X9258US24IZ-2.7

The X9258 integrates 4 digitally controlled potentiometers (XDCP™) on a monolithic CMOS integrated circuit. The digitally controlled potentiometer is implemented using 255 resistive elements in a series array. Between each element are tap points connected to the wiper terminal through switches. The position of the wiper on the array is controlled by the user through the 2-wire bus interface. Each potentiometer has associated with it a volatile Wiper Counter Register (WCR) and 4 non-volatile Data Registers (DR0:DR3) that can be directly written to and read by the user. The contents of the WCR controls the position of the wiper on the resistor array though the switches. Power-up recalls the contents of DR0 to the WCR. The XDCP™ can be used as a three-terminal potentiometer or as a two-terminal variable resistor in a wide variety of applications including control, parameter adjustments, and signal processing.

Key Features

• Four potentiometers in one package
• 256 resistor taps/potentiometer: 0.4% resolution
• 2-wire serial interface
• Wiper resistance, 40Ω typical @ V+ = 5V, V- = -5V
• Four nonvolatile data registers for each potentiometer
• Nonvolatile storage of wiper position
• Standby current <5µA max (total package)
• Power supplies
• VCC = 2.7V to 5.5V
• V+ = 2.7V to 5.5V
• V- = -2.7V to -5.5V
• 100kΩ, 50kΩ total potentiometer resistance
• High reliability
• Endurance: 100,000 data changes per bit per register
• Register data retention: 100 years
• 24 Ld SOIC, 24 Ld TSSOP
• Dual supply version of X9259
• Pb-free (RoHS compliant)