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MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020
SMD = Standard Microcircuit Drawing
Description
The X9428 integrates a digitally controlled potentiometers (XDCP) on a monolithic CMOS integrated microcircuit.
The digitally controlled potentiometer is implemented using 63 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 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 through 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
Solid state potentiometer
2-wire serial interface
Register oriented format
Direct Read/Write/Transfer wiper position
Store as many as four positions per potentiometer
Power supplies
VCC = 2.7V to 5.5V
V+ = 2.7V to 5.5V
V– = -2.7V to -5.5V
Low power CMOS
Standby current < 1μA
Ideal for battery operated applications
High reliability
Endurance–100,000 Data changes per bit per register
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