X9319WP8I [XICOR]
Digitally Controlled Potentiometer (XDCP); 数控电位器（ XDCP ）
| 型号： | X9319WP8I |
| 厂家： | 
XICOR INC. |
| 描述： | Digitally Controlled Potentiometer (XDCP) |
| 文件： | 总10页 (文件大小：345K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Digitally Controlled Potentiometer (XDCP™)
X9319
FEATURES
DESCRIPTION
• Solid-state potentiometer
• 3-wire serial interface
• Terminal voltage, 0 to +10V
• 100 wiper tap points
The Xicor 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.
—Wiper position stored in nonvolatile memory
and recalled on power-up
• 99 resistive elements
—Temperature compensated
—End to end resistance range ꢀ0ꢁ
• Low power CMOS
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.
—V = 5V
CC
—Active current, 3mA max.
—Standby current, 1mA max.
• High reliability
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.
—Endurance, 100,000 data changes per bit
—Register data retention, 100 years
• R
• Packages
value = 10KΩ and 50KΩ
TOTAL
—8-lead SOIC and DIP
APPLICATIONS
• LCD bias control
• DC bias adjustment
• Gain and offset trim
• Laser diode bias control
• Voltage regulator output control
BLOCK DIAGRAM
U/D
INC
CS
R
99
H
Up/Down
Counter
V
(Supply Voltage)
CC
98
97
96
R
R
Up/Down
H
(U/D)
7-Bit
Nonvolatile
Memory
One
of
Control
and
Memory
Increment
(INC)
W
One
Wiper
Switches
Resistor
Array
Hundred
Decoder
Device Select
(CS)
R
L
2
Store and
Recall
Control
Circuitry
V
(Ground)
SS
1
0
V
V
CC
SS
General
R
R
L
W
Detailed
XDCP is a trademark of Xicor, Inc.
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X9319
PIN CONFIGURATION
DIP/SOIC
X9319
V
INC
U/D
1
2
3
4
8
7
6
5
CC
CS
R
L
R
H
V
R
SS
W
ORDERING INFO
Ordering
Operating Temperature
Range
Number
X9319WS8
X9319WS8I
X9319WP8
X9319WP8I
X9319US8
X9319US8I
X9319UP8
X9319UP8I
RTOTAL
Package
10KΩ
10KΩ
10KΩ
10KΩ
50KΩ
50KΩ
50KΩ
50KΩ
8-lead SOIC
0°C to 70°C
-40°C to +85°C
0°C to 70°C
8-lead SOIC
8-lead Plastic DIP
8-lead Plastic DIP
8-lead SOIC
-40°C to +85°C
0°C to 70°C
8-lead SOIC
-40°C to +85°C
0°C to 70°C
8-lead Plastic DIP
8-lead Plastic DIP
-40°C to +85°C
PIN DESCRIPTIONS
DIP/
SOIC
Symbol
Brief Description
1
2
3
4
5
6
7
INC
Increment. Toggling INC while CS is low moves the wiper either up or down.
Up/Down. The U/D input controls the direction of the wiper movement.
The high terminal is equivalent to one of the fixed terminals of a mechanical potentiometer.
Ground.
U/D
R
H
V
SS
RW
The wiper terminal is equivalent to the movable terminal of a mechanical potentiometer.
The low terminal is equivalent to one of the fixed terminals of a mechanical potentiometer.
R
L
CS
Chip Select. The device is selected when the CS input is LOW, and de-selected when CS is
high.
8
V
Supply Voltage.
CC
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X9319
ABSOLUTE MAXIMUM RATINGS
COMMENT
Junction Temperature under bias ......–65°C to +135°C
Stresses above those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device.
This is a stress rating only; functional operation of the
device (at these or any other conditions above those
listed in the operational sections of this specification) is
not implied. Exposure to absolute maximum rating con-
ditions for extended periods may affect device reliability.
