Terminal Voltage ±2.7V to ±5V, 128 Taps,
Up/Down Interface
The Intersil ISL95710 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 Up/Down interface.
The potentiometer is implemented by a resistor array
composed of 127 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.
The device can be used as a three-terminal potentiometer or
as a two-terminal variable resistor in a wide variety of
applications including:
• Industrial and automotive control
• Parameter and bias adjustments
• Amplifier bias and control
Pinout
ISL95710
(10 LD MSOP)
TOP VIEW
Features
• Non-V ol a ti l e So li d - State Po te ntiometer
• Up/Down Interface with Chip Select Enable
• DCP Terminal Voltage ±2.7V to ±5.5V
• 128 Wiper Tap Poin ts
- Wiper position stored in nonvolatile memory and
recalled on power-up
• 127 Resistive Elements
- Typical R
- End to end resistance range ±20%
• Low Power CMOS
- Standby current, 1µA
- Active current, 3mA max
= 2.7V to 5.5V
-V
CC
- V- = -2.7V to -5.5V
• High Reliability
- Endurance, 200,000 data changes per bit
- Register data retention, 50 years
•R
Values = 10kΩ, 50kΩ
TOTAL
• Package
-10 Ld MSOP
- Pb-free plus anneal (RoHS compliant)
tempco = ±50ppm/°C
TOTAL
FN8240.3
U/D
GND
CS
NC
1
V-
2
3
4
5
INC
10
VCC
9
R
8
L
R
W
7
R
6
H
Ordering Information
PART NUMBER
(Notes 1, 2)PART MARKING
ISL95710WIU10ZAKR10k-40 to +8510 Ld MSOPM10.118
ISL95710UIU10ZAKP50k-40 to +8510 Ld MSOPM10.118
NOTES:
1. Add “-T” suffix for tape and reel.
2. 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.
RESISTANCE OPTION
(Ω)
TEMP. RANGE
(°C)
PACKAGE
(Pb-Free)PKG. DWG. #
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
XDCP is a trademark of Intersil, Inc. Copyright Intersil Americas Inc. 2005, 2006. All Rights Reserved
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
All other trademarks mentioned are the property of their respective owners.
Page 2
Block Diagram
www.BDTIC.com/Intersil
ISL95710
V- (ANALOG VOLTAGE)
UP/DOWN
(U/D
INCREMENT
(INC
DEVICE SELECT
(CS
)
CONTROL
)
MEMORY
)
GND (GROUND)
GENERAL
AND
U/D
V
CC
R
H
R
W
R
L
INC
CS
VGND
7-BIT
UP/DOWN
COUNTER
7-BIT
NONVOLATILE
MEMORY
STORE AND
RECALL
CONTROL
CIRCUITRY
DECODER
Pin Descriptions
PIN NUMBERSYMBOLDESCRIPTION
1U/DControls the direction of wiper movement and whether the counter is incremented or decremented
2V-Negative bias voltage for the potentiometer wiper control
3GNDGround
4CS
5NCNo Connect. Pin is to be left unconnected
6R
7R
8R
H
W
L
9VCCPositive logic supply voltage
10INC
Chip select. The device is selected when the CS input is LOW. Also used to initiate a nonvolatile store
A fixed terminal for one end of the potentiometer resistor
The wiper terminal which is equivalent to the movable terminal of a potentiometer
A fixed terminal for one end of the potentiometer resistor
Increment input; negative edge triggered
ONE
OF
128
127
126
125
124
2
1
0
DETAILED
TRANSFER
GATES
RESISTOR
ARRAY
R
H
R
L
R
W
2
FN8240.3
August 31, 2006
Page 3
ISL95710
www.BDTIC.com/Intersil
Absolute Maximum RatingsThermal Information
Temperature under bias. . . . . . . . . . . . . . . . . . . . . .-65°C to +135°C
CAUTION: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only; 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.
NOTE:
3. θ
JA
Analog SpecificationsOver recommended operating conditions unless otherwise stated.
