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

AD5282屬于集成電路（IC） > 數(shù)字電位計(jì)。亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD5282數(shù)字電位計(jì)數(shù)字電位器是一系列集成電路器件，可提供類似于傳統(tǒng)機(jī)械電位器或變阻器的可調(diào)節(jié)電阻，但通過電子信號(hào)而非機(jī)械輸入來進(jìn)行控制。雖然這些器件的電阻可耗散的電能相對(duì)有限，但其電子控制能力有助于小型化、自動(dòng)化和遠(yuǎn)程控制信號(hào)級(jí)模擬電路，而這些電路本來可能會(huì)使用機(jī)械電位器。