Storage temperature .........................–65°C to +150°C
Voltage on CS, INC, U/D and V
CC
with respect to V .................................–1V to +7V
SS
R , R , R to ground.......................................... +12V
H
W
L
Lead temperature (soldering 10 seconds)..........300°C
(10 seconds) ................................................. 6mA
I
W
POTENTIOMETER CHARACTERISTICS
(V
= 5V 10ꢀ, T = Full Operating Temperature Range unless otherwise stated)
CC
A
Limits
Symbol
Parameter
End to end resistance tolerance
Min. Typ.(4) Max.
Unit
Test Conditions/Notes
-20
+20
ꢀ
See ordering information
for values
V
/
R /R terminal voltage
V
10
25
V
mW
Ω
V
= 0V
SS
RH RL
H
L
SS
Power rating
R
I
Wiper resistance
Wiper current(5)
Noise(7)
40
200
+3.0
I
= 1mA
W
W
-3.0
mA
See test circuit
Ref: 1kHz
W
-120
1
dBV
Resolution
ꢀ
Absolute linearity(1)
Relative linearity(2)
-1
+1
MI(3)
MI(3)
ppm/°C
ppm/°C
pF
V(RH) = 10V,
V(RL) = 0V
-0.2
+0.2
R
temperature coefficient(5)
300
TOTAL
Ratiometric temperature coefficient(5),(6)
Potentiometer capacitances
Supply Voltage
-20
4.5
+20
5.5
(5)
C /C /C
W
10/10/25
See equivalent circuit
H
L
V
V
CC
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X9319
D.C. OPERATING CHARACTERISTICS
(V
= 5V 10ꢀ, T = Full Operating Temperature Range unless otherwise stated)
CC
A
Limits
(4)
Symbol
Parameter
Min. Typ.
Max.
Unit
Test Conditions
CS = V , U/D = V or V and
I
V
CC
active current (Increment)
1
3
mA
CC
IL
IL
IH
INC = 0.4V/2.4V @ min. t
R , R , R not connected
CYC
L
H
W
I
Standby supply current
300
1000
+10
µA
µA
CS ≥ 2.4V, U/D and INC = 0.4V
SB
R , R , R not connected
L
H
W
I
CS, INC, U/D input leakage
current
-10
V
= V to V
SS CC
LI
IN
V
CS, INC, U/D input HIGH voltage
CS, INC, U/D input LOW voltage
CS, INC, U/D input capacitance
2
V
+ 1
CC
V
V
IH
V
–1
0.8
10
IL
(5)
C
pF
V
= 5V, V = V , T = 25°C,
IN
CC
IN
SS
A
f = 1MHz
ENDURANCE AND DATA RETENTION
(V = 5V 10ꢀ, T = Full Operating Temperature Range)
CC
A
Parameter
Minimum endurance
Data retention
Min.
Unit
100,000
100
Data changes per bit
Years
Notes: (1) Absolute linearity is utilized to determine actual wiper voltage versus expected voltage = [V(R
)–V(R
)]/MI
W(n)(expected)
W(n)(actual)
V(R
) = n(V(R )-V(R ))/99 + V(R ), with n from 0 to 99.
W(n)(expected)
H L L
(2) Relative linearity is a measure of the error in step size between taps = [V(R
)–(V(R ) – MI)]/MI
W(n)
W(n+1)
(3) 1 Ml = Minimum Increment = [V(R )–V(R )]/99.
H
L
(4) Typical values are for T = 25°C and nominal supply voltage.
A
(5) Guaranteed by device characterization.
(6) Ratiometric temperature coefficient = (V(R
and n from 0 to 99.
)
–V(R )
)/[V(R )
(T1–T2) x 106], with T1 & T2 being 2 temperatures,
W T1(n)
W T1(n)
W T2(n)
(7) Measured with wiper at tap position 31, R grounded, using test circuit.