SYMBOLPARAMETERTEST CONDITIONSMIN
R
TOTAL
TC
(Note 12, 13)
V
RH,VRLRH,RL
R
C
H/CL/CW
(Note 13)
I
LkgDCP
VOLTAGE DIVIDER MODE (V- @ R
INL
(Note 6)
DNL
(Note 5)
ZSerror
(Note 3)
FSerror
(Note 4)
TC
(Notes 7, 13)
RESISTOR MODE (Measurements between R
RINL
(Note 11)
RDNL
(Note 10)
Roffset
(Note 9)
, INC, U/D and VCC
(RH)-V(RL)
is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
CS to INC setup100ns
INC HIGH to U/D change100ns
U/D to INC setup1µs
INC LOW period1µs
INC HIGH period1µs
INC inactive to CS inactive1µs
CS
deselect time (STORE)20ms
CS deselect time (NO STORE)1µs
= 5V ±10%, TA = Full Operating Temperature Range unless otherwise stated
CC
4
FN8240.3
August 31, 2006
Page 5
ISL95710
www.BDTIC.com/Intersil
AC Electrical SpecificationsV
SYMBOLPARAMETERMINTYP (Note 1)MAXUNIT
tIW INC to RW change100500µs
t
CYC
INC input rise and fall time500µs
t
R, tF
NOTES:
1. Typical values are for T
2. LSB: [V(R
incremental voltage when changing from one tap to an adjacent tap.
3. ZS error = (V(R
4. FS error = [V(R
5. DNL = [V(R
6. INL = V(R
TC
7.
for i = 16 to 120 decimal. Max ( ) is the maximum value of the wiper voltage and Min ( ) is the minimum value of the wiper voltage over the
temperature range.
8. MI =
9. Roffset = R
Roffset = R
10. RDNL = (R
11. RINL = [R
12.
for i = 16 to 127, T = -40°C to +85°C. Max ( ) is the maximum value of the resistance and Min ( ) is the minimum value of the resistance over
the temperature range.
13. This parameter is not 100% tested.
14. t
CPHS
the self-timed internal non-volatile write cycle. No CS
---------------------------------------------------------------------------------------------- x
V
|R
127
TC
R
is the minimum cycle time to be allowed for any non-volatile Write by the user. It is the time from a valid STORE condition to the end of
]/LSB-1, for i = 1 to 127. i is the DCP register setting.
i-1
i
()+[]2⁄
i
and R0 are the measured resistances for the DCP register set to 7F hex and 00 hex respectively.
127
)/MI -1, for i = 16 to 127.
= 5V ±10%, TA = Full Operating Temperature Range unless otherwise stated (Continued)
CC
and V(RW)0 are V(RW) for the DCP register set to 7F hex and 00 hex respectively . LSB is the
127
()–
---------------- -
×=
125°C
10
i
i
6
6
10
---------------- -=
125°C
or INC changes should be allowed.
Symbol Table
WAVEFORMINPUTSOUTPUTS
Must be steadyWill be steady
May change from Low to HighWill change from Low to High
May change from High to Low
Don’t Care: Changes AllowedChanging: State Not Known
N/A
5
Will change from High to Low
Center Line is High Impedance
FN8240.3
August 31, 2006
Page 6
A.C. Timing
C
www.BDTIC.com/Intersil
CS
t
CI
INC
ISL95710
t
CYC
t
IL
t
IH
t
IC
t
CPHS
90%90%
10%
t
CPHNS
t
ID
U/D
t
IW
R
W
NOTE (1): MI IN THE TIMING DIAGRAM REFERS TO THE MINIMUM INCREMENTAL CHANGE IN THE WIPER POSITION.
