X9269| Datasheet

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IGNS D ES EW U C T OR N D ED F T E PR O D M E N S TI TU Data Sheet OM SUB 5820 R EC NOT SSIBLE X9 PO

X9269
Single Supply/Low Power/256-Tap/2-Wire Bus
April 17, 2007 FN8173.4

Dual Digitally-Controlled (XDCPTM) Potentiometers
FEATURES Dual Two Separate Potentiometers 256 Resistor Taps/Pot 0.4% Resolution 2-Wire Serial Interface for Write, Read, and Transfer Operations of the Potentiometer Single Supply Device Wiper Resistance, 100 Typical VCC = 5V 4 Nonvolatile Data Registers for Each Potentiometer Nonvolatile Storage of Multiple Wiper Positions Power-on Recall. Loads Saved Wiper Position on Power-up. Standby Current < 5uA Max 50k, 100k Versions of End to End Pot Resistance 100 yr. Data Retention Endurance: 100,000 Data Changes per Bit per Register 24-Lead SOIC, 24-Lead TSSOP Low Power CMOS Power Supply VCC = 2.7V to 5.5V Pb-Free Plus Anneal Available (RoHS Compliant) FUNCTIONAL DIAGRAM

DESCRIPTION The X9269 integrates 2 digitally controlled potentiometer (XDCP) on a monolithic CMOS integrated circuit. The digital 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 a four nonvolatile Data Registers 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. Powerup recalls the contents of the default Data Register (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.

VCC

RH0

RH1

2-Wire Bus Interface

Address Data Status

Bus Interface and Control

Write Read Transfer Inc/Dec

Power-on Recall Wiper Counter Registers (WCR)

Control

Data Registers (DR0 DR3)

VSS

RW0

RL0

RW1

RL1

50k or 100k versions

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005, 2006, 2007. All Rights Reserved All other trademarks mentioned are the property of their respective owners.