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AD5247BKS50-RL7 데이터시트(PDF) 1 Page - Analog Devices |
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AD5247BKS50-RL7 데이터시트(HTML) 1 Page - Analog Devices |
1 / 20 page 128-Position I2C Compatible Digital Potentiometer AD5247 FEATURES 128-position End-to-end resistance 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ Ultracompact SC70-6 (2 mm × 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 APPLICATIONS Mechanical potentiometer replacement in new designs Rev. 0 Transducer adjustment of pressure, temperature, position, chemical, and optical sensors RF amplifier biasing LCD brightness and contrast adjustment Automotive electronics adjustment Gain control and offset adjustment GENERAL OVERVIEW The AD5247 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 mechanical potentiometer or 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. FUNCTIONAL BLOCK DIAGRAM I2C INTERFACE WIPER REGISTER SCL SDA GND VDD A W B Figure 1. 1 Note: The terms digital potentiometer, VR, and RDAC are used interchangeably in this document. 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 www.analog.com Fax: 781.326.8703 © 2003 Analog Devices, Inc. All rights reserved. |
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