AD5246中文资料128 Position I2C Compatible Programmable Resistor in SC70 Package数据手册ADI规格书

描述 Description

The AD5246 provides a compact 2 mm × 2.1 mm packaged solution for 128-position adjustment applications. This device performs the same electronic adjustment function as a variable resistor. Available in four different end-to-end resistance values (5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ), these low temperature coefficient devices are ideal for high accuracy and stability variable resistance adjustments.

The wiper settings are controllable through the I2C compatible digital interface, which can also be used to read back the present wiper register control word. The resistance between the wiper and either end point of the fixed resistor varies linearly with respect to the digital code transferred into the RDAC1 latch.

Operating from a 2.7 V to 5.5 V power supply and consuming 3 μA allows for usage in portable battery-operated applications.

APPLICATIONSMechanical potentiometer replacement in new designsTransducer adjustment of pressure, temperature, position,chemical, and optical sensorsRF amplifier biasingAutomotive electronics adjustmentGain control and offset adjustment

1The terms digital potentiometer, VR, and RDAC are used interchangeably in this document.

特性 Features

• 128 Position

• End-to-End Resistance 5kΩ, 10kΩ , 50kΩ , 100kΩ

• Ultra-Compact SC70-6 (2 mm x 2.1 mm) Package

• I2C Compatible Interface

• Full Read/Write of Wiper Register

• Power-on Preset to Midscale



• Single Supply +2.7 V to +5.5 V

• Low Temperature Coefficient 45 ppm/°C

• Low Power, IDD=3 µA typical

• Wide Operating Temperature –40°C to +125°C

• Evaluation Board Available

• Available in lead-free (Pb-free) package

简介

AD5246属于集成电路（IC）的数字电位计。由制造生产的AD5246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。