X9316WPI-2.7 [XICOR]
Digital Potentiometer, CMOS, PDIP14,;
| 型号： | X9316WPI-2.7 |
| 厂家： | 
XICOR INC. |
| 描述： | Digital Potentiometer, CMOS, PDIP14, 光电二极管 |
| 文件： | 总10页 (文件大小：68K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
APPLICATION NOTE
A V A I L A B L E
AN99, AN115, AN120, AN124, AN133, AN134, AN135
Low Noise, 32 Taps
X9316
Digitally-Controlled (XDCP™) Potentiometer
FEATURES
DESCRIPTION
• Solid-State Potentiometer
• Three-Wire Serial Interface
• Low Noise
The Xicor X9316 is a digitally-controlled (XDCP)
potentiometer. The device consists of a resistor array,
wiper switches, a control section, and nonvolatile
memory. The wiper position is controlled by a three-
wire interface.
• 32 Wiper Tap Points
—Wiper position stored in nonvolatile memory
and recalled on power-up
• 31 Resistive Elements
—Temperature compensated
—End to end resistance range ± 20%
—Terminal voltages, -5V to +5V
• Low Power CMOS
The potentiometer is implemented by a resistor array
composed of 31 resistive elements and a wiper
switching 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, 1µA max.
• High Reliability
—Endurance, 100,000 data changes per bit
—Register data retention, 100 years
The device can be used as a three-terminal
potentiometer or as a two-terminal variable resistor in
a wide variety of applications including:
• R
Values = 1KΩ, and 10KΩ
TOTAL
• Packages
—14-lead SOIC and DIP
– control
– parameter adjustments
– signal processing
BLOCK DIAGRAM
U/D
INC
CS
5-Bit
R /V
31
H
H
Up/Down
Counter
V
V+
CC
30
29
28
R /V
Up/Down
(U/D)
H
H
5-Bit
Nonvolatile
Memory
One
of
Control
and
Memory
Device Select
Increment
R
/V
W
W
(INC)
Thirty Two
Decoder
Transfer
Gates
Resistor
Array
(CS)
R /V
L
L
2
V
V–
SS
Store and
Recall
Control
Circuitry
1
0
General
R /V
L
L
V+
R
/V
W
W
V-
CC
SS
V
V
Detailed
XDCP is a trademark of Xicor, Inc.
REV 1.1.2 10/15/00
Characteristics subject to change without notice. 1 of 10
www.xicor.com
X9316
PIN DESCRIPTIONS
V+, V– (Analog positive/negative power supply)
V+ and V– are the analog supply voltages for the
XDCP.
R /V and R /V
H
L
H
L
The high (R /V ) and low (R /V ) terminals of the
H
L
H
L
X9316 are equivalent to the fixed terminals of a
PIN CONFIGURATION
mechanical potentiometer. The minimum voltage is V–
and the maximum is V+. The terminology of R /V and
L
14-Lead DIP/SOIC
L
R /V references 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.
H
H
NC
V
NC
INC
U/D
1
2
3
4
5
6
7
14
13
12
11
10
9
CC
CS
R V
R V
L L
X9316
H
V
H
SS
V-
RW/VW
R
V
W
W
R /V is the wiper terminal and is equivalent to the
W
w
V+
movable terminal of a mechanical potentiometer. The
position of the wiper within the array is determined by
the control inputs. The wiper terminal series resistance
is typically 100Ω.
8
NC
NC
PIN NAMES
Symbol
Up/Down (U/D)
Description
The U/D input controls the direction of the wiper
movement and whether the counter is incremented or
decremented.
R /V
High Terminal
H
H
W
L
R /V
W
Wiper Terminal
R /V
L
Low Terminal
Increment (INC)
V
SS
Ground
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.
V
Digital Supply Voltage
Up/Down Control Input
Increment Control Input
Chip Select Control Input
Positive Analog Voltage
Negative Analog Voltage
No Connection
CC
U/D
INC
CS
V+
Chip Select (CS)
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 X9316
will be placed in the low power standby mode until the
device is selected once again.
