intersil ISL23710 DATA SHEET

®

www.BDTIC.com/Intersil

ISL23710

Volatile Digitally Controlled Potentiometer (XDCP™)

Data Sheet August 22, 2005

Terminal Voltage ±3V or ±5V, 128 Taps
Up/Down Interface

The Intersil ISL23710 is a digitally controlled potentiometer
(XDCP). The device consists of a resistor array, wiper
switches, and a control section. 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 wiper register is volatile and is reset to midscale on
power up. The wiper position can be locked while powered
up to prevent inadvertent changes.

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

Ordering Information

TEMP

PAR T N UMBER

(BRAND)

ISL23710WIU10Z
(AOG) (Notes 1, 2)

ISL23710UIU10Z
(AOF) (Notes 1, 2)

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)

10K -40 to +85 10 Ld MSOP

50K -40 to +85 10 Ld MSOP

RANGE

(°C) PACKAGE

PKG.

DWG. #

M10.118

(Pb-Free)

M10.118

(Pb-Free)

FN6126.0

Features

• Up/Down Interface with Chip Select Enable

• DCP Terminal Voltage from ±2.7V to ±5V

• 127 Resistive Elements

- Typical R

tempco ±50ppm/°C

TOTAL

- Ratiometric tempco ±4ppm/°C

- End to end resistance range ±20%

- Wiper resistance = 70Ω typ at V

CC

= 3.3V

• Low Power CMOS

- V- = -2.7V to -5.5V
= 2.7V to 5.5V

-V

CC

- Active current, 1mA max

- Standby current, 500nA max

•R

Values = 10kΩ, 50kΩ

TOTAL

• Volatile Wiper Storage with Wiper Locking

• Packages

-10 Ld MSOP

• Pb-Free Plus Anneal Available (RoHS Compliant)

Pinout

ISL23710

(10 LD MSOP)

TOP VIEW

U/D

GND

CS
NC

1

V-

2
3

4
5

INC

10

VCC

9

R

8

L

7

R

W

R

6

H

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. 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.

Block Diagram

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ISL23710

UP/DOWN

(U/D

INCREMENT

(INC

DEVICE SELECT

(CS

V

V-

)

INTERFACE

)

)

AND

CONTROL

GND

SIMPLE BLOCK DIAGRAM

CC

U/D

INC

CS

R

H

R

W

R

L

7-BIT
UP/DOWN
COUNTER

RECALL

CONTROL

CIRCUITRY

DECODER

DETAILED BLOCK DIAGRAM

Pin Descriptions

PIN NUMBER SYMBOL DESCRIPTION

1U/D

2 V- Negative supply voltage for the potentiometer wiper control.

3 GND Ground. Should be connected to a digital ground.

4CS

5 NC No Connect. Pin is to be left unconnected.

6R

7R

8R

H

W

L

9 VCC Positive logic supply voltage.

10 INC

Controls the direction of wiper movement and whether the counter is incremented or decremented.

Chip Select. The device is selected when the CS input is LOW.

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

R

H

TRANSFER

GATES

2

1

0

RESISTOR

ARRAY

R

L

R

W

2

FN6126.0

August 22, 2005

ISL23710

www.BDTIC.com/Intersil

Absolute Maximum Ratings Thermal Information

Temperature Under Bias . . . . . . . . . . . . . . . . . . . . .-65°C to +135°C

Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C

Voltage on CS

with Respect to GND . . . . . . . . . . . . . . . . . . . . -0.3V to VCC+0.3V

Voltage on V- (Referenced to GND) . . . . . . . . . . . . . . . . . . . . . . -6V

∆V = |V

Lead Temperature (Soldering 10s) . . . . . . . . . . . . . . . . . . . . . 300°C

(10s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±6mA

I

W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V

V

CC

, RL, RW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V- to V

R

H

ESD Rating (MIL-STD-883, Method 3015.7) . . . . . . . . . . . . . . .>2kV

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:

1. θ

JA

Analog Specifications Over recommended operating conditions unless otherwise stated.

