X9315TMIT1 [XICOR]
Digital Potentiometer, 1 Func, 100000ohm, Increment/decrement Control Interface, 32 Positions, CMOS, PDSO8, MSOP-8;
| 型号： | X9315TMIT1 |
| 厂家： | 
XICOR INC. |
| 描述： | Digital Potentiometer, 1 Func, 100000ohm, Increment/decrement Control Interface, 32 Positions, CMOS, PDSO8, MSOP-8 光电二极管 转换器 电阻器 |
| 文件： | 总13页 (文件大小：368K) |
| 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 • AN135
Low Noise, Low Power, 32 Taps
X9315
Digitally Controlled Potentiometer (XDCP™)
FEATURES
DESCRIPTION
• Solid-state potentiometer
• 3-wire serial interface
• 32 wiper tap points
—Wiper position stored in nonvolatile memory
and recalled on power-up
The Xicor X9315 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 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.
• 31 resistive elements
—Temperature compensated
—End to end resistance range 2ꢀ0
—Terminal voltage, ꢀ to V
• Low power CMOS
CC
—V = 2.7V or 5V
CC
—Active current, 5ꢀ/4ꢀꢀµA max.
—Standby current, 1µA max.
• High reliability
—Endurance, 1ꢀꢀ,ꢀꢀꢀ data changes per bit
—Register data retention, 1ꢀꢀ 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
• Packages
values = 1ꢀKΩ, 5ꢀKΩ, 1ꢀꢀKΩ
TOTAL
– control
—8-lead SOIC, MSOP and DIP
– parameter adjustments
– signal processing
BLOCK DIAGRAM
U/D
INC
CS
5-Bit
R /V
31
H
H
Up/Down
Counter
V
(Supply Voltage)
CC
30
29
28
R /V
H
H
Up/Down
(U/D)
5-Bit
Nonvolatile
Memory
Control
and
Increment
(INC)
One
of
Thirty
Two
R
/V
W
W
Memory
Transfer
Gates
Resistor
Array
Device Select
(CS)
R /V
Decoder
L
L
2
Store and
Recall
Control
Circuitry
V
(Ground)
SS
1
0
V
V
CC
SS
General
R /V
L
L
R
/V
W
W
Detailed
XDCP™ is a trademark of Xicor, Inc.
REV 1.3.2 1/14/03
Characteristics subject to change without notice. 1 of 13
www.xicor.com
X9315
PIN DESCRIPTIONS
PIN NAMES
Symbol
Description
High terminal
R /V and R /V
H
L
H
L
R /V
H
H
W
L
The high (R /V ) and low (R /V ) terminals of the
H
L
H
L
X9315 are equivalent to the fixed terminals of a
mechanical potentiometer. The minimum voltage is
R /V
W
Wiper terminal
R /V
L
Low terminal
V
and the maximum is V . The terminology of R /
CC
L
SS
V
SS
Ground
V and R /V references the relative position of the
L
H
H
V
CC
Supply voltage
terminal in relation to wiper movement direction
selected by the U/D input, and not the voltage potential
on the terminal.
U/D
Up/Down control input
Increment control input
Chip Select control input
INC
CS
RW/VW
R /V is the wiper terminal and is equivalent to the
W
w
PRINCIPLES OF OPERATION
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
There are three sections of the X9315: 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.
is typically 200Ω at V = 5V.
CC
Up/Down (U/D)
The U/D input controls the direction of the wiper
movement and whether the counter is incremented or
decremented.
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.
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.
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 X9315
will be placed in the low power standby mode until the
device is selected once again.
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,
multiple taps are connected to the wiper for t (INC to
IW
V
change). The R
value for the device can
W
TOTAL
temporarily be reduced by a significant amount if the
wiper is moved several positions.
PIN CONFIGURATION
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.
DIP/SOIC/MSOP
INC
U/D
1
2
3
4
8
7
6
5
V
CC
CS
R /V
X9315
R /V
H
H
L
L
V
R
/V
W
SS
W
Characteristics subject to change without notice. 2 of 13
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X9315
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) a five bit counter. The output of this
counter is decoded to select one of thirty two wiper
positions along the resistive array.
CS
L
INC
U/D
H
Mode
Wiper Up
L
L
Wiper Down
H
X
L
X
Store Wiper Position
Standby Current
H
X
X
No Store, Return to Standby
The value of the counter is stored in nonvolatile
memory whenever CS transitions HIGH while the INC
input is also HIGH.