Typical Performance Curves
120
Irw=0.6mA
100
80
60
40
WIPER RESISTANCE (Ω)
20
0
020406080100120
TAP POS I TI O N (D E CI MAL)
FIGURE 1. WIPER RESISTANCE vs T AP POSITION
[I(RW) = V
CC/RTOTAL
] for 10kΩ (W)
T= 85ºC
T=25ºC
T= -40ºC
t
DI
(1)
MI
0.6
t
F
t
R
T = 85ºC
0.5
T = 25ºC
Isb (µA)
0.4
T = -40º
0.3
2.73.23.74.24.75.2
Vcc, V
FIGURE 2. STANDBY I
CC
vs V
CC
0.2
0.2
Vrh=5.5V, Vrl=-5.5V
0.1
0
DNL (LSB)
-0. 1
Vrh=2.7V, Vrl=-2.7V
-0. 2
020406080100120
TAP PO S I T I O N (D E C I MAL)
FIGURE 3. DNL vs TAP POSITION IN VOLTAGE DIVIDER
0.1
0
INL (LSB)
-0. 1
-0. 2
0 20406080100120
FIGURE 4. INL vs TAP POSITION IN VOL TAGE DIVIDER
MODE FOR 10kΩ (W)
6
Vrh=2.7V, Vrl=-2.7V
TAP POSITION (DECIM AL)
MODE FOR 10kΩ (W)
Vrh=5.5V, Vrl=-5.5V
August 31, 2006
FN8240.3
Page 7
Typical Performance Curves (Continued)
k
www.BDTIC.com/Intersil
ISL95710
1.6
Vrh= 2.7V, Vrl= -2 . 7 V, 1 0 k
1.2
0.8
Vrh=5.5V, Vrl=-5.5V, 10k
ZSerror (LSB)
0.4
0
-40-200 20406080
TEMPERATURE ( C)
FIGURE 5. ZSerror vs TEMPERATURE
0.1
T=25ºC
0.05
Vcc=2.7V, V-= -2 . 7 V
0
-0. 4
Vrh=5.5V, Vrl=-5.5V, 10
-0. 8
-1. 2
FSerror (LSB)
-1. 6
-2
-40-2002040608 0
TEMPERATURE (C)
FIGURE 6. FSerror vs TEMPERATURE
1
T=25º
0.8
0.6
Vrh=2.7V, Vrl=-2.7V, 10k
Vcc=2.7V, V-=-
0
RDNL (LSB)
-0.05
Vcc=5.5V, V-= -5 . 5 V
-0.1
0 20406080100120
TAP PO SIT I ON (D E C I MAL )
FIGURE 7. DNL vs TAP POSITION IN RHEOST A T MODE FOR
1
0.5
CHANGE (%)
0
TOTAL
-0. 5
-1
END TO END R
FIGURE 9. END TO END R
10kΩ (W)
Idcp= 0.57m A
Idcp= 1.16m A
-40-2 0020406080
TEMPERATURE (ºC)
% CHANGE vs
TEMPERATURE
TOTAL
0.4
0.2
RINL (LSB)
0
-0.2
050100
TAP POSITION (DECIM AL)
FIGURE 8. INL vs TAP POSITION IN RHEOST AT MODE FOR
10kΩ (W)
100
80
60
40
TCv (ppm/°C)
20
0
1636567696116
TAP PO SIT ION ( D E C I MAL )
FIGURE 10. TC FOR VOLTAGE DIVIDER MODE IN ppm
Vcc=5.5V, V-=-
10k
50k
7
FN8240.3
August 31, 2006
Page 8
Typical Performance Curves (Continued)
www.BDTIC.com/Intersil
200
10k
150
100
TCr (ppm/°C)
50
50k
0
1636567696
TAP PO S IT IO N (D E CI MAL)
FIGURE 11. TC FOR RHEOSTAT MODE IN ppm
ISL95710
FIGURE 12. FREQUENCY RESPONSE (1.8MHz)
FIGURE 13. WIPER MOVEMENT
Power Up and Down Requirements
In order to prevent unwanted tap position changes, or an
inadvertent store, bring the CS
concurrently with the V
potentiometer voltages must be applied after this sequence
is completed. During power-up, the data sheet parameters
for the DCP do not fully apply until 1ms after V
final value. The V
CC
ramp spec is always in effect.
CC
and INC high before or
pin on power-up. The
CC
reaches its
Pin Descriptions
RH and R
The high (R
equivalent to the fixed terminals of a mechanical
potentiometer. The terminology of R
relative position of the terminal in relation to wiper movement
direction selected by the U/D
potential on the terminal.
L
) and low (RL) terminals of the ISL95710 are
H
and RH references the
L
input and not the voltage
8
FIGURE 14. LARGE SIGNAL SETTLING TIME
R
W
Rw 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 wiper counter.
Up/Down (U/D)
The U/D input controls the direction of the wiper movement and
whether the wiper counter is incriminated or decremented.
Increment (INC)
The INC input is negative-edge triggered. Toggling INC will
move the wiper and either increment or decrement the wiper
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. The
current wiper counter value is stored in nonvolatile memory
when CS
After the store operation is complete the ISL95710 will be
is returned HIGH while the INC input is also HIGH.
FN8240.3
August 31, 2006
Page 9
ISL95710
www.BDTIC.com/Intersil
placed in the low power standby mode until the device is
selected once again.
