器件名称: X9448WP24I-2.7
功能描述: Mixed Signal with 2-Wire Interface
文件大小: 312.46KB 共19页
简 介:PO S
T UCT RO D RODUC P E P T E E OL UT OBS UBSTIT Data Sheet S 8 1 E X9 4 SI B L
X9448
Mixed Signal with 2-Wire Interface
April 18, 2005 FN8201.0
Dual Digitally Controlled Potentiometer (XDCP) & Voltage Comparator
FEATURES Two digitally controlled potentiometers and two voltage comparators in one package 2-wire serial interface Register oriented format —Direct read/write wiper position —Store as many as four positions per pot Fast response comparator Enable, latch, or shutdown comparator outputs through ACR Auto-recall of WCR and ACR data from R0 Hardware write protection, WP Separate analog and digital/system supplies Direct write cell —Endurance–100,000 data changes per bit per register —Register data retention–100 years 16-bytes of EEPROM memory Power saving feature and low noise Two 10k or two 2.5k potentiometers Resolution: 64 taps each pot 24-lead TSSOP and 24-lead SOIC packages BLOCK DIAGRAM
DESCRIPTION The X9448 integrates two nonvolatile digitally controlled potentiometers (XDCP) and two voltage comparators on a CMOS monolithic microcircuit. The X9448 contains two resistor arrays, each composed of 63 resistive elements. Between each element and at either end are tap points accessible to the wiper elements. The position of the wiper element on the array is controlled by the user through the two wire serial bus interface. Each potentiometer has an associated voltage comparator. The comparator compares the external input voltage VNI with the wiper v……
