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X9271TV14 Datasheet(PDF) 1 Page - Intersil Corporation |
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X9271TV14 Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 22 page 1 FN8174.3 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2005, 2011. All Rights Reserved XDCP is a trademark of Intersil Americas Inc. Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. X9271 Single Supply/Low Power/256-Tap/SPI Bus Single, Digitally Controlled (XDCP™) Potentiometer FEATURES • 256 Resistor Taps • SPI Serial Interface for Write, Read, and Transfer Operations of Potentiometer • Wiper Resistance, 100 Ω typical @ VCC = 5V • 16 Nonvolatile Data Registers • Nonvolatile Storage of Multiple Wiper Positions • Power-on Recall; Loads Saved Wiper Position on Power-up • Standby Current < 3µA Max •VCC = 2.7V to 5.5V Operation •50k Ω, 100kΩ Versions of End-to-End Resistance • 100-yr Data Retention • Endurance: 100,000 Data Changes per Bit per Register • 14-Lead TSSOP • Low-power CMOS • Pb-free Plus Anneal Available (RoHS Compliant) DESCRIPTION The X9271 integrates a single, digitally controlled potentiometer (XDCP™) on a monolithic CMOS integrated circuit. The digitally controlled potentiometer is implemented by 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. The potentiometer has associated with it a volatile Wiper Counter Register (WCR) and four nonvolatile data registers that can be directly written to and read by the user. The contents of the WCR control the position of the wiper on the resistor array though the switches. Power-up 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. FUNCTIONAL DIAGRAM 50k Ω and 100kΩ RH RL RW POT VCC VSS SPI Bus Power-on Recall Wiper Counter Register (WCR) Data Registers 16 Bytes Interface Bus Interface and Control Address Data Status Write Read Transfer Inc/Dec Control 256 Taps Data Sheet June 23, 2011 |
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