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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 k?, 50 k?, or 200 k? 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