®
X9116
Low Noise, Low Power, Low Cost
Data Sheet
September 26, 2006
FN8160.2
Digitally Controlled Potentiometer
(XDCP™)
The Intersil X9116 is a digitally controlled nonvolatile
potentiometer designed to be used in trimmer applications.
The pot consists of 15 equal resistor segments that connect
to the wiper pin through programmable CMOS switches. The
tap position is programmed through a 3-wire up/down serial
port. The last position of the wiper is stored in a nonvolatile
memory location which is recalled at the time of power up of
the device.
The wiper moves through sequential tap positions with
inputs on the serial port. A falling edge on INC (bar) causes
the tap position to increment one position up or down based
on whether the U/D (bar) pin is held high or low.
The X9116 can be used in many applications requiring a
variable resistance. In many cases it can replace a
mechanical trimmer and offers many advantages such as
temperature and time stability as well as the reliability of a
solid state solution.
Features
• Solid-state nonvolatile
• 16 wiper taps
• 3-wire up/down serial interface
• V
CC
= 2.7V and 5V
• Active current < 50µA max.
• Standby current < 1µA max.
• R
TOTAL
= 10kΩ
• Packages: 8 Ld MSOP, 8 Ld SOIC
• Pb-free plus anneal available (RoHS compliant)
Pinout
SOIC/MSOP
INC
U/D
V
H
/R
H
V
SS
1
2
3
4
X9116
8
7
6
5
V
CC
CS
V
L
/R
L
V
W
/R
W
Block Diagram
V
CC
(Supply Voltage)
Up/Down
(U/D)
Increment
(INC)
Device Select
(CS)
Control
and
Memory
R
H
/V
H
R
W
/V
W
R
L
/V
L
V
SS
(Ground)
General
R
H
13
*
3
2
1
R
L
0
R
W
-R
L
Resistance
15
14
10kΩ
9.34kΩ
8.68kΩ
* kΩ
2.08kΩ
1.42kΩ
760Ω
100Ω
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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. 2005-2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
X9116
Ordering Information
PART NUMBER
(BRAND)
X9116WM8T1
X9116WM8ZT1 (Note)
X9116WM8I*
X9116WM8IZ* (Note)
X9116WS8*
X9116WS8Z* (Note)
X9116WS8I*
X9116WS8IZ* (Note)
X9116WM8-2.7**
X9116WM8Z-2.7* (Note)
X9116WM8I-2.7*
X9116WM8IZ-2.7* (Note)
X9116WS8-2.7*
X9116WS8Z-2.7* (Note)
X9116WS8I-2.7*
X9116WS8IZ-2.7* (Note)
PART MARKING
AAZ
AKY
AFL
DCG
X9116W
X9116W Z
X9116W I
X9116W ZI
AFK
AOJ
ABA
AKS
X9116W F
X9116W ZF
X9116W G
X9116W ZG
-2.7-5.5
V
CC
LIMITS
(V)
5V ±10%
R
TOTAL
(kΩ)
10
TEMP. RANGE
(°C)
0 to +70
0 to +70
-40 to +85
-40 to +85
0 to +70
0 to +70
-40 to +85
-40 to +85
0 to +70
0 to +70
-40 to +85
-40 to +85
0 to +70
0 to +70
-40 to +85
-40 to +85
PACKAGE
PKG.
DWG. #
8 Ld MSOP Tape and Reel M8.118
8 Ld MSOP (Pb-free)
Tape and Reel
8 Ld MSOP
8 Ld MSOP (Pb-free)
8 Ld SOIC
8 Ld SOIC (Pb-free)
8 Ld SOIC
8 Ld SOIC (Pb-free)
8 Ld MSOP
8 Ld MSOP (Pb-free)
8 Ld MSOP
8 Ld MSOP (Pb-free)
8 Ld SOIC
8 Ld SOIC (Pb-free)
8 Ld SOIC
8 Ld SOIC (Pb-free)
M8.118
M8.118
M8.118
M8.15
M8.15
M8.15
M8.15
M8.118
M8.118
M8.118
M8.118
M8.15
M8.15
M8.15
M8.15
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.
*Add "T1" suffix for tape and reel.
**Add “T2” suffix for tape and reel.
Pin Descriptions
V
H
/R
H
and V
L
/R
L
The high (V
H
/R
H
) and low (V
L
/R
L
) terminals of the X9116
are equivalent to the fixed terminals of a mechanical
potentiometer. The minimum voltage is V
SS
and the
maximum is V
CC
.
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 X9116 will be placed in
the low power standby mode until the device is selected
once again.
V
W
/R
W
R
w
/R
w
is the wiper terminal and is equivalent to the 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 200Ω to
400Ω depending upon V
CC
.
Pin Descriptions
SYMBOL
VH/RH
VW/RW
VL/RL
VSS
VCC
U/D
INC
CS
High Terminal
Wiper Terminal
Low Terminal
Ground
Supply Voltage
Up/Down Control Input
Increment Control Input
Chip Select Input
DESCRIPTION
Up/Down (U/D)
The U/D input controls the direction of the wiper movement
and whether the counter is incremented (up) or decremented
(down).
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
FN8160.2
September 26, 2006
X9116
Principles of Operation
There are three sections of the X9116: 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 15 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 pin.
