902: Typical Operating Circuit
Applications/Uses
  • Audio Power-Amp Biasing
  • Instrumentation and Industrial Controls
  • Optical Transceivers
  • Optical Transponders
  • Replacement for Mechanical Variable Resistors and Dip Switches
  • RF Power Amps
DataSheet
titleDownload file
DS3902 Data SheetDS3902.pdf
Parametrics
Part NumberTaperPOTsControl InterfaceWiper MemoryStepsREND-TO-END
(kΩ)
Res. Tol.
(%)
Temp. Coeff.
(ppm/°C)
Wiper Resistance
(Ω)
ICC @5V
(µA)
Package/PinsBudgetary
Price
typtypmaxSee Notes
DS3902Linear22-Wire AddressableNon-Volatile25650 + (30 or 15)20300160200µMAX/8$0.94 @1k
Quality and Environmental Data
Ordering Information
Part NumberNotesStatusRecommended ReplacementPackageTempRoHS
DS3902U-515+15k/50kohmsActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
DS3902U-530+30k/50kohmsActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
DS3902.pdf DS3902
DS3902_cn.pdf DS3902
DS3902.pdf DS3902
DS3902.pdf DS3902
Side-by-Side Comparison of Fiber-Monitoring and Control ICs DS3902
Using DS3902 in Low Cost Optical Modules DS3902
DS3902.pdf DS3902
DS3902_cn.pdf DS3902