SYMBOL PARAMETER TEST CONDITIONS MIN

R

TOTALRH

V

RH,VRLRH, Rl

R

C

H/CL/CW

I

LkgDCP

VOLTAGE DIVIDER MODE (0V @ RL; V+ @ RH; measured at RW, unloaded)

INL

(Note 6)

DNL

(Note 5)

ZSerror

(Note 3)

FSerror

(Note 4)

TC

(Note 7,13)

RESISTOR MODE (Measurements between RW and RL with RH not connected, or between RW and RH with RL not connected)

RINL

(Note 11)

RDNL

(Note 10)

Roffset

(Note 9)

TC

(Notes 12,13)

, INC, U/D and V

(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.

W

V

R

| . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12V

to RL Resistance W option 10 kΩ

R

to RL Resistance Tolerance -20 +20 %

H

Terminal Voltage V- V

Wiper Resistance V- = -5.5V; VCC = +5.5V,

Potentiometer Capacitance (Note 13) 10/10/

Leakage on DCP Pins Voltage at pin from V- to V

Integral Non-linearity -1 1 LSB

Differential Non-linearity W, U options -0.5 0.5 LSB

Zero-Scale Error W option 0 1 4 LSB

Full-Scale Error W option -4 -1 0 LSB

Ratiometric Temperature Coefficient DCP register set to i = 16 to 120d,

Integral Non-linearity DCP register set between 16 and 127d Monotonic

Differential Non-linearity -0.5 0.5 MI

Offset DCP register set to 0d, W option 0 2 5 MI

Resistance Temperature Coefficient DCP register set to i = 16 to 127d,

CC

CC

U option 50 kΩ

wiper current = (V

U option 0 0.5 2

U option -2 -0.5 0

T = -40°C to 85°C

over all tap positions

DCP register set to 0d, U option 0 0.5 2 MI

T = -40°C to +85°C

Thermal Resistance (Typical, Note 1) θ

MSOP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

Recommended Operating Conditions

Temperature Range (Industrial). . . . . . . . . . . . . . . . . -40°C to +85°C

V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V

CC

V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2.7V to -5.5V

TYP

(Note 1) MAX UNIT

70 200 Ω

- V-)/R

CC

TOTAL

CC

25

-1 0.1 1 µA

±4 ppm/°C

-1 1 MI

±50 ppm/°C

CC

(°C/W)

JA

V

pF

(Note 2)

(Note 2)

(Note 2)

(Note 2)

(Note 8)

(Note 8)

(Note 8)

(Note 8)

3

FN6126.0

August 22, 2005

ISL23710

www.BDTIC.com/Intersil

Operating Specifications Over the recommended operating conditions unless otherwise specified.

SYMBOL PARAMETER TEST CONDITIONS MIN

I

CC1

I

I

SB

I

V-SB

I

LkgDig

Vpor Power-on Recall Voltage Minimum V

SERIAL INTERFACE SPECS

V

V

Hysteresis

(Note 13)

Cpin

(Note 13)

VCC Supply Current, Volatile Write/Read CS = VIL, U/D = VIL or VIH and INC = 0.4V/2.4V

min. t

V- Supply Current, Volatile Write/Read CS = VIL, U/D = VIL or VIH and INC = 0.4V/2.4V