Principles of Operation
There are three sections of the ISL95710: the input control,
wiper counter and decode section; the nonvolatile memory;
and the resistor array. The input control section operates as
an up/down counter. The output of this wiper counter is
decoded to turn on a electronic switch connecting a point on
the resistor array to the wiper output. The contents of the
wiper counter can be stored in nonvolatile memory and
retained for future use. The resistor array is comprised of
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.
The wiper, when at either fixed terminal, acts like its
mechanical equivalent and does not move beyond the last
position. The wiper 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
R
a significant amount if the wiper is moved several positions.
value for the device can temporarily be reduced by
TOTAL
(INC to RW change). The
IW
adjustments might be based on user preference, system
parameter changes due to temperature drift, etc.
The state of U/D
This allows the host system to enable the device and then
move the wiper up and down until the proper trim is attained.
During initial power-up CS
V
to avoid an accidental store generation.
CC
CSINCU/DMODE
LHWiper up
LLWiper down
HXXStandby current
HHXStandby
may be changed while CS remains LOW.
must go high along with or before
TABLE 1. MODE SELECTION
HXStore wiper position
LXNo store, return to standby
LHWiper up one position
(not recommended)
LLWiper down one position
(not recommended)
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.
Instructions and Programming
The INC, U/D and CS inputs control the movement of the
wiper along the resistor array. With CS
is selected and enabled to respond to the U/D
inputs. HIGH to LOW transitions on INC
decrement (depending on the state of the U/D
bit wiper counter. The output of this wiper counter is decoded
to select one of 128 wiper positions along the resistive array.
The value of the wiper counter is stored in nonvolatile
memory whenever CS
is also HIGH.
The system may select the ISL95710, 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
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.
transitions HIGH while the INC input
set LOW the device
and INC
will increment or
input) a seven
LOW while taking CS
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
9
FN8240.3
August 31, 2006
Page 10
ISL95710
www.BDTIC.com/Intersil
Mini Small Outline Plastic Packages (MSOP)
N
EE1
INDEX
AREA
AA1A2
TOP VIEW
-H-
SIDE VIEW
12
b
e
D
NOTES:
1. These package dimensions are within allowable dimensions of
JEDEC MO-187BA.
2. Dimensioning and tolerancing per ANSI Y14.5M-1994.
3. Dimension “D” does not include mold flash, protrusions or gate
burrs and are measured at Datum Plane. Mold flash, protrusion
and gate burrs shall not exceed 0.15mm (0.006 inch) per side.
4. Dimension “E1” does not include interlead flash or protrusions
and are measured at Datum Plane.Interlead flash and
protrusions shall not exceed 0.15mm (0.006 inch) per side.
5. Formed leads shall be planar with respect to one another within
0.10mm (.004) at seating Plane.
6. “L” is the length of terminal for soldering to a substrate.
7. “N” is the number of terminal positions.
8. Terminal numbers are shown for reference only.
9. Dimension “b” does not include dambar protrusion. Allowable
dambar protrusion shall be 0.08mm (0.003 inch) total in excess
of “b” dimension at maximum material condition. Minimum space
between protrusion and adjacent lead is 0.07mm (0.0027 inch).
- H -
-A -
.
10. Datums and to be determined at Datum plane
11. Controlling dimension: MILLIMETER. Converted inch dimensions are for reference only
-B-
0.20 (0.008) A
GAUGE
PLANE
SEATING
PLANE
0.10 (0.004) C
-A-
0.20 (0.008) C
- B -
0.25
(0.010)
-C-
SEATING
PLANE
a
0.20 (0.008) C
- H -
B
4X θ
C
D
4X θ
L1
C
C
L
E
1
END VIEW
R1
R
L
-B-
M10.118 (JEDEC MO-187BA)
10 LEAD MINI SMALL OUTLINE PLASTIC PACKAGE
INCHESMILLIMETERS
SYMBOL
A0.0370.0430.941.10-
A10.0020.0060.050.15-
A20.0300.0370.750.95-
b0.0070.0110.180.279
c0.0040.0080.090.20-
D0.1160.1202.953.053
E10.1160.1202.953.054
e0.020 BSC0.50 BSC-
E0.1870.1994.755.05-
L0.0160.0280.400.706
L10.037 REF0.95 REF-
N10107
R0.003-0.07--
R10.003-0.07--
o
θ
α
5
o
0
15
o
o
6
o
5
o
0
15
o
o
6
Rev. 0 12/02
NOTESMINMAXMINMAX
-
-
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 implic atio n or other wise u nde r any p a tent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
10
FN8240.3
August 31, 2006
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