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AD5245EVAL

更新时间: 2024-11-22 22:18:07
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
16页 853K
描述
256-Position I2C Compatible Digital Potentiometer

AD5245EVAL 数据手册

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256-Position I2C Compatible  
Digital Potentiometer  
AD5245  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
V
DD  
256-position  
End-to-end resistance 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ  
Compact SOT-23-8 (2.9 mm × 3 mm) package  
I2C® compatible interface  
Extra package address decode pin AD0  
Full read/write of wiper register  
Power-on preset to midscale  
A
SCL  
2
I C INTERFACE  
SDA  
AD0  
W
B
WIPER  
REGISTER  
Single supply 2.7 V to 5.5 V  
Low temperature coefficient 45 ppm/°C  
Low power, IDD = 8 µA  
GND  
Wide operating temperature –40°C to +125°C  
Evaluation board available  
Figure 1.  
PIN CONFIGURATION  
APPLICATIONS  
Mechanical potentiometer replacement in new designs  
Transducer adjustment of pressure, temperature, position,  
chemical, and optical sensors  
1
2
3
4
W
8
7
6
5
A
B
AD0  
SDA  
V
AD5245  
DD  
GND  
SCL  
TOP VIEW  
(Not to Scale)  
RF amplifier biasing  
Automotive electronics adjustment  
Gain control and offset adjustment  
Figure 2.  
GENERAL OVERVIEW  
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.  
The wiper settings are controllable through an I2C compatible  
digital interface, which can also be used to read back the wiper  
register content. AD0 can be used to place up to two devices on  
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.  
Note:  
The terms digital potentiometer, VR, and RDAC are used interchangeably.  
Purchase of licensed I2C components of Analog Devices or one of its sublicensed  
Associated Companies conveys a license for the purchaser under the Philips I2C  
Patent Rights to use these components in an I2C system, provided that the system  
conforms to the I2C Standard Specification as defined by Philips.  
Operating from a 2.7 V to 5.5 V power supply and consuming  
less than 5 µA allows for usage in portable battery-operated  
applications.  
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 companies.  
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  
© 2003 Analog Devices, Inc. All rights reserved.  

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