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X9401WS24I Datasheet(PDF) 1 Page - Intersil Corporation |
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X9401WS24I Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 18 page 1 ® X9401 Low Noise/Low Power/SPI Bus Quad, 64 Tap, Digitally Controlled Potentiometer (XDCP™) Description The X9401 integrates 4 digitally controlled potentiometers (XDCP) on a monolithic CMOS integrated microcircuit. The digitally controlled potentiometer is implemented using 64 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 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. Features • Quad - 4 Separate Pots, 64 Taps/Pot • Nonvolatile Storage of Wiper Position • Four Nonvolatile Data Registers for Each Pot • 16-bytes of EEPROM Memory • SPI Serial Interface •RTOTAL = 10kΩ • Wiper Resistance = 150 Ω Typical • Standby Current < 3µA (Total Package) • Operating Current < 700µA max. •VCC = 2.7V to 5V • 24 Ld SOIC and 24 Ld TSSOP Package • 100 year Data Retention • Pb-Free Available (RoHS Compliant) Block Diagram INTERFACE AND CONTROL CIRCUITRY CS SCK SO A0 A1 R0 R1 R2 R3 WIPER COUNTER REGISTER (WCR) RESISTOR ARRAY POT 1 VH1/RH1 VL1/RL1 R0 R1 R2 R3 WIPER COUNTER REGISTER (WCR) VH0/RH0 VL0/RL0 DATA 8 VW0/RW0 VW1/RW1 R0 R1 R2 R3 RESISTOR ARRAY VH2/RH2 VL2/RL2 VW2/RW2 R0 R1 R2 R3 RESISTOR ARRAY VH3/RH3 VL3/RL3 VW3/RW3 WIPER COUNTER REGISTER (WCR) WIPER COUNTER REGISTER (WCR) POT 3 POT 2 HOLD POT 0 VCC VSS WP SI 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, 2009. All Rights Reserved All other trademarks mentioned are the property of their respective owners. Data Sheet FN8190.4 October 13, 2009 |
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