GENERAL DESCRIPTION

The AD5241/AD5242 provide a single-/dual-channel, 256-position, digitally controlled variable resistor (VR) device. 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. For the AD5242, the fixed A-to-B terminal resistance of 10 kΩ, 100 kΩ, or 1 MΩ has a 1 channel-to-channel matching tolerance. The nominal temperature coefficient of both parts is 30 ppm/°C.

FEATURES

256 positions

10 kΩ, 100 kΩ, 1 MΩ

Low temperature coefficient: 30 ppm/°C

Internal power on midscale preset

Single-supply 2.7 V to 5.5 V or dual-supply ±2.7 V for ac or

bipolar operation

I2C-compatible interface with readback capability

Extra programmable logic outputs

Self-contained shutdown feature

Extended temperature range: −40°C to +105°C

APPLICATIONS

Multimedia, video, and audio

Communications

Mechanical potentiometer replacement

Instrumentation: gain, offset adjustment

Programmable voltage-to-current conversion

Line impedance matching

AD5242属于集成电路（IC） > 数字电位计。亚德诺半导体技术有限公司制造生产的AD5242数字电位计数字电位器是一系列集成电路器件，可提供类似于传统机械电位器或变阻器的可调节电阻，但通过电子信号而非机械输入来进行控制。虽然这些器件的电阻可耗散的电能相对有限，但其电子控制能力有助于小型化、自动化和远程控制信号级模拟电路，而这些电路本来可能会使用机械电位器。