L
Test Circuit
Equivalent Circuit
R
TOTAL
Test Point
R
L
R
H
C
L
C
W
C
H
10pF
R
W
Force
Current
25pF
10pF
R
W
A.C. CONDITIONS OF TEST
Input pulse levels
0.8V to 2.0V
Input rise and fall times
Input reference levels
10ns
1.4V
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X9319
A.C. OPERATING CHARACTERISTICS
(V
= 5V 10ꢀ, T = Full Operating Temperature Range unless otherwise stated)
CC
A
Limits
(4)
Typ.
Symbol
Parameter
Min.
100
100
1
Max.
Unit
ns
t
CS to INC setup
Cl
(5)
t
INC HIGH to U/D change
U/D to INC setup
ns
lD
DI
(5)
t
µs
t
INC LOW period
1
µs
lL
t
t
INC HIGH period
1
µs
lH
lC
INC inactive to CS inactive
CS deselect time (STORE)
CS deselect time (NO STORE)
1
µs
t
20
1
ms
µs
CPHS
(5)
t
CPHNS
(5)
t
INC to R change
W
100
500
µs
IW
t
INC cycle time
4
µs
CYC
(5)
t
t
INC input rise and fall time
Power up to wiper stable
500
500
50
µs
,
R
F
(5)
t
µs
PU
(5)
CC
t V
V
CC
power-up rate
0.2
V/ms
R
POWER UP AND DOWN REQUIREMENTS
In order to prevent unwanted tap position changes, or an inadvertant store, bring the CS and INC high before or
concurrently with the V pin on powerup. The potentiometer voltages must be applied after this sequence is com-
CC
pleted. During power-up, the data sheet parameters for the DCP do not fully apply until 1 millisecond after V
CC
reaches its final value.The V ramp spec is always in effect.
CC
A.C. TIMING
CS
t
CYC
t
CPHNS
t
t
t
t
t
CPHS
CI
IL
IH
IC
90ꢀ 90ꢀ
10ꢀ
INC
U/D
t
t
t
t
R
ID
DI
F
t
IW
(3)
MI
R
W
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X9319
PIN DESCRIPTIONS
R and R
PIN NAMES
Symbol
Description
High terminal
H
L
The high (R ) and low (R ) terminals of the X9319 are
H
L
R
H
equivalent to the fixed terminals of a mechanical
potentiometer. The terminology of R and R refer-
ences the relative position of the terminal in relation to
wiper movement direction selected by the U/D input
and not the voltage potential on the terminal.
R
W
Wiper terminal
L
H
R
L
Low terminal
V
Ground
SS
CC
V
Supply voltage
RW
U/D
INC
CS
Up/Down control input
Increment control input
Chip select control input
R is the wiper terminal and is equivalent to the mov-
w
able terminal of a mechanical potentiometer. The posi-
tion of the wiper within the array is determined by the
control inputs. The wiper terminal series resistance is
typically 40Ω.
PRINCIPLES OF OPERATION
There are three sections of the X9319: the control
section, the nonvolatile memory, and the resistor array.
The control section operates just like an up/down
counter. The output of this counter is decoded to turn
on a single electronic switch connecting a point on the
resistor array to the wiper output. The contents of the
counter can be stored in nonvolatile memory and
retained for future use. The resistor array is comprised
of 99 individual resistors connected in series.
Electronic switches at either end of the array and
between each resistor provide an electrical connection
Up/Down (U/D)
The U/D input controls the direction of the wiper move-
ment and whether the counter is incremented or decre-
mented.
Increment (INC)
The INC input is negative-edge triggered. Toggling INC
will move the wiper and either increment or decrement
the counter in the direction indicated by the logic level
on the U/D input.
to the wiper pin, R .
Chip Select (CS)
W
The device is selected when the CS input is LOW. The
current counter value is stored in nonvolatile memory
when CS is returned HIGH while the INC input is also
HIGH. After the store operation is complete the X9319
will be placed in the low power standby mode until the
device is selected once again.
