X9317TM8I [XICOR]
Digital Potentiometer, 1 Func, 100000ohm, Increment/decrement Control Interface, 100 Positions, PDSO8, MSOP-8;
| 型号： | X9317TM8I |
| 厂家： | 
XICOR INC. |
| 描述： | Digital Potentiometer, 1 Func, 100000ohm, Increment/decrement Control Interface, 100 Positions, PDSO8, MSOP-8 光电二极管 转换器 电阻器 |
| 文件： | 总14页 (文件大小：358K) |
| 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
AN20 • AN42–53 • AN71 • AN73 • AN88 • AN91–92 • AN99 • AN115 • AN120 • AN124 • AN133 • AN134
Low Noise, Low Power, 100 Taps
X9317
Digitally Controlled Potentiometer (XDCP™)
FEATURES
DESCRIPTION
• Nonvolatile solid state potentiometer
• Single device
• 100 resistor taps
• 3-wire serial up/down interface
• Wiper resistance 200Ω typ. at 5V
The Xicor X9317 is a nonvolatile digitally controlled
potentiometer (XDCP). The device consists of a poly-
crystalline resistor array of 99 segments and CMOS
switches that connect the wiper terminal to any one of
the 100 nodes in the array of resistors. The wiper posi-
tion is defined by the data that is transmitted to the
device on the 3 terminal serial Up/Down port. A pulse
on the increment pin causes the wiper to move one
step to the next wiper position. The direction the wiper
moves is defined by the logic state on the Up/Down
pin. A rising edge on the Chip Select pin while the
increment pin is high causes the present wiper posi-
tion to be written into an EPROM register. This value is
recalled on power up restoring the last wiper position
that was written into the register.
• R
values = 1kΩ, 10kΩ, 50kΩ, 100kΩ
TOTAL
• Standby current < 1µA
• V = 5V and 2.7V to 5.5V
CC
• Endurance = 100,000 cycles
• Data retention = 100 years
• Packages – 8-lead DIP, SOIC,TSSOP, MSOP
The device can be used in the two terminal mode, with
the wiper connected to one end of the total resistor, as
a variable resistor or can be used in the three terminal
mode as a programmable voltage reference. The
X9317 can be used to program offset voltages or set
gains on amplifiers in control circuits.
BLOCK DIAGRAM
7-Bit
U/D
INC
CS
R /V
99
98
97
96
H
H
Up/Down
Counter
V
(Supply Voltage)
CC
R /V
H
H
Up/Down
(U/D)
7-Bit
Nonvolatile
Memory
Control
and
Memory
One
of
One
Increment
(INC)
R
/V
W
W
Transfer
Gates
Resistor
Array
Device Select
(CS)
Hundred
Decoder
R /V
L
L
2
1
0
V
(Ground)
Store and
Recall
Control
Circuitry
SS
General
V
V
CC
SS
R /V
L
L
R
/V
W
W
Detailed
Characteristics subject to change without notice. 1 of 14
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X9317
PIN DESCRIPTIONS
R /V and R /V
PIN CONFIGURATION
TSSOP
H
L
H
L
The high (R /V ) and low (R /V ) terminals of the
X9317 are equivalent to the fixed terminals of a
mechanical potentiometer. The minimum voltage is
H
L
H
L
R /V
CS
1
2
3
4
8
7
6
5
L
L
V
R
V
/V
W W
CC
INC
U/D
X9317
V
and the maximum is V . The terminology of R /
CC
L
SS
SS
V and R /V references the relative position of the
R /V
H
L
H
H
H
terminal in relation to wiper movement direction
selected by the U/D input and not the voltage potential
on the terminal.
DIP/SOIC/MSOP
V
INC
U/D
1
2
3
4
8
7
6
5
CC
RW/VW
CS
R /V is the wiper terminal and is equivalent to the
w
w
X9317
R /V
R /V
H
L
L
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
H
V
R
/V
W
SS
W
is typically 200Ω when V = 5V.
CC
PIN NAMES
Symbol
Up/Down (U/D)
Description
The U/D input controls the direction of the wiper move-
ment and whether the counter is incremented or dec-
remented.
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 decre-
ment the counter in the direction indicated by the logic
level on the U/D input.
V
CC
Supply Voltage
U/D
Up/Down Control Input
Increment Control Input
Chip Select Control Input
INC
CS
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 X9317
will be placed in the low power standby mode until the
device is selected once again.
Characteristics subject to change without notice. 2 of 14
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X9317
PRINCIPLES OF OPERATION
The system may select the X9317, move the wiper,
and deselect the device without having to store the lat-
est 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
will 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 X9317: the input con-
trol, counter and decode section; the nonvolatile mem-
ory; 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 com-
prised of 99 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 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 pref-
erence, system parameter changes due to tempera-
ture drift, etc...
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.
