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)
Description
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.
Parameters
| Attributes | Value |
|---|---|
| Resistance Taper | Linear |
| Taps (#) | 256 |
| Resistance Options (kΩ) | 50, 100 |
| Channels (#) | 4 |
| Interface | 2-Wire |
| Memory Type | Nonvolatile |
| Supply Voltage Vcc Range | 2.7 to 5.5 |
| Supply Current Icc (µA) | 5 |
| Dual Supply Range (V) | -2.7 to 5.5 |
| Wiper Current (mA) | 7.5 |
| Wiper Resistance (ohms) | 40 |
| VL Terminal Voltage (Min) (V) | -5.5 |
| VL Terminal Voltage (Max) (V) | 5.5 |
| End-to-End Temperature Coefficient (ppm/°C) | 300 |
| Middlepoint Ratiometric Tempco | 20 |
| Qualification Level | Standard |