DATASHEET
X9015
Low Noise, Low Power, Volatile 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.
FN8157
Rev 6.00
August 14, 2015
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
= 10k, 50k
• 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
3
4
X9015
8
7
6
5
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
FN8157 Rev 6.00
August 14, 2015
Page 1 of 12
X9015
Ordering Information
PART NUMBER
PART
MARKING
V
CC
LIMITS (V)
5 ±10%
R
TOTAL
(k)
10
TEMPERATURE
RANGE (°C)
0 to +70
PACKAGE
(RoHS Compliant)
8 Ld SOIC
Tape and Reel
PKG.
DWG. #
M8.15
X9015W Z
X9015WS8ZT1 (Note)
(No longer available,
recommended replacement:
X9015US8ZT1)
X9015UM8Z (Note)
X9015UM8IZ* (Note)
X9015US8Z* (Note)
X9015US8IZ* (Note)
DCF
DCD
X9015U Z
X9015U Z I
0 to +70
-40 to +85
0 to +70
-40 to +85
2.7-5.5
10
0 to +70
8 Ld MSOP
8 Ld MSOP
8 Ld SOIC
8 Ld SOIC
8 Ld SOIC
M8.118
M8.118
M8.15
M8.15
M8.15
X9015W ZF
X9015WS8Z-2.7* (Note)
(No longer available,
recommended replacement:
X9015US8Z-2.7)
X9015UM8Z-2.7* (Note)
X9015UM8IZ-2.7* (Note)
X9015US8Z-2.7* (Note)
X9015US8IZ-2.7* (Note)
DCF
DCE
X9015U ZF
X9015U ZG
50
0 to +70
-40 to +85
0 to +70
-40 to +85
8 Ld MSOP
8 Ld MSOP
8 Ld SOIC
8 Ld SOIC
M8.118
M8.118
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.
FN8157 Rev 6.00
August 14, 2015
Page 2 of 12
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 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 200 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
L
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
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.
The wiper, when at either fixed terminal, acts like its mechanical
equivalent and does not move beyond the last position. That is,
FN8157 Rev 6.00
August 14, 2015
Page 3 of 12
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
V
= |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
1k
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
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.
FN8157 Rev 6.00
August 14, 2015
Page 4 of 12
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
R
TOTAL
Test Point
R
H
C
H
C
W
25pF
10pF
R
W
C
L
10pF
R
L
V
H
/R
H
V
H
/R
H
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
FN8157 Rev 6.00
August 14, 2015
Page 5 of 12
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