ADN2860

The ADN2860 provides dual 512-position and a single 128-position digitally controlled variable resistor¹(VR) in a single4x4mm LFCSP package. This device performs the same electronic adjustment function as a potentiometer, trimmer, orvariable resistor. Each VR offers a completely programmablevalue of resistance between the A terminal and the Wiper or the B terminal and the Wiper. The fixed A-to-B terminal resistance of 25kΩ or 250kΩ has a 1% channel-to-channel matching tolerance and a nominal temperature coefficient of 35ppm/°C.


Wiper position programming, EEPROM reading, and EEPROM writing is conducted via the standard 2-wire I²C interface. Previous/Default wiper position settings can be stored in memory, and refreshed upon system power-up.Additional features of the ADN2860 include preprogrammed linear and logarithmic increment/decrement wiper changing, and actual resistor tolerances are stored in EEPROM so that the actual end-to-end resistance is known, which is valuable for calibration in precision applications.The ADN2860 EEPROM, channel resolution, and package size conforms to GBIC and SFP specifications. The ADN2860 is available in a 4x4mm 24-lead LFCSP package. All parts are guaranteed to operate over the extended industrial temperature range of 40C to 85°C.