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
CS
L
INC
U/D
H
Mode
IW
V
change). The R
value for the device can tem-
W
TOTAL
Wiper Up
porarily be reduced by a significant amount if the wiper
is moved several positions.
L
L
Wiper Down
H
X
L
X
Store Wiper Position
Standby Current
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.
H
X
X
No Store, Return to Standby
SYMBOL TABLE
INSTRUCTIONS AND PROGRAMMING
WAVEFORM
INPUTS
OUTPUTS
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 one hundred wiper
positions along the resistive array.
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
Don’t Care:
Changes
Allowed
Changing:
State Not
Known
The value of the counter is stored in nonvolatile mem-
ory whenever CS transitions HIGH while the INC input
is also HIGH.
N/A
Center Line
is High
Impedance
Characteristics subject to change without notice. 3 of 14
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X9317
ABSOLUTE MAXIMUM RATINGS
COMMENT
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 and the functional operation
of the device at these or any other conditions above
those listed in the operational sections of this specifi-
cation is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect
device reliability.
Storage temperature .........................–65°C to +150°C
Voltage on CS, INC, U/D, V , V and
H
L
V
with respect to V .........................–1V to +7V
CC
SS
∆V = |V –V |........................................................... 5V
H
L
Lead temperature (soldering 10 seconds)..........300°C
(10 seconds) ................................................ 8.8mA
I
W
RECOMMENDED OPERATING CONDITIONS
Temperature
Commercial
Industrial
Min.
0°C
Max.
+70°C
+85°C
Supply Voltage (V
X9317
)
Limits
5V 10ꢀ
CC
–40°C
X9317-2.7
2.7V to 5.5V
POTENTIOMETER CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)
Limits
Symbol
Parameter
Min.
Typ. Max.
Unit
ꢀ
Test Conditions/Notes
R
V
End to End Resistance Variation
20
TOTAL
VH/RH
V
Terminal Voltage
V
V
V
V
V
V
V
= 0V
= 0V
H
SS
SS
CC
SS
V
V Terminal Voltage
L
V
VL/RL
CC
SS
Power Rating
Power Rating
Wiper Resistance
Wiper Resistance
Wiper Current
Noise
10
25
mW
mW
Ω
R
R
≥ 10 KΩ
TOTAL
TOTAL
= 1 KΩ
R
R
200
400
400
1000
4.4
I
I
= 1mA, V = 5V
CC
W
W
W
Ω
= 1mA, V = 2.7V
CC
W
I
mA
dBV
ꢀ
MI(3)
MI(3)
ppm/°C
W
-120
1
Ref: 1kHz
V –V
Resolution
Absolute Linearity(1)
Relative Linearity(2)
1
w(n)(actual) w(n)(expected)
.2
V
–[V
]
w(n+1)
w(n)+MI
R
Temperature Coefficient
300
TOTAL
Ratiometric Temperature Coefficient
Potentiometer Capacitances
20 ppm/°C
pF See circuit #3
C /C /C
W
10/10/
25
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 = V
–[V
+ Ml] = 0.2 Ml.
w(n)
W(n+1)
(3) 1 Ml = Minimum Increment = R
/99.
TOT
(4) Typical values are for T = 25°C and nominal supply voltage.
A
(5) This parameter is periodically sampled and not 100ꢀ tested.
Characteristics subject to change without notice. 4 of 14
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X9317
D.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified.)
Limits
(4)
Typ.
Symbol
Parameter
Min.
Max.
Unit
Test Conditions
I
V
Active Current
50
µA
CS = V , U/D = V or V and
CC
CC1
IL
IL
IH
(Increment)
INC = 0.4V/2.4V @ max. t
CYC
I
V
Active Current
400
1
µA
µA
µA
CS = V , U/D = V or V and
IH IL IH
CC
CC2
(Store) (EEPROM Store)
INC = V @ max. t
IH WR
I
Standby Supply Current
CS = V – 0.3V, U/D and INC
CC
SB
= V or V – 0.3V
SS
CC
I
CS, INC, U/D Input
Leakage Current
CS, INC, U/D Input
HIGH Voltage
10
V
= V to V
SS CC
LI
IN
V
V
x 0.7
V + 0.5
CC
V
V
IH
CC
V
CS, INC, U/D Input
LOW Voltage
–0.5
V
x 0.1
CC
IL
(5)
C
CS, INC, U/D Input
Capacitance
10
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.
Unit
100,000
100
Data changes per bit per bit
Years
Circuit #3 SPICE Macro Model
Test Circuit #1
Test Circuit #2
V
H
R
V /R
H
TOTAL
H
R
R
L
H
Test Point
C
L
C
W
C
H
10pF
V
S
Test Point
/R
V
W
V
25pF
W
W
Force
Current
10pF
V
V /R
L
L
L
R
W
Characteristics subject to change without notice. 5 of 14
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X9317
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
Symbol
Parameter
Min.