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 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
IW
(INC to V
W
change). The
R
TOTAL
value for the device can temporarily be reduced by
a significant amount if the wiper is moved several positions.
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.
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 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.
Mode Selection
CS
L
L
H
H
X
L
INC
U/D
H
L
X
X
X
Wiper Up
Wiper Down
Store Wiper Position
Standby Current
No Store, Return to Standby
MODE
Symbol Table
WAVEFORM
INPUTS
Must be
steady
May change
from Low to
High
May change
from High to
Low
Don’t Care:
Changes
Allowed
N/A
OUTPUTS
Will be
steady
Will change
from Low to
High
Will change
from High to
Low
Changing:
State Not
Known
Center Line
is High
Impedance
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 four
bit counter. The output of this counter is decoded to select
one of 16 wiper positions along the resistive array.
The value of the counter is stored in nonvolatile memory
whenever CS transitions HIGH while the INC input is also
HIGH.
The system may select the X9116, 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
recalls the previously stored data.
3
FN8160.2
September 26, 2006
X9116
Absolute Maximum Ratings
Temperature under bias . . . . . . . . . . . . . . . . . . . . . .-65°C to +135°C
Storage temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Voltage on CS, INC, U/D, V
H
/R
H
, V
L
/R
L
and V
CC
with respect to V
SS
. . . . . . . . . . . . . . . . . . . . . -1V to +7V
ΔV
= |V
H
/R
H
-V
L
/R
L
| . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V
Lead temperature (soldering, 10 seconds) . . . . . . . . . . . . . . +300°C
I
W
(10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±10.0mA
Recommended Operating Conditions
Temperature Range
Commercial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
Industrial. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C
Supply Voltage (V
CC
) Limits
X9116 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V ± 10%
X9116-2.7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
Potentiometer Specifications
Over recommended operating conditions unless otherwise stated
SYMBOL
R
TOTAL
V
VH
V
VL
PARAMETER
End to end resistance variation
V
H
/R
H
terminal voltage
V
L
/R
L
terminal voltage
Power rating
R
W
R
W
I
W
Wiper resistance
Wiper resistance
Wiper current
Noise
Resolution
Absolute linearity (Note 1)
Relative linearity (Note 2)
R
TOTAL
temperature coefficient
Ratiometric temperature coefficient
C
H
/C
L
/C
W
NOTES:
1. Absolute linearity is utilized to determine actual wiper voltage versus expected voltage = (V
w(n)
(actual) - V
w(n)
(expected)) = ±1 Ml Maximum.
2. Relative linearity is a measure of the error in step size between taps = V
W(n+1 )
-[V
w(n)
+ Ml] = ±0.2 Ml.
3. 1 Ml = Minimum Increment = R
TOT
/15.
Potentiometer capacitances
See Circuit #3
10/10/25
V
w(n)(actual)
- V
w(n)(expected)
V
w(n+1)
- [V
w(n) + MI
]
-1
-0.2
±300
±20
Ref: 1kHz
V
SS
= 0V
V
SS
= 0V
R
TOTAL
= 10kΩ
I
W
= 1mA, V
CC
= 5V
I
W
= 1mA, V
CC
= 2.7V
-5.0
-120
6
+1
+0.2
200
400
TEST CONDITIONS/NOTES
MIN
-20
V
SS
V
SS
TYP
MAX
+20
V
CC
V
CC
10
400
1000
+5.0
UNIT
%
V
V
mW
Ω
Ω
mA
dBV√Hz
%
MI (Note 3)
MI (Note 3)
ppm/°C
ppm/°C
pF
4
FN8160.2
September 26, 2006
X9116
DC Electrical Specifications
SYMBOL
I
CC1
I
CC2
I
SB
I
LI
V
IH
V
IL
Over recommended operating conditions unless otherwise specified
TEST CONDITIONS
CS = V
IL
, U/D = V
IL
or V
IH
and
INC = 0.4V/2.4V @ max t
CYC
CS = V
IH
, U/D = V
IL
or V
IH
and
INC = V
IH
@ max t
WR
CS = V
CC
– 0.3V, U/D and INC = V
SS
or
V
CC
– 0.3V
V
IN
= V
SS
to V
CC
2V
-0.5
V
CC
= 5V, V
IN
= V
SS
, T
A
= 25°C,
f = 1MHz
MIN TYP (Note 4)
MAX
150
400
1
±10
V
CC
+ 0.5
0.8
10
UNIT
µA
µA
µA
µA
V
V
pF
PARAMETER
V
CC
active current (Increment)
VCC active current (Store) (EEPROM Store)
Standby supply current
CS, INC, U/D input leakage current
CS, INC, U/D input HIGH voltage
CS, INC, U/D input LOW voltage
C
IN
(Note 5) CS, INC, U/D input capacitance
4. Typical values are for T
A
= +25°C and nominal supply voltage.
5. This parameter is periodically sampled and not 100% tested.
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
H
/R
H
V
H
/R
H
R
H
R
TOTAL
C
W
25pF
10pF
R
W
C
L
10pF
R
L
V
S
Test Point
V
W
/R
W
V
L
/R
L
V
W
VW
/R
W
V
L
/R
L
Test Point
Force
Current
C
H
A.C. Conditions of Test
Input pulse levels
Input rise and fall times
Input reference levels
0V to 3V
10ns
1.5V
5
FN8160.2
September 26, 2006
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