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EVAL-AD5243SDZ PDF预览

EVAL-AD5243SDZ

更新时间： 2024-09-28 12:53:43
品牌 Logo 应用领域
亚德诺 - ADI 电位器
页数 文件大小 规格书
20页 803K
描述
Dual, 256-Position, I2C-Compatible Digital Potentiometers

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EVAL-AD5243SDZ 数据手册

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Dual, 256-Position, I2C-Compatible  
Digital Potentiometers  
Data Sheet  
AD5243/AD5248  
FEATURES  
FUNCTIONAL BLOCK DIAGRAMS  
A1  
W1  
B1  
A2  
W2  
B2  
2-channel, 256-position potentiometers  
End-to-end resistance: 2.5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ  
Compact 10-lead MSOP (3 mm × 4.9 mm) package  
Fast settling time: tS = 5 µs typical on power-up  
Full read/write of wiper register  
V
DD  
Power-on preset to midscale  
WIPER  
WIPER  
REGISTER 1  
REGISTER 2  
Extra package address decode pins: AD0 and AD1 (AD5248 only)  
Computer software replaces microcontroller in factory  
programming applications  
GND  
AD5243  
Single supply: 2.7 V to 5.5 V  
Low temperature coefficient: 35 ppm/°C  
Low power: IDD = 6 µA maximum  
SDA  
SCL  
PC INTERFACE  
Wide operating temperature: −40°C to +125°C  
Evaluation board available  
Figure 1. AD5243  
W1  
B1  
W2  
B2  
APPLICATIONS  
Systems calibrations  
Electronics level settings  
V
Mechanical trimmers replacement in new designs  
Permanent factory PCB setting  
Transducer adjustment of pressure, temperature, position,  
chemical, and optical sensors  
DD  
RDAC  
REGISTER 1  
RDAC  
REGISTER 2  
GND  
RF amplifier biasing  
Automotive electronics adjustment  
Gain control and offset adjustment  
AD0  
AD1  
ADDRESS  
DECODE  
AD5248  
8
SDA  
SCL  
SERIAL INPUT  
REGISTER  
Figure 2. AD5248  
GENERAL DESCRIPTION  
The AD5243 and AD5248 provide a compact 3 mm × 4.9 mm  
packaged solution for dual, 256-position adjustment applications.  
The AD5243 performs the same electronic adjustment function as  
a 3-terminal mechanical potentiometer, and the AD5248 performs  
the same adjustment function as a 2-terminal variable resistor.  
Available in four 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 the AD5243/AD5248 to be used in portable  
battery-operated applications.  
For applications that program the AD5243/AD5258 at the factory,  
Analog Devices, Inc., offers device programming software running  
on Windows® NT/2000/XP operating systems. This software  
effectively replaces the need for external I2C controllers, which  
in turn enhances the time to market of systems. An AD5243/  
AD5248 evaluation kit and software are available. The kit includes  
a cable and instruction manual.  
1 The terms digital potentiometer, VR, and RDAC are used interchangeably.  
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  
rightsof third parties that may result fromits 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 andregisteredtrademarks 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  
www.analog.com  
Fax: 781.461.3113 ©2004–2012 Analog Devices, Inc. All rights reserved.  
 
 
 
 
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