X93155UM8I [INTERSIL]
Digitally Controlled Potentiometer (XDCP); 数控电位器（ XDCP ）
| 型号： | X93155UM8I |
| 厂家： | 
Intersil |
| 描述： | Digitally Controlled Potentiometer (XDCP) |
| 文件： | 总8页 (文件大小：246K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
X93155
®
Data Sheet
September 26, 2005
FN8181.1
Digitally Controlled Potentiometer
(XDCP™)
Features
• Solid-state potentiometer
The Intersil X93155 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.
• Up/Down interface
• 32 wiper tap points per potentiometer
- Wiper position stored in nonvolatile memory and
recalled on power-up
The potentiometer is implemented by a resistor array
composed of 31 resistive elements and a wiper switching
network. 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 per potentiometer
- Temperature compensated
- Maximum resistance tolerance ±25%
- Terminal voltage, 0 to V
CC
• Low power CMOS
The device is connected as a two-terminal variable resistor
and can be used in a wide variety of applications including:
- V = 5V±10%
CC
- Active current, 200µA typ.
- Standby current, 2.0µA max
- Bias and Gain Control
- LCD Contrast Adjustment
• High reliability
- Endurance 200,000 data changes per bit
- Register data retention, 100 years
Ordering Information
• R
TOTAL
value = 50kΩ
PART
PART
R
TEMP
TOTAL
• Packages
NUMBER
MARKING
(kΩ)
RANGE (°C) PACKAGE
- 8 Ld MSOP
X93155UM8I*
AGM
DCH
50
50
-40 to 85 8 Ld MSOP
• Pb-free plus anneal available (RoHS compliant)
X93155UM8IZ*
(Note)
-40 to 85 8 Ld MSOP
(Pb-free)
Pinout
*Add "T1" suffix for tape and reel.
X93155
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
(8 LD MSOP)
TOP VIEW
8
7
6
5
INC
U/D
1
2
3
4
V
CC
CS
R
H
R
L
1
V
NC
SS
1
NC can be left unconnected, or connected to any voltage between V
SS
and V
CC.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1
1-888-INTERSIL or1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
X93155
Block Diagram
V
(Supply Voltage)
CC
U/D
INC
CS
5-Bit
Up/Down
Counter
R
31
H
30kΩ
30
29
28
R
H
Up/Down
(U/D)
5-Bit
Nonvolatile
Memory
Control
Increment
(INC)
One
of
Thirty
Two
and
Memory
Transfer
Gates
Resistor
Array
Device Select
(CS)
Store and
Control
Recall
Decoder
2
Circuitry
R
L
1
0
V
V
CC
SS
V
(Ground)
SS
R
L
General
Detailed
Pin Descriptions
MSOP
SYMBOL
BRIEF DESCRIPTION
1
INC
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.
2
U/D
Up/Down (U/D). The U/D input controls the direction of the wiper movement and whether the counter is incremented or
decremented.
3
4
5
6
7
R
R . The R and R pins of the X93155 are equivalent to the end terminals of a variable resistor.
H
H
H
L
V
Ground.
SS
NC
No Connection. (or can be connected to any voltage between V and V .)
SS CC
R
R . The R and R pins of the X93155 are equivalent to the end terminals of a variable resistor.
L H L
L
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 X93155
will be placed in the low power standby mode until the device is selected once again.
8
V
Supply Voltage.
CC
FN8181.1
2
September 26, 2005
X93155
Absolute Maximum Ratings
Recommended Operating Conditions
Temperature under bias. . . . . . . . . . . . . . . . . . . . . .-65°C to +135°C
Temperature Range
Storage temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Industrial. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C
Voltage on CS, INC, U/D, R , R and V
Supply Voltage
H
L
CC
(7)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5V ±10%
with respect to V
. . . . . . . . . . . . . . . . . . . . . . . . . .-1V to +6.5V
V
CC
SS
Lead temperature (soldering 10 seconds) . . . . . . . . . . . . . . . .300°C
Maximum reflow temperature (40 seconds). . . . . . . . . . . . . . .240°C
Maximum resistor current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2mA
CAUTION: 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.
Potentiometer Specifications Over recommended operating conditions unless otherwise stated.
SYMBOL
PARAMETER
End to end resistance
R , R terminal voltages
TEST CONDITIONS/NOTES
MIN
37.5
0
TYP
MAX
UNIT
kΩ
R
50
62.5
TOT
V
V
V
R
H
L
CC
1
(6)
Power rating
Noise
R
=50kΩ
mW
TOTAL
(6)
Ref: 1kHz
(5)
-120
3
dBV
I
Potentiometer Current
Resolution
0.6
mA
%
R
(1)
(3)
Absolute linearity
R -R
H(n)(actual) H(n)(expected)
±1
MI
(2)
(3)
MI
Relative linearity
R
-[R
]
±0.5
H(n+1) H(n)+MI
R
temperature coefficient
(6)
±35
ppm/°C
TOTAL
Potentiometer capacitances
(6)
C /C /C
W
See circuit #2
10/10/25
pF
H
L
Notes: (1) Absolute linearity is utilized to determine actual wiper resistance versus expected resistance = (R
Ml Maximum. n = 1 .. 29 only
(actual)-R
(expected)) = ±1
H(n)
H(n)
(2) Relative linearity is a measure of the error in step size between taps = R
—[R
+ Ml] = ±0.5 Ml, n = 1 .. 29 only.
H(n)
H(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 100% tested
(6) This parameter is not 100% tested.
(7) When performing multiple write operations, V
must not decrease by more than 150mV from its initial value.
CC
DC Electrical Specifications Over recommended operating conditions unless otherwise specified.
