參數(shù)資料
型號(hào)： x9440
元件分類： 數(shù)字電位計(jì)
英文描述： Dual Digitally-Controlled (EEPOT) Potentiometer & Voltage Comparator(雙數(shù)控電位器和電壓比較器)
中文描述： 雙數(shù)字控制（EEPOT）電位
文件頁(yè)數(shù)： 1/22頁(yè)
文件大?。?/td> 146K
代理商： X9440
REV 1.0 2/27/01
Characteristics subject to change without notice.
1 of 22
www.xicor.com
X9440
Dual Digitally Controlled Potentiometer (XDCP
) & Voltage Comparator
FEATURES
Two digitally controlled potentiometers and two
voltage comparators in one package
SPI 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 the 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
Resolution: 64 taps each pot
24-lead TSSOP and 24-Lead SOIC packages
potentiometers
DESCRIPTION
The X9440 integrates two non volatile digitally con-
trolled potentiometers (XDCP) and two voltage com-
parators on a CMOS monolithic microcircuit.
The X9440 contains two resistor arrays, each com-
posed 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 SPI serial
bus interface.
Each potentiometer has an associated voltage com-
parator. The comparator compares the external input
voltage V
NI
with the wiper voltage V
put voltage level to a logic high or low.
W
and sets the out-
Each resistor array and comparator has associated
with it a wiper counter register (WCR), analog control
register (ACR), and eight 6 bit data registers that can
be directly written and read by the user. The contents
of the wiper counter register controls the position of
the wiper on the resistor array. The contents of the
analog control register controls the comparator and its
output. The potentiometer is programmed with a SPI
serial interface.
BLOCK DIAGRAM
V
OUT (0,1)
(R
0
-R
3
)
0,1
Interface
and
Control
Circuitry
SCK
S0
SI
A0
A1
CS
HOLD
V
H (0,1)
V
L (0,1)
WP
V
W (0,1)
V
NI (0,1)
+
–
WCR
0,1
(R
0
-R
3
)
0,1
ACR
0,1
Mixed Signal with SPI Interface
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
X9440WP24 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Mixed Signal with SPI Interface
X9440WP242.7 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Interface IC
X9440WP24-2.7 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Mixed Signal with SPI Interface
X9440WP24I 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Mixed Signal with SPI Interface
X9440WP24I2.7 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Interface IC
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