SYMBOL TABLE
WAVEFORM
INPUTS
OUTPUTS
The system may select the X9315, 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.
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
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...
N/A
Center Line
is High
Impedance
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.
Characteristics subject to change without notice. 3 of 13
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X9315
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; 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.
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) .............................................. 7.5mA
I
W
RECOMMENDED OPERATING CONDITIONS
Temperature
Commercial
Industrial
Min.
0°C
Max.
+70°C
+85°C
Supply Voltage (V
X9315
)
Limits
5V 10ꢀ
CC
–40°C
X9315-2.7
2.7V to 5.5V
POTENTIOMETER CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)
Limits
Symbol
Parameter
Min.
Typ.
Max.
Unit
ꢀ
Test Conditions/Notes
End to end resistance tolerance
20
V
V terminal voltage
0
0
V
V
V
VH
H
CC
CC
V
V terminal voltage
L
V
VL
Power rating
10
mW
Ω
R
≥ 10 KΩ
TOTAL
R
R
Wiper resistance
Wiper resistance
Wiper current
Noise
200
400
400
I
I
= 1mA, V = 5V
CC
W
W
W
1000
3.75
Ω
= 1mA, V = 2.7V
CC
W
I
mA
dBV
ꢀ
MI(3)
MI(3)
ppm/°C
W
-120
3
Ref: 1kHz
V –V
Resolution
Absolute linearity(1)
Relative linearity(2)
1
w(n)(actual) w(n)(expected)
0.2
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 = R
—[R
+ Ml] = 0.2 Ml.
w(n)
W(n+1)
(3) 1 Ml = Minimum Increment = R
/31.
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 13
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X9315
D.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified.)
Limits
(4)
Typ.
Symbol
Parameter
Min.
Max.
Unit
Test Conditions
I
V
V
active current (Increment)
50
µA
CS = V , U/D = V or V and
CC
CC1
IL
IL
IH
INC = 0.4V @ max. t
CYC
I
active current (Store) (EE-
400
1
µA
µA
µA
CS = V , U/D = V or V and
IH IL IH
INC = V @ max. t
IH WR
CC
CC2
PROM Store)
I
Standby supply current
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
10
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
V
x 0.7
V + 0.5
CC
V
V
IH
CC
V
–0.5
V
x 0.1
CC
IL
(5)
C
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.
100,000
100
Unit
Data changes per bit
Years
Test Circuit #1
Test Circuit #2
Circuit #3 SPICE Macro Model
V /R
H
V /R
H
H
H
R
TOTAL
Test Point
R
R
L
H
C
L
C
W
C
V
S
H
Test Point
/R
10pF
V
/R
W
W
V
W
W
25pF
Force
Current
10pF
V /R
V /R
L
L
L
L
R
W
A.C. CONDITIONS OF TEST
Input pulse levels
0V to 3V
Input rise and fall times
Input reference levels
10ns
1.5V
Characteristics subject to change without notice. 5 of 13
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X9315
A.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified)
Limits
(6)
Symbol
Parameter
Min.
100
100
2.9
1
Typ.
Max.
Unit
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
CPH
ms
µs
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 power-up or power-down conditions of V
and the voltages applied to the
CC
potentiometer pins provided that V
is always more positive than or equal to V , V , and V , i.e., V
≥ V , V ,
CC
H
L
W
CC H L
V .The V ramp rate spec is always in effect.
