ADI AD5282BRUZ20

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.

• 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 preset
• Programmable reset
• Operating temperature: -40°C to +85°C
• I2C-compatible interface

• Multimedia, video, and audio
• Communications
• Mechanical potentiometer replacement
• Instrumentation: gain, offset adjustment
• Programmable voltage source
• Programmable current source
• Line impedance matching