DS3906:Triple NV Low Step Size Variable Resistor Plus Memory

The DS3906 is intended for low resistance, small step-size applications. It contains three nonvolatile (NV), low-temperature coefficient, variable digital resistors that are capable of ohm and subohm increments when used in parallel with a fixed external resistor. All three of the DS3906's resistors have 64 positions (plus a high-Z state) with a pseudo-log response cleverly chosen to have a linear equivalent resistance when paired with an external resistor (see graphs below). The DS3906 also contains 16 bytes of user EEPROM that, in addition to the resistors, are controlled through an I²C-compatible serial interface. Three address pins allow up to eight DS3906s to be placed on the same I²C bus. The DS3906 can also be factory cutomized to provide a variety of transfer functions depending on user requirements. Contact var name = "mixedsignal.apps@"; var domain = "maximintegrated.com"; document.write ("" + name + domain + ""); for additional information.

Key Features
  • Three Programmable Resistors for Low Step-Size Applications (Ohm and Subohm)
  • Resistor Settings are NV
  • 16-Byte NV User Memory (EEPROM)
  • I²C-Compatible Serial Interface
  • Up to 8 Devices Can be Multidropped on the Same I²C Bus
  • Low Power Consumption
  • Wide Operating Voltage (2.7V to 5.5V)
  • Operating Temperature Range: -40°C to +85°C
DS3906: Typical Application Circuit
DS3906: Typical Application Circuit
Applications/Uses
  • Low Ohm, Fine Resolution Driver Control for LED Display Panels
  • Low Ohm, Fine Resolution Instrumentation Control
DataSheet
titleDownload file
DS3906 Data SheetDS3906.pdf
Parametrics
Part NumberTaperPOTsControl InterfaceWiper MemoryStepsRes. Tol.
(%)
Temp. Coeff.
(ppm/°C)
ICC @5V
(µA)
Package/PinsBudgetary
Price
typmaxSee Notes
DS3906Pseudo-Log32-WireNon-Volatile642060160µMAX/10$1.12 @1k
Quality and Environmental Data
Related Products
  • DS2432:1Kb Protected 1-Wire EEPROM with SHA-1 Engine
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
DS3906UNo Longer AvailableDS3906U+µMAX,;10 pin;15.4 mm²-40°C to +85°CNo
DS3906U+ActiveµMAX,;10 pin;15.4 mm²-40°C to +85°CLead Free
DS3906U+T&RActiveµMAX,;10 pin;15.4 mm²-40°C to +85°CLead Free
DS3906U/T&RNo Longer AvailableDS3906U+T&RµMAX,;10 pin;15.4 mm²-40°C to +85°CNo
DS3906.pdf DS3906
DS3906_cn.pdf DS3906
DS3906.pdf DS3906
DS3906.pdf DS3906
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DS3906.pdf DS3906
DS3906_cn.pdf DS3906