X9314WMIT2 [XICOR]
Digital Potentiometer, 1 Func, 10000ohm, Increment/decrement Control Interface, 32 Positions, PDSO8, MSOP-8;
| 型号： | X9314WMIT2 |
| 厂家： | 
XICOR INC. |
| 描述： | Digital Potentiometer, 1 Func, 10000ohm, Increment/decrement Control Interface, 32 Positions, PDSO8, MSOP-8 光电二极管 转换器 电阻器 |
| 文件： | 总9页 (文件大小：292K) |
| 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
AN42 • AN44–50 • AN52 • AN53 • AN71 • AN73 • AN99 • AN115 • AN120 • AN124 • AN134
Terminal Voltages 5V, 32 Taps, Log Taper
X9314
Single Digitally Controlled Potentiometer (XDCP™)
FEATURES
DESCRIPTION
• Solid State Potentiometer
The Xicor X9314 is
a
solid state nonvolatile
• 32 Taps
potentiometer and is ideal for digitally controlled
resistance trimming.
• 10KΩ End to End Resistance
• Three-Wire Up/Down Serial Interface
• Wiper Resistance, 40Ω Typical
• Nonvolatile Storage and Recall on Power Up of
Wiper Position Standby Current < 500µA Max
(Total Package)
The X9314 is a resistor array composed of 31 resistive
elements. Between each element and at either end are
tap points accessible to the wiper element. 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
= 3V to 5.5V Operation
CC
• 100Year Data Retention
• Offered in MSOP, SOIC Packages
The XDCP can be used as
a three-terminal
potentiometer or as a two-terminal variable resistor in
a wide variety of applications including control,
parameter adjustments, and signal processing.
BLOCK DIAGRAM
U/D
INC
CS
31
5-Bit
Up/Down
Counter
V /R
H
H
30
29
28
5-Bit
Nonvolatile
Memory
One
of
Thirty-Two
Decoder
Transfer
Gates
Resistor
Array
2
1
0
Store and
Recall
Control
Circuitry
V
V /R
CC
L
L
V
SS
V
/R
W
W
XDCP is a trademark of Xicor, Inc.
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Characteristics subject to change without notice. 1 of 9
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X9314
PIN DESCRIPTIONS
HIGH. After the store operation is complete the X9314
will be placed in the low power standby mode until the
device is selected once again.
V /R and V /R
L
H
H
L
The high (V /R ) and low (V /R ) terminals of the
H
H
L
L
PIN CONFIGURATION
X9314 are equivalent to the fixed terminals of a
mechanical potentiometer. The minimum voltage is –
5V and the maximum is +5V. It should be noted that
8-Lead DIP/SOIC
the terminology of V /R and V /R references the
L
L
H
H
V
INC
U/D
1
2
3
4
8
7
6
5
CC
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.
CS
X9314
V /R
L
V /R
L
H
H
V
V /R
W W
SS
V /R
W
W
V /R is the wiper terminal, equivalent to the movable
8-Lead MSOP
W
W
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
40Ω.
V /R
U/D
INC
H
H
1
8
7
6
5
V
2
3
4
SS
X9314
V
CC
V
/R
W
W
CS
V /R
L
L
Up/Down (U/D)
The U/D input controls the direction of the wiper
movement and whether the counter is incremented or
decremented.
PIN NAMES
Symbol
Description
Increment (INC)
V /R
High Terminal
H
H
W
L
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 /R
Wiper Terminal
Low Terminal
Ground
W
V /R
L
V
SS
CC
V
Supply Voltage
Up/Down Input
Increment Input
Chip Select Input
Chip Select (CS)
U/D
INC
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
Typical Attenuation Characteristics (dB)
0
-20
-40
-43.5
-60
0
31
28
24
20
16
8
4
12
Tap Position
Characteristics subject to change without notice. 2 of 9
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X9314
PRINCIPLES OF OPERATION
movement is performed as described above; once the
new position is reached, the system would keep the
INC LOW while taking CS HIGH. The new wiper
position would 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 X9314: 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
potential at that point to the wiper.
