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ADN2860:  3-CHANNEL DIGITAL POTENTIOMETER WITH NONVOLATILE MEMORY

The ADN2860 provides dual 512-position and single 128-position, digitally controlled variable resistors1 (VR) in a single 4 mm × 4 mm LFCSP package. This device performs the same electronic adjustment function as a potentiometer, trimmer, or variable resistor. Each VR offers a completely programmable value of resistance between the A terminal and the wiper, or the B terminal and the ...More

ADN2860:  3-CHANNEL DIGITAL POTENTIOMETER WITH NONVOLATILE MEMORY

Product Description

The ADN2860 provides dual 512-position and single 128-position, digitally controlled variable resistors1 (VR) in a single 4 mm × 4 mm LFCSP package. This device performs the same electronic adjustment function as a potentiometer, trimmer, or variable resistor. Each VR offers a completely programmable value of resistance between the A terminal and the wiper, or the B terminal and the wiper. The fixed A-to-B terminal resistance of 25 kΩ or 250 kΩ has a 1% channel-to-channel matching tolerance and a nominal temperature coefficient of 35 ppm/°C.

Wiper position programming, EEPROM2 reading, and EEPROM writing are conducted via the standard 2-wire I2C interface. Previous default wiper position settings can be stored in memory, and refreshed upon system power-up.

Additional features of the ADN2860 include preprogrammed linear and logarithmic increment/decrement wiper changing. The actual resistor tolerances are stored in EEPROM so that the actual end-to-end resistance is known, which is valuable for calibration in precision applications.

The ADN2860 EEPROM, channel resolution, and package size conform to GBIC and SFP specifications. The ADN2860 is available in a 4 mm × 4 mm, 24-lead LFCSP package. All parts are guaranteed to operate over the extended industrial tempera-ture range −40°C to +85°C.

1 The terms programmable resistor, variable resistor, RDAC, and digital potentiometer are used interchangeably.
2 The terms nonvolatile memory, EEMEM, and EEPROM are used interchangeably.

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  • 3 channels
    Dual 512-position
    Single 128-position
  • 25 kΩ or 250 kΩ full-scale resistance
  • Low temperature coefficient
    Potentiometer divider 15 ppm/°C
    Rheostat mode 35 ppm/°C
  • Nonvolatile memory retains wiper settings
  • Permanent memory write protection
  • Linear increment/decrement
  • ±6 dB increment/decrement
  • I2C-compatible serial interface
  • See data sheet for additional features
  • # Channels: 3
  • # Positions: 512
  • Memory Type: Non-Volatile
  • Interface: I2C
  • Resistor Values (kOhms): 25, 250
  • Bipolar Voltage Range (V): ±2.75V
  • Supply Current : 10µA
  • Temp. Range -40 °C to..: 85Deg
  • Absolute Tempco (ppm/°C): 15ppm/C
  • Package: LFCSP

ADN2860 Functional Block Diagram

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For detailed drawings and chemical composition please consult our  Package Site

Pin Count
Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

Temperature Range
This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
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*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.