Datasheet > AD5245BRJZ100-RL71

AD5245BRJZ100-RL71

更新时间： 2022-04-21 16:50:12

品牌	Logo	应用领域
亚德诺 - ADI		数字电位计
页数	文件大小	规格书
20页	687K
描述
256-Position I2C-Compatible Digital Potentiometer

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256-Position I²C^®-Compatible

Digital Potentiometer

AD5245

FUNCTIONAL BLOCK DIAGRAM

FEATURES

256-position

End-to-end resistance 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ

Compact SOT-23-8 (2.9 mm × 3 mm) package

Fast settling time: t_S= 5 µs typ on power-up

Full read/write of wiper register

Power-on preset to midscale

Extra package address decode pin AD0

SCL

I²C INTERFACE

SDA

AD0

WIPER

Computer software replaces µC in factory programming

applications

POR

Single supply: 2.7 V to 5.5 V

GND

Low temperature coefficient 45 ppm/°C

Low power: I_DD= 8 µA

Figure 1.

Wide operating temperature: –40°C to +125°C

Evaluation board available

PIN CONFIGURATION

APPLICATIONS

Mechanical potentiometer replacement in new designs

LCD panel V_COMadjustment

AD5245

TOP VIEW

(Not to Scale)

GND

SCL

AD0

SDA

LCD panel brightness and contrast control

Transducer adjustment of pressure, temperature, position,

chemical, and optical sensors

Figure 2.

RF amplifier biasing

Automotive electronics adjustment

Gain control and offset adjustment

GENERAL DESCRIPTION

The AD5245 provides a compact 2.9 mm × 3 mm packaged

solution for 256-position adjustment applications. These

devices perform the same electronic adjustment function as

mechanical potentiometers or variable resistors, with enhanced

resolution, solid-state reliability, and superior low temperature

coefficient performance.

Operating from a 2.7 V to 5.5 V power supply and consuming

less than 8 µA allows usage in portable battery-operated

applications.

Note that the terms digital potentiometer, VR, and RDAC are

used interchangeably.

The wiper settings are controllable through an I²C-compatible

digital interface, which can also be used to read back the wiper

the same bus. Command bits are available to reset the wiper

position to midscale or to shut down the device into a state of

zero power consumption.

Rev. B

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registeredtrademarks arethe property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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