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/ AD5282BRU50 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/AD5282BRU50 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
Feature
- 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
Applications
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.
Data Sheet, Rev. C, 7/09
(Picture: Pinout)