(4)
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
I
V
V
active current (Increment)
CS = V , U/D = V or V and
200
300
µA
CC1
CC
CC
IL IL IH
INC = 0.4V @ max. t
CYC
I
active current (Store)
(EEPROM Store)
CS = V , U/D = V or V and
IH IL IH
1400
2.0
µA
µA
CC2
INC = V @ max. t
IH
WR
- 0.3V, U/D and INC = V
SS
I
Standby supply current
CS = V
SB
CC
- 0.3V
or V
CC
I
I
I
CS
V
V
V
= V
±1
250
±1
µA
µA
µA
V
LI
LI
LI
CS
CC
= 5V, CS = 0
= V to V
CS
120
200
CC
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
IN
SS
CC
V
V
x 0.7
V
+ 0.5
IH
CC
-0.5
CC
V
V
x 0.1
V
IL
(5)(7)
CC
10
C
V
= 5V, V = V , T = 25°C,
IN SS
pF
IN
CC
A
f = 1MHz
FN8181.1
3
September 26, 2005
X93155
Circuit #2 SPICE Macro Model
Endurance and Data Retention
PARAMETER
Minimum endurance
Data retention
MIN
200,000
100
UNIT
Data changes per bit
Years
R
TOTAL
R
R
L
H
C
L
C
W
C
H
10pF
Test Circuit #1
25pF
Test Point
10pF
V /R
H
H
A.C. Conditions of Test
Input pulse levels
0V to 5V
Input rise and fall times
Input reference levels
10ns
1.5V
AC Electrical Specifications Over recommended operating conditions unless otherwise specified.
(6)
SYMBOL
PARAMETER
MIN
100
100
100
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
ns
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 cycle time
1
µs
t
t
t
250
10
2
ns
CPH
CPH
CYC
ms
µs
(6)
t
t
INC input rise and fall time
500
10,000
10
µs
R, F
(6)
t
V
V
power-up rate
1
V/ms
ms
R
CC
CC
Store cycle
t
5
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
CC
positive than or equal to V and V , i.e., V ≥ V V . The
CC H, L
H
L
V
ramp rate spec is always in effect.
CC
FN8181.1
September 26, 2005
4
X93155
A.C. Timing
CS
t
CYC
(Store)
t
t
t
t
t
CPH
CI
IL
IH
IC
90%
90%
INC
U/D
10%
t
t
t
t
R
ID
DI
F
point to the wiper. The wiper is connected to the R terminal,
Pin Descriptions
L
forming a variable resistor from R to R .
H
L
R and R
H
L
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 R and R pins of the X93155 are equivalent to the end
H
L
terminals of a variable resistor. The minimum voltage is V
SS
and the maximum is V . The terminology of R and R
CC
H
L
references the relative position of the terminal in relation to
wiper movement direction selected by the U/D input.
If the wiper is moved several positions, multiple taps are
connected to the wiper for up to 10µs. The 2-terminal
resistance value for the device can temporarily change by a
significant amount if the wiper is moved several positions.
Up/Down (U/D)
The U/D input controls the direction of the wiper movement
and whether the counter is incremented or decremented.
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.
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.
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 five
bit counter. The output of this counter is decoded to select
one of thirty two wiper positions along the resistive array.
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 X93155 will be placed in
the low power standby mode until the device is selected
once again.
The value of the counter is stored in nonvolatile memory
whenever CS transitions HIGH while the INC input is also
HIGH. In order to avoid an accidental store during power-up,
Principles of Operation
There are three sections of the X93155: 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
CS must go HIGH with V
during initial power-up. When
CC
left open, the CS pin is internally pulled up to V
by an
CC
internal 30kΩ resistor.
The system may select the X93155, 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
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
FN8181.1
5
September 26, 2005
X93155
changed by the system or until a power-up/down cycle
recalled the previously stored data. In order to recall the
stored position of the wiper on power-up, the CS pin must be
held HIGH.
Symbol Table
WAVEFORM
INPUTS
OUTPUTS
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, or other system
trim requirements.
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 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.
Don’t Care:
Changes
Allowed
Changing:
State Not
Known
N/A
Center Line
is High
Impedance
Mode Selection
CS
INC
U/D
H
L
MODE
L
Wiper Up
Applications Information
L
Wiper Down
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.
H
X
L
L
L
X
Store Wiper Position
H
X
Standby Current
X
No Store, Return to Standby
Wiper Up (not recommended)
Wiper Down (not recommended)
H
L
V
R
I
Two terminal variable resistor.
Low Voltage High Impedance Instrumentation Amplifier
5V
10K
+
+
10K
50K
U1A
-
50K
-
V
U1C
OUT
V
IN
X93155 (R
)
TOTAL
+
50K
50K
10K
50K
)
(
GAIN =
1 +
-
R
10K
TOTAL
U1B
U1 = LT1467
10K
+
-
50K
FN8181.1
6
September 26, 2005
X93155
Micro-Power LCD Contrast Control
5V
300K
240K
100K
5V
100K
50K + R
+
)
(
1 +
100K
V
V
= -4.41
OUT
TOTAL
U1A
-
= -8.82V TO -13.23V
OUT
-
U1B
-15V
U1 = LMC6042
+
100K
50K
X93155(R
)
TOTAL
Single Supply Variable Gain Amplifier
5V
5V
U1
20K
20K
+
V
OUT
R
-
TOTAL
10K
GAIN =
U1 = LMC6042
V
IN
X93155
(R
10K
)
TOTAL
FN8181.1
7
September 26, 2005
X93155
MSOP 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
0.0256 (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)
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
FN8181.1
8
September 26, 2005
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