This would allow 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 state of U/D may be changed while CS remains
LOW. This allows the host system to enable the X9314
and then move the wiper up and down until the proper
trim is attained.
The INC, U/D and CS inputs control the movement of
the wiper along the resistor array. With CS set LOW the
X9314 is selected and enabled to respond to the
t
/R
IW TOTAL
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 five bit counter. The output of this
counter is decoded to select one of thirty-two wiper
positions along the resistive array.
The electronic switches on the X9314 operate in a
“make before break” mode when the wiper changes
tap positions. If the wiper is moved several positions
multiple taps are connected to the wiper for t (INC to
V
IW
change). The R
value for the device can
W
TOTAL
The wiper, when at either fixed terminal, acts like its
mechanical equivalent and does not move beyond the
last position. That is, the counter does not wrap around
when clocked to either extreme.
temporarily be reduced by a significant amount if the
wiper is moved several positions.
SYMBOL TABLE
The value of the counter is stored in nonvolatile
memory whenever CS transistions HIGH while the INC
input is also HIGH.
WAVEFORM
INPUTS
OUTPUTS
Must be
steady
Will be
steady
When the X9314 is powered-down, the last counter
position stored will be maintained in the nonvolatile
memory. When power is restored, the contents of the
memory are recalled and the counter is reset to the
value last stored.
May change
from Low to
High
Will change
from Low to
High
May change
from High to
Low
Will change
from High to
Low
Operation Notes
Don’t Care:
Changes
Allowed
Changing:
State Not
Known
The system may select the X9314, move the wiper and
deselect the device without having to store the latest
wiper position in nonvolatile memory.The wiper
N/A
Center Line
is High
Impedance
Characteristics subject to change without notice. 3 of 9
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X9314
ABSOLUTE MAXIMUM RATINGS
COMMENT
Temperature under bias ....................–65°C to +135°C
Storage temperature .........................–65°C to +150°C
Voltage on CS, INC, U/D, and
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
conditions for extended periods may affect device
reliability.
V
CC
with respect to V .........................–1V to +7V
SS
Voltage on V /R and V /R referenced
H
H
L
L
to V .......................................................-8V to +8V
SS
∆V = |V /R –V /R |.............................................. 10V
H
L
H
L
Lead temperature (soldering 10 seconds)..........300°C
Wiper current ..................................................... 1mA
I
(10 seconds) .............................................. 8.8mA
W
RECOMMENDED OPERATING CONDITIONS
Temperature
Commercial
Industrial
Min.
0°C
Max.
+70°C
+85°C
Supply Voltage (V
X9314
)
Limits
5V 10%
3V to 5.5V
CC
–40°C
X9314-3
POTENTIOMETER CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)
Limits
Test Conditions/
Symbol
Parameter
Min.
Typ.
Max.
20
Units
%
Notes
R
End to End Resistance Tolerance
TOTAL
V /R Terminal Voltage
-5
-5
+5
V
H
H
V
V /R Terminal Voltage
+5
V
VL/RL
L
L
Power Rating
Wiper Resistance
Wiper Current
Noise
10
mW
Ω
at 25°C
= 1mA, V = 5V
R
40
100
4.4
I
W
W
CC
I
mA
dBV
W
-120
Ref: 1kHz
log (R )–log R
Relative variation. Error in step
size between taps.
0.07-
0.003
0.07 +
0.003
)
w(n-1)
w(n)
R
Temperature Coefficient
600
ppm/°C for -40°C to +85°C
ppm/°C
TOTAL
Ratiometric Temperature
Coefficient
20
pF
C /C /C Potentiometer Capacitance
W
10/10/25
See Circuit #3
H
L
Notes: (1) This parameter is periodically sampled and not 100% tested.
POWER UP AND DOWN REQUIREMENT
The are no restrictions on the sequencing of V
and the voltages applied to the potentiometer pins during power-
CC
up or power-down conditions. During power-up, the data sheet parameters for the DCP do not fully apply until 1
millisecond after V reaches its final value.The V ramp rate spec is always in effect.
CC
CC
Characteristics subject to change without notice. 4 of 9
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X9314
D.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified.)
