GENERAL DESCRIPTION
The AD5280/AD5282 provides a single-/dual-channel, 256-position digitally controlled variable resistor (VR) device.1 These devices perform 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 20 kΩ, 50 kΩ, or 200 kΩ has a 1% channel-to-channel matching tolerance. Nominal temperature coefficient of both parts is 30 ppm/°C. Another key feature of these parts is that they can operate up to +15 V or ±5 V.

FEATURES
  256 Position
  AD5280: 1-Channel
  AD5282: 2-Channel (Independently Programmable)
  Potentiometer Replacement
  20 kΩ, 50 kΩ, 200 kΩ
  Low Temperature Coefficient 30 ppm/°C
  Internal Power-On Midscale Preset
  5 V to 15 V Single-Supply; ±5.5 V Dual-Supply Operation
  I2C Compatible Interface

APPLICATIONS
  Multimedia, Video, and Audio
  Communications
  Mechanical Potentiometer Replacement
  Instrumentation: Gain, Offset Adjustment
  Programmable Voltage Source
  Programmable Current Source
  Line Impedance Matching