Features and Benefits
- AD5280: 1 channel
- AD5282: 2 channels
- 256 positions
- +10 V to +15 V single supply;
±5.5 V dual-supply operation
- 20 kΩ, 50 kΩ, 200 kΩ fixed terminal resistance
- Low temperature coefficient: 30 ppm/°C
- Power-on midscale preset1
- Programmable reset
- Operating temperature: −40°C to +85°C
- I2C-compatible interface
The AD5280 / AD5282 are single-channel and dual-channel, 256-position, digitally controlled variable resistors (VRs). 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.
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 applications, see the AD5260 / AD5262 product information on www.analog.com
- Multimedia, video, and audio
- Mechanical potentiometer replacement
- Instrumentation: gain, offset adjustment
- Programmable voltage source
- Programmable current source
- Line impedance matching
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
The Evaluation board for the AD5282 contains a parallel connection and software allowing the AD5282 to be controlled from a PC.
Documentation & Resources
AN-686: Implementing an I2C® Reset (Rev. 0)12/16/200344 kB
AN-582: Resolution Enhancements of Digital Potentiometers with Multiple Devices10/2/2002135 kB
AN-580: Programmable Oscillator Uses Digital Potentiometers (Rev. 0)10/2/200252 kB
Choosing the Correct digiPOT for Your Application6/7/2013311 K
Software & Systems Requirements
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
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