W
CC
A.C. TIMING
CS
t
CYC
(Store)
t
t
t
t
t
CI
IL
IH
IC
CPH
90ꢀ 90ꢀ
10ꢀ
INC
U/D
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 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 13
REV 1.3.2 1/14/03
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X9315
PERFORMANCE CHARACTERISTICS (TYPICAL)
Typical Noise
ꢀ
-1ꢀ
-2ꢀ
-3ꢀ
-4ꢀ
-5ꢀ
-6ꢀ
-7ꢀ
-8ꢀ
-9ꢀ
-1ꢀꢀ
-11ꢀ
-12ꢀ
-13ꢀ
-14ꢀ
-15ꢀ
ꢀ
1ꢀ
2ꢀ 3ꢀ
4ꢀ 5ꢀ
6ꢀ 7ꢀ
8ꢀ 9ꢀ 1ꢀꢀ 11ꢀ 12ꢀ 13ꢀ 14ꢀ 15ꢀ 16ꢀ 17ꢀ 18ꢀ 19ꢀ 2ꢀꢀ
Frequency (kHz)
Typical Rtotal vs. Temperature
1ꢀꢀꢀꢀ
98ꢀꢀ
96ꢀꢀ
94ꢀꢀ
92ꢀꢀ
9ꢀꢀꢀ
88ꢀꢀ
86ꢀꢀ
84ꢀꢀ
82ꢀꢀ
8ꢀꢀꢀ
-55
-45
-35 -25 -15 -5
5
35 45
C°
95 1ꢀ5 115 125
15
25
55 65
75
85
Temperature
Typical Total Resistance Temperature Coefficient
ꢀ
-5ꢀ
-1ꢀꢀ
-15ꢀ
PPM
-2ꢀꢀ
-25ꢀ
-3ꢀꢀ
-35ꢀ
-55 -45 -35 -25 -15
-5
5
15
25
45
55
65
75
85
95 1ꢀ5 115 125 °C
Tem3p5erature
Characteristics subject to change without notice. 7 of 13
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X9315
Typical Wiper Resistance
8ꢀꢀ
7ꢀꢀ
6ꢀꢀ
5ꢀꢀ
4ꢀꢀ
3ꢀꢀ
2ꢀꢀ
1ꢀꢀ
ꢀ
ꢀ
2
4
6
8
1ꢀ
12
14
16
18
2ꢀ
22
24
26
28
3ꢀ
32
V
= 2.7V
CC
Tap
Typical Absolute0 Error per Tap Position
4ꢀ.ꢀ0
3ꢀ.ꢀ0
2ꢀ.ꢀ0
1ꢀ.ꢀ0
ꢀ.ꢀ0
-1ꢀ.ꢀ0
-2ꢀ.ꢀ0
-3ꢀ.ꢀ0
-4ꢀ.ꢀ0
ꢀ
3
6
9
12
15
18
21
24
27
3ꢀ
Tap
Typical Relative0 Error per Tap Position
2ꢀ.ꢀ0
15.ꢀ0
1ꢀ.ꢀ0
5.ꢀ0
ꢀ.ꢀ0
-5.ꢀ0
-1ꢀ.ꢀ0
-15.ꢀ0
-2ꢀ.ꢀ0
ꢀ
3
6
9
12
15
18
21
24
27
3ꢀ
Tap
Characteristics subject to change without notice. 8 of 13
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X9315
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
/R
W
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
+5V
1
+V
+V
LM308A
+V
V
+
–
S
+5V
V
O
V
OP-07
W
+
–
V
REF
–5V
X
V
OUT
R
/V
W
W
R
2
+V
–5V
= V /R
R
1
R
/V
W
V
W
OUT
W
W
(a)
(b)
V
= (1+R /R )V
2 1 S
O
Voltage Regulator
Comparator with Hysteresis
V
V (REG)
O
317
IN
LT311A
V
–
+
S
V
O
R
1
I
adj
R
2
R
R
1
2
V
V
= {R /(R +R )} V (max)
1 1 2 O
UL
LL
= {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. 9 of 13
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X9315
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. 10 of 13
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X9315
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. 11 of 13
REV 1.3.2 1/14/03
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X9315
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. 12 of 13
REV 1.3.2 1/14/03
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X9315
ORDERING INFORMATION
X9315X
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
M = 8-Lead MSOP
P = 8-Lead Plastic DIP
S = 8-Lead SOIC
End to End Resistance
W = 10KΩ
U = 50KΩ
T = 100K
P/N
MSOP Part Mark
X9315TM
X9315TM-2.7
X9315TMI
AEJ
AEI
ADZ
ADY
AEL
AEK
AEB
AEA
AAW
AAU
AAX
AAV
X9315TMI-2.7
X9315UM
X9315UM-2.7
X9315UMI
X9315UMI-2.7
X9315WM
X9315WM-2.7
X9315WMI
X9315WMI-2.7
Characteristics subject to change without notice. 13 of 13
REV 1.3.2 1/14/03
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相关型号：
X9315TMIZT1
Digitally Controlled Potentiometer (XDCP™); MSOP8, SOIC8; Temp Range: See Datasheet
RENESAS
X9315TMT1
Digital Potentiometer, 1 Func, 100000ohm, Increment/decrement Control Interface, 32 Positions, CMOS, PDSO8, MSOP-8
XICOR
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