Limits
Symbol
Parameter
Active Current
Min. Typ.(4)
Max.
Units
Test Conditions
CS = V , U/D = V or V and
I
V
1
3
mA
CC
CC
IL
IL
IH
INC = 0.4V/2.4V @ max. t
CYC
I
Standby Supply Current
500
10
µA
µA
CS = V – 0.3V, U/D and
CC
SB
INC = V or V – 0.3V
SS
CC
I
CS, INC, U/D Input Leakage
Current
V
= V to V
SS
LI
IN
CC
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,
CC IN SS A
IN
f = 1MHz
STANDARD PARTS
Part Number
Maximum Resistance
10KΩ
Wiper Increments
Minimum Resistance
X9314W
Log Taper
40Ω
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
Macro Model
V /R
H
H
V /R
H
H
R
TOTAL
Test Point
R
R
L
H
C
L
C
H
C
Test Point
/R
W
V
L
/R
W
Force
Current
W
10pF
V
W
W
10pF
25pF
V /R
V /R
L
L
L
R
W
A.C. CONDITIONS OF TEST
MODE SELECTION
Input Pulse Levels
Input rise and fall times
Input reference levels
0V to 3V
10ns
CS
L
INC
U/D
H
Mode
Wiper up
1.5V
L
L
Wiper down
H
X
L
X
Store wiper position
Standby
H
X
X
No store, return to standby
Characteristics subject to change without notice. 5 of 9
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X9314
A.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified)
Limits
Symbol
Parameter
CS to INC Setup
Min.
100
100
2.9
1
Typ.(6)
Max.
Units
ns
t
t
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
1
µs
t
t
20
ms
µs
CPH
t
INC to V Change
W
100
500
IW
CYC
INC Cycle Time
4
µs
(7)
t , t
INC Input Rise and Fall Time
Power up to Wiper Stable
500
500
50
µs
R
F
(7)
t
µs
PU
t V
V Power-up Rate
CC
0.2
mV/µs
R
CC
A.C. Timing
CS
t
CYC
t
IC
t
t
t
CPH
IL
IH
t
CI
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 periodically sampled and not 100% 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 9
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X9314
PACKAGING INFORMATION
8-Lead Miniature Small Outline Gull Wing Package Type M
0.118 0.002
(3.00 0.05)
0.012 + 0.006 / -0.002
(0.30 + 0.15 / -0.05)
0.0256 (0.65) Typ.
R 0.014 (0.36)
0.118 0.002
(3.00 0.05)
0.030 (0.76)
0.0216 (0.55)
7° Typ.
0.036 (0.91)
0.032 (0.81)
0.040 0.002
(1.02 0.05)
0.008 (0.20)
0.004 (0.10)
0.0256" Typical
0.025"
Typical
0.150 (3.81)
0.007 (0.18)
0.005 (0.13)
Ref.
0.193 (4.90)
Ref.
0.220"
0.020"
Typical
8 Places
FOOTPRINT
NOTE:
1. ALL DIMENSIONS IN INCHES AND (MILLIMETERS)
Characteristics subject to change without notice. 7 of 9
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X9314
PACKAGING INFORMATION
8-Lead Plastic Small Outline Gull Wing 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)
0.019 (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)
Characteristics subject to change without notice. 8 of 9
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X9314
Ordering Information
X9314 XDCP 10KΩ, LogTaper
X9314W
X
X
X
V
Range
CC
Blank = V = 5V 10%
CC
3 = V = 3V to 5.5V (Not available in Industrial Temperature)
CC
Temperature Range
Blank = 0°C to +70°C
I = –40°C to +85°C
Package
M = 8-Lead MSOP
S = 8-Lead SOIC
End to End Resistance
W = 10KΩ
Part Mark Convention
X9314W
X
X
Blank = 8-Lead SOIC
(Date Code)
Blank = 5V 10%, 0°C to 70°C
I = 5V 10%, -40°C to +85°C
D = 3V to 5.5V, 0°C to 70°C
E = 3V to 5.5V, -40°C to +85°C
©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 occurence.
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. 9 of 9
REV 1.1 11/10/00
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