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X9420WS Datasheet(PDF) 1 Page - Xicor Inc. |
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X9420WS Datasheet(HTML) 1 Page - Xicor Inc. |
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1 / 20 page  Characteristics subject to change without notice. 1 of 20 REV 1.1.6 7/30/02 www.xicor.com X9420 Single Digitally Controlled (XDCP) Potentiometer FEATURES • Solid-State Potentiometer • SPI serial interface • Register oriented format —Direct read/write/transfer wiper positions —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 • High reliability —Endurance–100,000 data changes per bit per register —Register data retention–100 years • 8-bytes of nonvolatile EEPROM memory • 10K Ω or 2.5KΩ resistor arrays • Resolution: 64 taps each pot • 14-lead TSSOP, 16-lead SOIC, and 16-pin plastic DIP packages DESCRIPTION The X9420 integrates a single 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 SPI bus interface. The 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. BLOCK DIAGRAM R0 R1 R2 R3 Wiper Counter Register (WCR) Interface and Control Circuitry HOLD CS SI A0 VH/RH VL/RL Data 8 VW/RW SCK S0 Low Noise/Low Power/SPI Bus APPLICATION NOTES AVAILABLE AN99 • AN115 • AN120 • AN124 • AN133 • AN134 • AN135 |
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Similar Description - X9420WS |
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