®
X9015
Low Noise, Low Power, Volatile
Data Sheet
August 31, 2006
FN8157.5
Single Digitally Controlled (XDCP™)
Potentiometer
The Intersil X9015 is a 32 tap potentiometer that is volatile.
The device consists of a string of 31 resistors that can be
programmed to connect the R
W
/V
W
wiper output with any of
the nodes between the connecting resistors. The connection
point of the wiper is determined by information
communicated to the device on the 3-wire port. The 3-wire
port changes the tap position by a falling edge on the
increment pin. The direction the wiper moves is determined by
the state of the up/down pin. The wiper position at power up is
Tap #15.
The X9015 can be used in a wide variety of applications that
require a digitally controlled variable resistor to set analog
values.
Features
• 32 taps
• Three-wire up/down serial interface
• V
CC
= 2.7V–5V
• Operating I
CC
= 50µA max.
• Standby current = 1µA max.
• R
TOTAL
= 10kΩ, 50kΩ
• Packages 8 Ld SOIC, 8 Ld MSOP
• Pb-free plus anneal available (RoHS compliant)
Pinout
SOIC/MSOP
INC
U/D
R
H
/V
H
V
SS
1
2
X9015
3
4
6
5
8
7
V
CC
CS
R
L
/V
L
R
W
/V
W
Block Diagram
V
CC
(Supply Voltage)
U/D
INC
CS
5-Bit
Up/Down
Counter
31
30
29
One 28
of
Thirty
Two
Decoder
2
R
H
/V
H
Up/Down
(U/D)
Increment
(INC)
Device Select
(CS)
Control
R
H
/V
H
R
W
/V
W
R
L
/V
L
Transfer
Gates
Resistor
Array
V
SS
(Ground)
General
V
CC
V
SS
Control
Circuitry
1
0
R
L
/V
L
R
W
/V
W
Detailed
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|
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.
X9015
Ordering Information
PART NUMBER
X9015WS8T1
X9015WS8ZT1 (Note)
X9015UM8
X9015UM8Z (Note)
X9015UM8I*
X9015UM8IZ* (Note)
X9015US8*
X9015US8Z* (Note)
X9015US8I*
X9015US8IZ* (Note)
X9015WS8-2.7*
X9015WS8Z-2.7* (Note)
X9015UM8-2.7*
X9015UM8Z-2.7* (Note)
X9015UM8I-2.7*
X9015UM8IZ-2.7* (Note)
X9015US8-2.7*
X9015US8Z-2.7* (Note)
X9015US8I-2.7*
X9015US8IZ-2.7* (Note)
PART MARKING
X9015W
X9015W Z
ABB
DCF
ABD
DCD
X9015U
X9015U Z
X9015U I
X9015U Z I
X9015W F
X9015W ZF
ABC
DCF
ABE
DCE
X9015U F
X9015U ZF
X9015U G
X9015U ZG
50
2.7-5.5
10
50
V
CC
LIMITS (V)
5 ±10%
R
TOTAL
(kΩ)
10
TEMPERATURE
RANGE (°C)
0 to +70
0 to +70
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
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
8 Ld SOIC
Tape and Reel
8 Ld SOIC (Pb-free)
Tape and Reel
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)
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)
PKG.
DWG. #
M8.15
M8.15
M8.118
M8.118
M8.118
M8.118
M8.15
M8.15
M8.15
M8.15
M8.15
M8.15
M8.118
M8.118
M8.118
M8.118
M8.15
M8.15
M8.15
M8.15
* Add “T1” suffix for tape and reel.
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.
2
FN8157.5
August 31, 2006
X9015
Pin Descriptions
R
H
/V
H
and R
L
/V
L
The high (R
H
/V
H
) and low (R
L
/V
L
) terminals of the X9015 are
equivalent to the fixed terminals of a mechanical
potentiometer. The minimum voltage is V
SS
and the
maximum is V
CC
. The terminology of R
L
/V
L
and R
H
/V
H
references the 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.
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 wiper position is lost.
When power is restored, the wiper is set to Tap #15.