V–
NC
Characteristics subject to change without notice. 2 of 10
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X9316
PRINCIPLES OF OPERATION
The system may select the X9316, 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 power-up/down cycle recalled the
previously stored data.
There are three sections of the X9316: the input
control, counter and decode section; the nonvolatile
memory; and the resistor array. The input 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. Under the proper conditions
the contents of the counter can be stored in nonvolatile
memory and retained for future use. The resistor array
is comprised of 31 individual resistors connected in
series. At either end of the array and between each
resistor is an electronic switch that transfers the
connection at that point to the wiper.
This procedure allows the system to always power-up
to a preset value stored in nonvolatile memory; 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 wiper, when at either fixed terminal, does not
move beyond the last position. That is, the counter
does not wrap around when clocked to either extreme.
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.
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,
MODE SELECTION
multiple taps are connected to the wiper for t (INC to
IW
V
change). The R
value for the device can
CS
L
INC
U/D
H
Mode
W
TOTAL
temporarily be reduced by a significant amount if the
wiper is moved several positions.
Wiper Up
L
L
Wiper Down
When the device is powered-down, the last wiper
position stored will be maintained in the nonvolatile
memory. When power is restored, the contents of the
memory are recalled and the wiper is set to the value
last stored.
H
X
L
X
Store Wiper Position
Standby Current
H
X
X
No Store, Return to Standby
SYMBOL TABLE
Instructions and Programming
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) a seven bit counter. The output of this
counter is decoded to select one of thirty two wiper
positions along the resistive array.
WAVEFORM
INPUTS
OUTPUTS
Must be
steady
Will be
steady
May change
from Low to
High
Will change
from Low to
High
May change
from High to
Low
Will change
from High to
Low
The value of the counter is stored in nonvolatile
memory whenever CS transistions HIGH while the INC
input is also HIGH.
Don’t Care:
Changes
Allowed
Changing:
State Not
Known
N/A
Center Line
is High
Impedance
Characteristics subject to change without notice. 3 of 10
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X9316
ABSOLUTE MAXIMUM RATINGS
COMMENT
Temperature under bias ....................–65°C to +135°C
Storage temperature .........................–65°C to +150°C
Stresses above those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device.
This is a stress rating only and the 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 conditions for extended periods may
affect device reliability.
Voltage on CS, INC, U/D, V , V and
H
L
V
CC
with respect to V .........................–1V to +7V
SS
∆V = |V –V |
H
L
X9316W .............................................................. 10V
Lead temperature (soldering 10 seconds)..........300°C
I
(10 seconds) .............................................. ±8.8mA
W
RECOMMENDED OPERATING CONDITIONS
Temperature
Commercial
Industrial
Min.
0°C
Max.
+70°C
+85°C
Supply Voltage (V
X9316
)
Limits
5V ±10%
CC
–40°C
X9316-2.7
2.7V to 5.5V
POTENTIOMETER CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)
Limits
Symbol
Parameter
Min.
Typ.
Max.
±20
V+
Units
%
Test Conditions/Notes
End to End Resistance Tolerance
V
V
Terminal Voltage
V–
V–
V
VH
H
V
V Terminal Voltage
L
V+
V
VL
V+
V–
Analog Positive Power Supply
Analog Negative Power Supply
Power Rating
4.5
5.5
–5.5
10
V
–4.5
V
mW
mW
Ω
R
R
= 10 KΩ
= 1 KΩ
TOTAL
TOTAL
Power Rating
16
R
Wiper Resistance
Wiper Current
100
I
= 1mA, V = 5V
W
W CC
I
4.4
mA
dBV
%
W
Noise
-120
3
Ref: 1kHz
Resolution
Absolute Linearity(1)
Relative Linearity(2)
±1
MI(3)
MI(3)
ppm/°C
ppm/°C
pF
R
—R
w(n)(actual)
w(n)(expected)
]
±0.2
R
—[R
w(n+1) w(n)+MI
R
Temperature Coefficient
±300
TOTAL
Ratiometric Temperature Coefficient
Potentiometer Capacitances
±20
C /C /C
W
10/10/25
See circuit #3
H
L
Notes: (1) Absolute Linearity is utilized to determine actual wiper voltage versus expected voltage = (V
(actual)—V
(expected)) = ±1 Ml
w(n)
w(n)
Maximum.