The wiper acts like its mechanical equivalent and does
not move beyond the first or last position. That is, the
counter does not wrap around when clocked to either
extreme.
The electronic switches on the device operate in a
“make before break” mode when the wiper changes
tap positions. If the wiper is moved several positions,
PIN CONFIGURATION
multiple taps are connected to the wiper for t (INC to
IW
V
change). The R
value for the device can tem-
W
TOTAL
DIP/SOIC
porarily be reduced by a significant amount if the wiper
is moved several positions.
V
INC
U/D
1
2
3
4
8
7
6
5
CC
When the device is powered-down, the last wiper posi-
tion stored will be maintained in the nonvolatile mem-
ory. When power is restored, the contents of the
memory are recalled and the wiper is set to the value
last stored.
CS
X9319
R
L
R
H
V
R
SS
W
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X9319
INSTRUCTIONS AND PROGRAMMING
MODE SELECTION
The INC, U/D and CS inputs control the movement of
the wiper along the resistor array. With CS set LOW the
device is selected and enabled to respond to the U/D
and INC inputs. HIGH to LOW transitions on INC will
increment or decrement (depending on the state of the
U/D input) the seven bit counter. The output of this
counter is decoded to select one of one hundred wiper
positions along the resistive array.
CS
L
INC
U/D
H
Mode
Wiper up
L
L
Wiper down
Store wiper position to
nonvolatile memory
H
X
H
X
L
L
X
X
H
Standby
No store, return to standby
The value of the counter is stored in nonvolatile mem-
ory whenever CS transitions HIGH while the INC input
is also HIGH.
Wiper Up (not recommended)
Wiper Down
(not recommended)
L
L
The system may select the X9319, move the wiper and
deselect the device without having to store the latest
wiper position in nonvolatile memory. After the wiper
movement is performed as described above and once
the new position is reached, the system must keep INC
LOW while taking CS HIGH. The new wiper position
will be maintained until changed by the system or until
a powerup/down cycle recalled the previously stored
data. This procedure allows the system to always
power-up to a preset value stored in nonvolatile mem-
ory; then during system operation minor adjustments
could be made. The adjustments might be based on
user preference, system parameter changes due to
temperature drift, etc.
The state of U/D may be changed while CS remains
LOW. This allows the host system to enable the device
and then move the wiper up and down until the proper
trim is attained.
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X9319
APPLICATIONS INFORMATION
Electronic digitally controlled (XDCP) potentiometers provide three powerful application advantages; (1) the vari-
ability 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
V
V
REF
REF
R
H
R
W
R
L
I
Three terminal potentiometer;
variable voltage divider
Two terminal variable resistor;
variable current
Basic Circuits
Single Supply Inverting Amplifier
+8V
Buffered Reference Voltage
Cascading Techniques
+V +V
R
1
+V
R
R
2
1
+5V
LMC7101
V
S
R
W
+
–
V
REF
X
V
OUT
R
W
–
+
100K
V
O
+V
+10V
LMC7101
100K
R
V
= V /R
W W
W
OUT
(a)
(b)
V = (R2/R1)V
O S
Voltage Regulator
Offset Voltage Adjustment
Comparator with Hysteresis
R
R
2
1
LT311A
V
V (REG)
O
317
IN
V
V
–
+
S
S
V
+12V
O
R
1
100KΩ
–
+
V
O
I
adj
R
2
LMC7101
10KΩ
10KΩ
+15V
R
R
1
2
10KΩ
V
V
= {R /(R +R )} V (max)
1 1 2 O
UL
LL
V
(REG) = 1.25V (1+R /R )+I
R
adj 2
= {R /(R +R )} V (min)
O
2
1
1 1 2 O
(for additional circuits see AN115)
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X9319
PACKAGING INFORMATION
8-Lead Plastic Small Outline Package, Type S (8-lead SOIC)
0.150 (3.80) 0.228 (5.80)
0.158 (4.00) 0.244 (6.20)
Pin 1 Index
Pin 1
0.014 (0.35)
0.019 (0.49)
0.188 (4.78)
0.197 (5.00)
(4X) 7°
0.053 (1.35)
0.069 (1.75)
0.004 (0.19)
0.010 (0.25)
0.050 (1.27)
0.010 (0.25)
0.020 (0.50)
0.050"Typical
X 45°
0.050"
Typical
0° - 8°
0.0075 (0.19)
0.010 (0.25)
0.250"
0.016 (0.410)
0.037 (0.937)
0.030"
Typical
8 Places
FOOTPRINT
NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
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X9319
PACKAGING INFORMATION
8-Lead Plastic, DIP, Package Code P8
0.430 (10.92)
0.360 (9.14)
0.260 (6.60)
0.240 (6.10)
Pin 1 Index
Pin 1
0.060 (1.52)
0.020 (0.51)
0.300
(7.62) Ref.
