AD5282
Single/Dual, +15 V/±5 V, 256-Position, I2C-Compatible Digital Potentiometer
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Overview
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
Product Details
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
APPLICATIONS
- Multimedia, video, and audio
- Communications
- Mechanical potentiometer replacement
- Instrumentation: gain, offset adjustment
- Programmable voltage source
- Programmable current source
- Line impedance matching
Product Categories
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)
Documentation & Resources
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AN-686: Implementing an I2C® Reset (Rev. 0)12/16/2003PDF44 kB
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AN-582: Resolution Enhancements of Digital Potentiometers with Multiple Devices10/2/2002PDF135 kB
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AN-580: Programmable Oscillator Uses Digital Potentiometers (Rev. 0)10/2/2002PDF52 kB
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FAQs7/26/2017
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Choosing the Correct digiPOT for Your Application6/7/2013PDF311 K
Software & Systems Requirements
Device Drivers
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