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AD5248BRMZ50 データシート(PDF) 1 Page - Analog Devices |
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AD5248BRMZ50 データシート(HTML) 1 Page - Analog Devices |
1 / 20 page Dual, 256-Position, I2C-Compatible Digital Potentiometers Data Sheet AD5243/AD5248 Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother 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 ©2004–2012 Analog Devices, Inc. All rights reserved. FEATURES 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 Power-on preset to midscale Extra package address decode pins: AD0 and AD1 (AD5248 only) Computer software replaces microcontroller in factory programming applications Single supply: 2.7 V to 5.5 V Low temperature coefficient: 35 ppm/°C Low power: IDD = 6 µA maximum Wide operating temperature: −40°C to +125°C Evaluation board available APPLICATIONS Systems calibrations Electronics level settings Mechanical trimmers replacement in new designs Permanent factory PCB setting Transducer adjustment of pressure, temperature, position, chemical, and optical sensors RF amplifier biasing Automotive electronics adjustment Gain control and offset adjustment FUNCTIONAL BLOCK DIAGRAMS A1 VDD GND SDA SCL W1 WIPER REGISTER 1 PC INTERFACE AD5243 B1 A2 W2 WIPER REGISTER 2 B2 Figure 1. AD5243 VDD GND SDA SCL AD0 AD1 W1 RDAC REGISTER 1 ADDRESS DECODE SERIAL INPUT REGISTER AD5248 B1 W2 RDAC REGISTER 2 B2 / 8 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. |
同様の部品番号 - AD5248BRMZ50 |
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同様の説明 - AD5248BRMZ50 |
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