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PDF ( 数据手册 , 数据表 ) X9319

零件编号 X9319
描述 Digitally Controlled Potentiometer
制造商 Intersil Corporation
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X9319 数据手册, 描述, 功能
®
Data Sheet
September 26, 2006
X9319
FN8185.2
Digitally Controlled Potentiometer
(XDCP)
FEATURES
• Solid-state potentiometer
• 3-wire serial interface
• Terminal voltage, 0 to +10V
• 100 wiper tap points
—Wiper position stored in nonvolatile memory
and recalled on power-up
• 99 resistive elements
—Temperature compensated
—End to end resistance range ±20%
• Low power CMOS
—VCC = 5V
—Active current, 3mA max.
—Standby current, 1mA max.
• High reliability
—Endurance, 100,000 data changes per bit
—Register data retention, 100 years
• RTOTAL value = 10kΩ and 50kΩ
• Packages
—8 Ld SOIC and PDIP
www.DataSheet4U.com Pb-free plus anneal available (RoHS compliant)
APPLICATIONS
• LCD bias control
• DC bias adjustment
• Gain and offset trim
• Laser diode bias control
• Voltage regulator output control
DESCRIPTION
The Intersil X9319 is a digitally controlled potentiometer
(XDCP). The device consists of a resistor array, wiper
switches, a control section, and nonvolatile memory.
The wiper position is controlled by a 3-wire interface.
The potentiometer is implemented by a resistor array
composed of 99 resistive elements and a wiper switch-
ing network. Between each element and at either end
are tap points accessible to the wiper terminal. The
position of the wiper element is controlled by the CS,
U/D, and INC inputs. The position of the wiper can be
stored in nonvolatile memory and then be recalled
upon a subsequent power-up operation.
The device can be used as a three-terminal potentiometer
for voltage control or as a two-terminal variable resistor for
current control in a wide variety of applications.
PIN CONFIGURATION
PDIP/SOIC
INC
U/D
RH
VSS
18
2 X9319 7
36
45
VCC
CS
RL
RW
BLOCK DIAGRAM
VCC (Supply Voltage)
Up/Down
(U/D)
Increment
(INC)
Device Select
(CS)
Control
and
Memory
VSS (Ground)
General
U/D
INC
CS
RH
RW
RL
VVCSSC
Up/Down
Counter
7-Bit
Nonvolatile
Memory
Store and
Recall
Control
Circuitry
99
98
97
One 96
of
One
Hundred
Decoder
2
1
0
Wiper
Switches
Resistor
Array
Detailed
RH
RL
RW
1 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. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.







X9319 pdf, 数据表
X9319
APPLICATIONS INFORMATION
Electronic digitally controlled (XDCP) potentiometers provide three powerful application advantages; (1) the variability
and reliability of a solid-state potentiometer, (2) the flexibility of computer-based digital controls, and (3) the retentivity
of nonvolatile memory used for the storage of multiple potentiometer settings or data.
Basic Configurations of Electronic Potentiometers
VREF
RH
VREF
RW
RL
Three terminal potentiometer;
variable voltage divider
I
Two terminal variable resistor;
variable current
Basic Circuits
Buffered Reference Voltage
R1
+V
+5V
VREF
RW + LMC7101
VOUT
VOUT = VW/RW
Cascading Techniques
+V +V
RW
+V
(a)
X
RW
(b)
Single Supply Inverting Amplifier
R1 R2
VS
+8V
100K
+10V
+
100K
VO
LMC7101
VO = (R2/R1)VS
Voltage Regulator
Offset Voltage Adjustment
VIN 317
VO (REG) VS
R1
R2
R1
100kΩ
+12V
Iadj
R2
10kΩ
+
LMC7101
VO (REG) = 1.25V (1+R2/R1)+Iadj R2
10kΩ
+15V
10kΩ
Comparator with Hysteresis
VS
VO
LT311A
+
VO
R1 R2
VUL = {R1/(R1+R2)} VO(max)
VLL = {R1/(R1+R2)} VO(min)
(for additional circuits see AN115)
8 FN8185.2
September 26, 2006














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