100
100
2.9
1
Typ.(6)
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)
1
µs
t
t
100
10
ns
CPH
ms
µs
CPH
t
INC to V Change
W
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
A.C. TIMING
CS
t
CYC
(store)
t
t
t
t
IC
t
CI
IL
IH
CPH
90ꢀ 90ꢀ
10ꢀ
INC
U/D
t
t
t
t
R
ID
DI
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 100ꢀ 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 14
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X9317
PERFORMANCE CHARACTERISTICS (TYPICAL)
Typical Total Resistance Temperature Coefficient
0
-50
-100
-150
PPM
-200
-250
-300
-350
-55 -45 -35 -25 -15
-5
5
15
25
35
45
55
65
75
85
95
105 115 125
Temperature (°C)
Characteristics subject to change without notice. 7 of 14
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X9317
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
R
V
R
V /R
H
H
V
/R
W
W
V /R
L
L
I
Three terminal potentiometer;
variable voltage divider
Two terminal variable resistor;
variable current
Basic Circuits
Noninverting Amplifier
Buffered Reference Voltage
Cascading Techniques
+5V
R
1
+V
+V
LM308A
V
+
–
S
+V
V
+5V
O
V
OP-07
W
+
–
–5V
V
REF
X
V
V
/R
W
OUT
W
R
2
+V
–5V
= V /R
R
1
V
/R
W
V
W
OUT
W
W
(a)
(b)
V
= (1+R /R )V
2 1 S
O
Voltage Regulator
Comparator with Hysteresis
Offset Voltage Adjustment
LT311A
R
R
2
1
V
–
+
S
V
V (REG)
O
317
IN
V
V
O
S
R
1
100KΩ
–
+
V
O
I
adj
TL072
R
R
1
2
R
2
10KΩ
10KΩ
+12V
V
V
= {R /(R +R )} V (max)
1 1 2 O
= {R /(R +R )} V (min)
UL
LL
1
1
2
O
10KΩ
-12V
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. 8 of 14
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X9317
PACKAGING INFORMATION
8-Lead Plastic Dual In-Line Package Type P
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)
2. PACKAGE DIMENSIONS EXCLUDE MOLDING FLASH
Characteristics subject to change without notice. 9 of 14
REV 1.1.4 12/09/02
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X9317
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. 10 of 14
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X9317
PACKAGING INFORMATION
8-Lead Plastic, TSSOP, Package Type V
.025 (.65) BSC
.169 (4.3)
.252 (6.4) BSC
.177 (4.5)
.114 (2.9)
.122 (3.1)
.047 (1.20)
.0075 (.19)
.0118 (.30)
.002 (.05)
.006 (.15)
.010 (.25)
Gage Plane
0° – 8°
Seating Plane
.019 (.50)
.029 (.75)
(7.72)
(4.16)
Detail A (20X)
(1.78)
(0.42)
.031 (.80)
.041 (1.05)
(0.65)
All Measurements Are Typical
See Detail “A”
NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
Characteristics subject to change without notice. 11 of 14
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X9317
PACKAGING INFORMATION
M Package
8-Lead Miniature Small Outline Gull Wing Package Type MSOP
0.118 0.002
(3.00 0.05)
0.012 + 0.006 / -0.002
0.0256 (0.65) Typ.
(0.30 + 0.15 / -0.05)
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. 12 of 14
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X9317
ORDERING INFORMATION
X9317X
X
X
X
V
Limits
CC
Blank = 5V 10ꢀ
–2.7 = 2.7V to 5.5V
Temperature Range
Blank = Commercial = 0°C to +70°C
I = Industrial = –40°C to +85°C
Package
P = 8-Lead Plastic Dip
S8 = 8-Lead SOIC
V8 = 8-Lead TSSOP
M8 = 8-Lead MSOP
End to End Resistance
W =10KΩ
U = 50KΩ
Z = 1KΩ
T = 100KΩ
Physical Characteristics
MSOP Part No.
X9317WM8
Mark
ABF
Marking Includes
Manufacturer’s Trademark
Resistance Value or Code
Date Code
X9317WM8-2.7
X9317WM8I
X9317WM8I-2.7
X9317UM8
ACZ
ADS
ADT
AEC
AED
AFE
X9317UM8-2.7
X9317UM8I
X9317UM8I-2.7
X9317ZM8
AFF
AFG
AFH
AFI
X9317ZM8-2.7
X9317ZM8I
X9317ZM8I-2.7
X9317TM8
AFJ
AGD
AGE
AGF
AGG
9317T
317TF
317TI
317TG
X9317TM8-2.7
X9317TM8I
X9317TM8I-2.7
X9317TV8
X9317TV8-2.7
X9317TV8I
X9317TV8I-2.7
Characteristics subject to change without notice. 13 of 14
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X9317
©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. 14 of 14
REV 1.1.4 12/09/02
www.xicor.com
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