Datasheet > AD5248EVAL

AD5248EVAL

更新时间： 2024-11-15 04:30:39

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	1067K
描述
Dual 256-Position I2C Compatible Digital Potentiometer

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AD5248EVAL 数据手册

Dual 256-Position I²C Compatible

Digital Potentiometer

AD5243/AD5248

FEATURES

2-channel, 256-position

FUNCTIONAL BLOCK DIAGRAMS

End-to-end resistance: 2.5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ

Compact MSOP-10 (3 mm × 4.9 mm) package

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

Full read/write of wiper register

Power-on preset to midscale

WIPER

Extra package address decode pins AD0 and AD1 (AD5248

only)

GND

Computer software replaces µC in factory programming

applications

Single supply: 2.7 V to 5.5 V

AD5243

SDA

SCL

PC INTERFACE

Low temperature coefficient: 35 ppm/°C

Low power: I_DD= 6 µA max

Figure 1. AD5243

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

Evaluation board available

APPLICATIONS

Systems calibrations

RDAC

Electronics level settings

Mechanical Trimmers® replacement in new designs

Permanent factory PCB setting

GND

Transducer adjustment of pressure, temperature, position,

chemical, and optical sensors

AD0

AD1

ADDRESS

DECODE

AD5248

RF amplifier biasing

Automotive electronics adjustment

Gain control and offset adjustment

SDA

SCL

SERIAL INPUT

Figure 2. AD5248

GENERAL DESCRIPTION

The AD5243 and AD5248 provide a compact 3 mm × 4.9 mm

packaged solution for dual 256-position adjustment applica-

tions. These devices perform the same electronic adjustment

function as a 3-terminal mechanical potentiometer (AD5243)

or a 2-terminal variable resistor (AD5248). Available in four

different end-to-end resistance values (2.5 kΩ, 10 kΩ, 50 kΩ,

and 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. The AD5248 has extra package address decode

pins AD0 and AD1, allowing multiple parts to share the same

I²C 2-wire bus on a PCB. The resistance between the wiper and

either endpoint of the fixed resistor varies linearly with respect

to the digital code transferred into the RDAC latch.¹

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

less than 6 µA allows for usage in portable battery-operated

applications.

For applications that program the AD5243/AD5258 at the

factory, Analog Devices offers device programming software

running on Windows® NT/2000/XP operating systems. This

software effectively replaces any external I²C controllers, which

in turn enhances users’ systems time-to-market. An AD5243/

AD5248 evaluation kit and software are available. The kit

includes a cable and instruction manual.

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

Rev. 0

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

registered trademarks are the property of their respective owners.

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

Tel: 781.329.4700

Fax: 781.326.8703

www.analog.com

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