Half Shoulder Width On
All End Pins Optional
0.145 (3.68)
0.128 (3.25)
Seating
Plane
0.025 (0.64)
0.015 (0.38)
0.065 (1.65)
0.150 (3.81)
0.125 (3.18)
0.045 (1.14)
0.110 (2.79)
0.090 (2.29)
0.020 (0.51)
0.016 (0.41)
0.325 (8.25)
0.300 (7.62)
.073 (1.84)
Max.
0°
Typ. 0.010 (0.25)
15°
NOTE:
1. ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
ꢀ. PACKAGE DIMENSIONS EXCLUDE MOLDING FLASH
©Xicor, Inc. 2003 Patents Pending
LIMITED WARRANTY
Devices sold by Xicor, Inc. are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Xicor, Inc. makes no warranty,
express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement.
Xicor, Inc. makes no warranty of merchantability or fitness for any purpose. Xicor, Inc. reserves the right to discontinue production and change specifications and prices
at any time and without notice.
Xicor, Inc. assumes no responsibility for the use of any circuitry other than circuitry embodied in a Xicor, Inc. product. No other circuits, patents, or licenses are implied.
TRADEMARK DISCLAIMER:
Xicor and the Xicor logo are registered trademarks of Xicor, Inc. AutoStore, Direct Write, Block Lock, SerialFlash, MPS, BiasLock and XDCP are also trademarks of
Xicor, Inc. All others belong to their respective owners.
U.S. PATENTS
Xicor products are covered by one or more of the following U.S. Patents: 4,326,134; 4,393,481; 4,404,475; 4,450,402; 4,486,769; 4,488,060; 4,520,461; 4,533,846;
4,599,706; 4,617,652; 4,668,932; 4,752,912; 4,829,482; 4,874,967; 4,883,976; 4,980,859; 5,012,132; 5,003,197; 5,023,694; 5,084,667; 5,153,880; 5,153,691;
5,161,137; 5,219,774; 5,270,927; 5,324,676; 5,434,396; 5,544,103; 5,587,573; 5,835,409; 5,977,585. Foreign patents and additional patents pending.
LIFE RELATED POLICY
In situations where semiconductor component failure may endanger life, system designers using this product should design the system with appropriate error detection
and correction, redundancy and back-up features to prevent such an occurrence.
Xicor’s products are not authorized for use in critical components in life support devices or systems.
1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to
perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user.
2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life
support device or system, or to affect its safety or effectiveness.
Characteristics subject to change without notice. 10 of 10
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相关型号：
X9319WS8
10K DIGITAL POTENTIOMETER, INCREMENT/DECREMENT CONTROL INTERFACE, 100 POSITIONS, PDSO8, PLASTIC, SOIC-8
RENESAS
X9319WS8I
10K DIGITAL POTENTIOMETER, INCREMENT/DECREMENT CONTROL INTERFACE, 100 POSITIONS, PDSO8, PLASTIC, SOIC-8
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X9319WS8IT1
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