(2) Relative Linearity is a measure of the error in step size between taps = R
—[R
+ Ml] = ±0.2 Ml.
w(n)
W(n+1)
(3) 1 Ml = Minimum Increment = R
/31.
TOT
Characteristics subject to change without notice. 4 of 10
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X9316
D.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified.)
Limits
(4)
Symbol
Parameter
Active Current
Min. Typ.
Max. Units
Test Conditions
I
V
CC
1
3
mA
CS = V , U/D = V or V and
CC
IL
IL
IH
INC = 0.4V/2.4V @ max. t
CYC
I
Standby Supply Current
V+ Supply Current
1
µA
CS = V – 0.3V, U/D and INC
CC
SB
= V or V – 0.3V
SS
CC
(5)
I
I
1
mA
mA
CS = V , U/D = V or V and
IL IL IH
V+
V–
INC = 0.4V/2.4V @ max. t
CYC
V– Supply Current
1
CS = V , U/D = V or V and
IL IL IH
(5)
INC = 0.4V/2.4V @ max. t
CYC
I
CS, INC, U/D Input Leakage Current
CS, INC, U/D Input HIGH Voltage
CS, INC, U/D Input LOW Voltage
CS, INC, U/D Input Capacitance
±10
µA
V
V
= V to V
SS CC
LI
IN
V
2
V
+ 1
CC
IH
V
–1
0.8
10
V
IL
(5)
C
pF
V
= 5V, V = V
,
IN
CC
IN
SS
T = 25°C, f = 1MHz
A
ENDURANCE AND DATA RETENTION
Parameter
Minimum Endurance
Data Retention
Min.
100,000
100
Units
Data Changes per Bit
Years
Notes: (4) Typical values are for T = 25°C and nominal supply voltage.
A
(5) This parameter is periodically sampled and not 100% tested.
Test Circuit #1
Test Circuit #2
Circuit #3 SPICE Macromodel
V /R
V /R
H
H
H
R
H
TOTAL
Test Point
R
R
L
H
C
L
C
W
C
H
V
S
10pF
Test Point
/R
V
/R
W
W
V
W
W
25pF
Force
Current
10pF
V /R
V /R
L
L
L
L
R
W
Characteristics subject to change without notice. 5 of 10
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X9316
A.C. CONDITIONS OF TEST
Input pulse levels
0V to 3V
Input rise and fall times
Input reference levels
10ns
1.5V
A.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified)
Limits
(6)
Symbol
Parameter
Min.
100
100
2.9
1
Typ.
Max.
Units
ns
t
t
CS to INC Setup
Cl
lD
DI
INC HIGH to U/D Change
U/D to INC Setup
ns
t
µs
t
INC LOW Period
µs
lL
lH
lC
t
t
INC HIGH Period
1
µs
INC Inactive to CS Inactive
CS Deselect Time (NO STORE)
CS Deselect Time (STORE)
INC to Vw Change
1
µs
t
t
100
10
ns
CPH
ms
µs
CPH
t
1
5
5
IW
t
INC Cycle Time
4
µs
CYC
(7)
t
t
INC Input Rise and Fall Time
Power up to Wiper Stable
500
5
µs
,
R
F
(7)
t
µs
PU
(7)
t V
V
CC
Power-up Rate
0.2
50
10
V/ms
ms
R
CC
t
Store Cycle
WR
POWER UP AND DOWN REQUIREMENTS
There are no restrictions on the sequencing of bias supplies V , V+, and V- provided that all three supplies reach
CC
their final values within 1msec of each other. At all times, voltages on the potentiometer pins must be less than V+
and more than V-. The recall of the wiper position from nonvolatile memory is not in effect until all supplies reach
their final value.The V ramp rate spec is always in effect.
