X9250

Features:

• Four potentiometers in one package
• 256 resistor taps/pot0.4% resolution
• SPI serial interface
• Wiper resistance, 40 typical @ V_CC = 5V
• Four nonvolatile data registers for each pot
• Nonvolatile storage of wiper position
• Standby current < 5A max (total package)
• Power supplies
-VCC = 2.7V to 5.5V
-V+ = 2.7V to 5.5V
-V = -2.7V to -5.5V
• 100K, 50K total pot resistance
• High reliability
-Endurance 100,000 data changes per bit per register
-Register data retention 100 years
• 24-lead SOIC, 24-lead TSSOP, 24-lead CSP (Chip Scale Package)
• Dual supply version of X9251




Pinout






Specifications

Temperature under bias..................... 65 to +135°C
Storage temperature.......................... 65 to +150°C
Voltage on SCK, SCL or any address input
with respect to VSS................................. 1V to +7V
Voltage on V+ (referenced to V_SS) .........................10V
Voltage on V- (referenced to V_SS) ........................ -10V
(V+) (V-) ..............................................................12V
Any V_H/R_H .................................................................V+
Any V_L/R_L .............................................................VLead
temperature (soldering, 10 seconds) ................ 300°C
I_W (10 seconds) ................................................±15mA




Description

The X9250 integrates 4 digitally controlled potentiometers (XDCP) on a monolithic CMOS integrated circuit. The X9250 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 SPI bus interface. Each X9250 potentiometer has associated with it a volatile Wiper Counter Register (WCR) and 4 nonvolatile 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.