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AD5282BRUZ200-R72 Datasheet(PDF) 1 Page - Analog Devices |
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AD5282BRUZ200-R72 Datasheet(HTML) 1 Page - Analog Devices |
1 / 28 page Single/Dual, +15 V/±5 V, 256-Position, I2C-Compatible Digital Potentiometer AD5280/AD5282 Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Te U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2002–2009 Analog Devices, Inc. All rights reserved. chnology Way, P.O. Box 9106, Norwood, MA 02062-9106, FEATURES AD5280: 1 channel AD5282: 2 channels 256 positions +10 V to +15 V single supply; ±5.5 V dual-supply operation Fixed terminal resistance: 20 kΩ, 50 kΩ, 200 kΩ Low temperature coefficient: 30 ppm/°C Power-on midscale preset1 Programmable reset Operating temperature: −40oC to +85oC I2C-compatible interface APPLICATIONS Multimedia, video, and audio Communications Mechanical potentiometer replacement Instrumentation: gain, offset adjustment Programmable voltage source Programmable current source Line impedance matching GENERAL DESCRIPTION The AD5280/AD5282 are single-channel and dual-channel, 256-position, digitally controlled variable resistors (VRs)2. The devices perform the same electronic adjustment function as a potentiometer, trimmer, or variable resistor. Each VR offers a completely programmable value of resistance between the A terminal and the wiper or the B terminal and the wiper. The fixed A-to-B terminal resistance of 20 kΩ, 50 kΩ, or 200 kΩ has a 1% channel-to-channel matching tolerance. The nominal temperature coefficient of both parts is 30 parts per million/ degrees centigrade (ppm/°C). Another key feature is that the parts can operate up to +15 V or ±5 V. Wiper position programming defaults to midscale at system power-on. When powered, the VR wiper position is programmed by an I2C-compatible, 2-wire serial data interface. The AD5280/ AD5282 feature sleep mode programmability. This allows any level of preset in power-up and is an alternative to a costly EEPROM solution. Both parts have additional programmable logic outputs that enable users to drive digital loads, logic gates, LED drivers, and analog switches in their system. 1 Assert shutdown and program the device during power-up, then deassert the shutdown to achieve the desired preset level. 2 The terms digital potentiometer, VR, and RDAC are used interchangeably. The AD5280/AD5282 are available in thin, surface-mounted 14-lead TSSOP and 16-lead TSSOP. All parts are guaranteed to operate over the extended industrial temperature range of −40°C to +85°C. For 3-wire SPI-compatible interface applica- tions, see the AD5260/AD5262 product information on www.analog.com. FUNCTIONAL BLOCK DIAGRAMS A WB O1 O2 RDAC REGISTER OUTPUT REGISTER SERIAL INPUT REGISTER AD5280 SHDN VDD VSS SDA SCL GND AD0 AD1 ADDRESS CODE PWR ON RESET VL 8 Figure 1. AD5280 A1 W1 B1 O1 RDAC1 REGISTER RDAC2 REGISTER OUTPUT REGISTER SERIAL INPUT REGISTER AD5282 SHDN VDD SDA SCL GND AD0 AD1 A2 W2 B2 ADDRESS CODE PWR ON RESET 8 VDD VSS VL Figure 2. AD5282 |
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