R
W
/V
W
R
W
/V
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 at
V
CC
=5V. At power up the wiper position is at Tap #15.
(V
L
/R
L
=Tap #0).
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.
The system may select the X9015, move the wiper and
deselect the device. The new wiper position will be maintained
until changed by the system or until a power-up/down cycle.
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.
Up/Down (U/D)
The U/D input controls the direction of the wiper movement
and whether the tap position 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.
Chip Select (CS)
The device is selected when the CS input is LOW. When CS
is returned HIGH while the INC input is also HIGH the X9015
will be placed in the low power standby mode until the device
is selected once again.
Mode Selection
CS
L
INC
U/D
H
L
H
H
X
L
X
X
X
MODE
Pin Names
SYMBOL
RH/VH
RW/VW
RL/VL
VSS
VCC
U/D
INC
CS
High terminal
Wiper terminal
Low terminal
Ground
Supply voltage
Up/Down control input
Increment control input
Chip select control input
DESCRIPTION
Wiper up
Wiper down
Standby mode
Standby mode
Normal mode
Wiper Up (not recommended)
Wiper Down (not recommend-
ed)
L
L
L
L
H
L
Principles Of Operation
There are two sections of the X9015: the input control,
counter and decode section; 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. The resistor array is comprised of 31 individual
resistors connected in series.
3
FN8157.5
August 31, 2006
X9015
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
, V
L
and
V
CC
with respect to V
SS
. . . . . . . . . . . . . . . . . . . . . . . . -1V to +7V
ΔV
= |V
H
–V
L
| . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5V
Lead temperature (soldering 10s) . . . . . . . . . . . . . . . . . . . . . +300°C
I
W
(10s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±7.5mA
Operating Conditions
Temperature Range
Commercial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
Industrial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C
Supply Voltage (V
CC
)
X9015. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5V ±10%
X9015-2.7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
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
R
TOTAL
≤1kΩ
I
W
= 1mA, V
CC
= 5V
I
W
= 1mA, V
CC
= 2.7V
-3.75
-120
3
+1
+0.2
200
400
TEST CONDITIONS/NOTES
MIN.
–20
0
0
TYP.
MAX.
+20
V
CC
V
CC
10
400
1000
3.75
UNIT
%
V
V
mW
Ω
Ω
mA
dBV
%
MI (Note 3)
MI (Note 3)
ppm/°C
ppm/°C
pF
Power Up and Down Requirements
The are no restrictions on the power-up or power-down conditions of V
CC
and the voltages applied to the potentiometer pins
provided that V
CC
is always more positive than or equal to V
H
, V
L
, and V
W
, i.e., V
CC
≥
V
H
, V
L
, V
W
. The V
CC
ramp rate spec is
always in effect.
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
/31.
4. Typical values are for T
A
= +25°C and nominal supply voltage.
5. This parameter is periodically sampled and not 100% tested.
4
FN8157.5
August 31, 2006
X9015
)
D.C. Operating Specifications
Over recommended operating conditions unless otherwise specified
SYMBOL
I
CC1
I
CC2
I
SB
I
LI
V
IH
V
IL
C
IN
(Note 5)
PARAMETER
VCC 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
CS, INC, U/D input capacitance
V
CC
= 5V, V
IN
= V
SS
, T
A
= 25°C,
f = 1MHz
TEST CONDITIONS
CS = V
IL
, U/D = V
IL
or V
IH
and
INC = 0.4V @ 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
V
CC
x 0.7
-0.5
MIN.
TYP.
(Note 4)
MAX.
50
400
1
±10
V
CC
+ 0.5
V
CC
x 0.1
10
UNITS
µA
µA
µA
µA
V
V
pF
TEST CIRCUIT #1
TEST CIRCUIT #2
CIRCUIT #3 SPICE MACRO MODEL
V
H
/R
H
V
H
/R
H
Test Point
R
H
C
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
L
/R
L
V
L
V
W
VW/R
W
Force
Current
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
A.C. Conditions of Test
Input pulse levels
Input rise and fall times
Input reference levels
0V to 3V
10ns
1.5V
5
FN8157.5
August 31, 2006
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