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AD5245BRJ100-R2 データシート(PDF) 1 Page - Analog Devices |
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AD5245BRJ100-R2 データシート(HTML) 1 Page - Analog Devices |
1 / 20 page 256-Position I2C®-Compatible Digital Potentiometer AD5245 Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. 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 ©2006 Analog Devices, Inc. All rights reserved. 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: tS = 5 µs typ on power-up Full read/write of wiper register Power-on preset to midscale Extra package address decode pin AD0 Computer software replaces µC in factory programming applications Single supply: 2.7 V to 5.5 V Low temperature coefficient 45 ppm/°C Low power: IDD = 8 µA Wide operating temperature: –40°C to +125°C Evaluation board available APPLICATIONS Mechanical potentiometer replacement in new designs LCD panel VCOM adjustment LCD panel brightness and contrast control Transducer adjustment of pressure, temperature, position, chemical, and optical sensors RF amplifier biasing Automotive electronics adjustment Gain control and offset adjustment FUNCTIONAL BLOCK DIAGRAM I2C INTERFACE WIPER REGISTER SCL SDA AD0 GND VDD A W B POR Figure 1. PIN CONFIGURATION A B AD0 SDA 1 2 3 4 5 8 7 6 W VDD GND SCL AD5245 TOP VIEW (Not to Scale) Figure 2. 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. 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. 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. |
同様の部品番号 - AD5245BRJ100-R2 |
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同様の説明 - AD5245BRJ100-R2 |
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