CC
A.C. TIMING
CS
t
CYC
t
t
t
t
t
CPH
CI
IL
IH
IC
90% 90%
10%
INC
U/D
t
t
DI
ID
t
t
R
F
t
IW
(8)
MI
V
W
Notes: (6) Typical values are for T = 25°C and nominal supply voltage.
A
(7) This parameter is sample tested.
(8) MI in the A.C. timing diagram refers to the minimum incremental change in the V output due to a change in the wiper position.
W
Characteristics subject to change without notice. 6 of 10
REV 1.1.2 10/15/00
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X9316
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
V
R
V
R
V
V
H
V
W
L
I
Three terminal potentiometer;
variable voltage divider
Two terminal variable resistor;
variable current
Basic Circuits
Noninverting Amplifier
Buffered Reference Voltage
Cascading Techniques
R
1
+5V
+V
+V
LM308A
+V
V
+
–
S
+5V
V
O
V
OP-07
W
+
–
V
REF
–5V
X
V
OUT
V
W
R
2
+V
–5V
= V
R
1
V
V
W
OUT
W
(a)
(b)
V
= (1+R /R )V
2 1
O
S
Voltage Regulator
Offset Voltage Adjustment
Comparator with Hysterisis
R
R
2
1
V
V (REG)
O
317
IN
LT311A
V
S
V
–
+
S
V
O
R
1
100KΩ
–
+
V
O
I
adj
TL072
R
2
10KΩ
10KΩ
+12V
R
R
1
2
V
V
= {R /(R +R )} V (max)
1 1 2 O
UL
LL
10KΩ
-12V
= {R /(R +R )} V (min)
1
1
2
O
V
(REG) = 1.25V (1+R /R )+I
R
adj 2
O
2
1
(for additional circuits see AN115)
Characteristics subject to change without notice. 7 of 10
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X9316
PACKAGING INFORMATION
14-Lead Plastic Dual In-Line Package Type P
0.720 (18.29)
0.640 (16.26)
0.260 (6.60)
0.240 (6.10)
Pin 1 Index
Pin 1
0.060 (1.52)
0.050 (1.27)
0.600 (15.24)
Ref.
Half Shoulder Width on
All End Pins Optional
0.145 (3.68)
0.128 (0.51)
Seating
Plane
0.025 (0.64)
0.015 (0.38)
0.150 (3.81)
0.125 (3.18)
0.065 (1.65)
0.045 (1.14)
0.110 (2.79)
0.090 (2.29)
0.020 (0.51)
0.016 (0.41)
0.325 (8.26)
0.300 (7.62)
0.015 (0.38)
Max.
0°
Typ. 0.010 (0.25)
15°
NOTE:
1. ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
2. PACKAGE DIMENSIONS EXCLUDE MOLDING FLASH
Characteristics subject to change without notice. 8 of 10
REV 1.1.2 10/15/00
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X9316
PACKAGING INFORMATION
14-Lead Plastic Small Outline Gullwing Package Type S
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)
0.020 (0.51)
0.336 (8.55)
0.345 (8.75)
(4X) 7°
0.053 (1.35)
0.069 (1.75)
0.004 (0.10)
0.010 (0.25)
0.050 (1.27)
0.050"Typical
0.010 (0.25)
0.020 (0.50)
X 45°
0.050"Typical
0° – 8°
0.250"
0.0075 (0.19)
0.010 (0.25)
0.016 (0.410)
0.037 (0.937)
0.030"Typical
14 Places
FOOTPRINT
NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
Characteristics subject to change without notice. 9 of 10
REV 1.1.2 10/15/00
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X9316
ORDERING INFORMATION
X9316X
X
X
X
V
Range
CC
Blank = 4.5V to 5.5V
3 = 3V to 5.5V
Temperature Range
Blank = Commercial = 0°C to +70°C
I = Industrial = –40°C to +85°C
M = Military = –55°C to +125°C
Package
P = 14-Lead Plastic DIP
S = 14-Lead SOIC
End to End Resistance
Z = 1KΩ
W = 10KΩ
Physical Characteristics
Marking Includes
Manufacturer’s Trademark
Resistance Value or Code
Date Code
©Xicor, Inc. 2000 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, 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
REV 1.1.2 10/15/00
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