V-

VCC Current (Standby) V

V- Current (Standby) V- = -5.5V, 3 Wire Interface in Standby State -500 nA

Leakage Current, at Pins INC, CS, U/D,
A0, and A1

INC, CS, and U/D Input Buffer LOW

IL

Voltage

INC, CS, and U/D Input Buffer HIGH

IH

Voltage

, CS, and U/D Input Buffer Hysteresis 0.15*

INC

INC

, CS, and U/D Pin Capacitance 10 pF

min. t

CC

V

CC

= -2.7V, 3 Wire Interface in Standby State -300 nA

V-

Voltage at pin from GND to V

, RH, RW not connected

CYC RL

, RH, RW not connected

CYC RL

= +5.5V, 3 Wire Interface in Standby State 500 nA

= +2.7V, 3 Wire Interface in Standby State 300 nA

CC

at which the wiper is Reset 2.5 V

CC

TYP

(Note 1) MAX UNITS

500 µA

-100 µA

-10 10 µA

-0.3 0.3*V

0.7*V

CC

V

CC

CC

VCC+0.3 V

V

V

AC Electrical Specifications V

SYMBOL PARAMETER MIN TYP (Note 1) MAX UNIT

t

Cl

t

lD

t

DI

t

lL

t

lH

t

ICL

(Note 13) INC to RW Change 1 µs

t

IW

t

CYC

t

R, tF

CS to INC Setup 100 ns

INC HIGH to U/D Change 100 ns

U/D to INC Setup 1 µs

INC LOW Period 1 µs

INC HIGH Period 1 µs

Lock Setup Time, INC High to CS High 1 µs

INC Cycle Time 2 µs

INC Input Rise and Fall Time 500 µs

= 5V ±10%, TA = Full Operating Temperature Range unless otherwise stated

CC

4

FN6126.0

August 22, 2005

ISL23710

www.BDTIC.com/Intersil

NOTES:

1. Typical values are for T

2. LSB: [V(RW)
incremental voltage when changing from one tap to an adjacent tap.

3. ZS error = V(RW)

4. FS error = [V(RW)

5. DNL = [V(RW)

6. INL = V(RW)

7.

TC

V

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.

TC

R

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.

127

– V(RW)

i

– (i • LSB – V(RW)0) for i = 1 to 127.

i

Max V RW()

()Min V RW()

------------------------------------------------------------- --------------------------------- x
Max V RW()

()Min V RW()

|R

– R

127

0

/MI, when measuring between RW and RL.

0

/MI, when measuring between RW and RH.

127

– R

i

i-1

– (MI • i) – R0]/MI, for i = 16 to 127d.

i

Max Ri()Min Ri()–[]

-------------------------------------------------------------- --

Max Ri()Min Ri()+[]2⁄

= 25°C and 3.3V supply voltage.

A

– V(RW)0]/127. V(RW)

/LSB.

0

– VCC]/LSB.

127

]/LSB-1, for i = 1 to 127. i is the DCP register setting.

i-1

()–

i

()+[]2⁄

i

| /127. R

)/MI, for i = 16 to 127d.

and R0 are the measured resistances for the DCP register set to 7F hex and 00 hex respectively.

127

10

-----------------

×=

125°C

and V(RW)0 are V(RW) for the DCP register set to 7F hex and 00 hex respectively. LSB is the

127

i

i

6

6

10

-----------------=
125°C

Symbol Table

WAVEFORM INPUTS OUTPUTS

Must be steady Will be steady

May change from Low to High Will change from Low to High

May change from High to Low

Don’t Care: Changes Allowed Changing: State Not Known

N/A

Will change from High to Low

Center Line is High Impedance

5

FN6126.0

August 22, 2005

AC Timing

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CS

INC

ISL23710

t

CYC

t

CI

t

IL

t

IH

t

ICL

90% 90%

10%

U/D

R

t

ID

t

IW

W

t

DI

(3)

MI

Power Up and Down Requirements

In order to prevent unwanted tap position changes, bring the
CS

and INC high before or concurrently with the VCC pin on
power-up. The 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

reaches its final value. The wiper will be set to its initial

CC

value (64d) once V

exceeds V

CC

POR

.

Pin Descriptions

RH and R

The high (RH) and low (RL) terminals of the ISL23710 are
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.

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 control inputs.

Up/Down (U/D)

The U/D input controls the direction of the wiper movement
and whether the 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
counter in the direction indicated by the logic level on the
U/D

input.

L

and RH references the

L

input and not the voltage

t

F

t

R

Chip Select (CS)

The device is selected when the CS input is LOW.

Principles of Operation

There are three sections of the ISL23710: 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 127
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. 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
R

value for the device can temporarily be reduced by

TOTAL

(INC to VW change). The

IW

a significant amount if the wiper is moved several positions.

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 counter. The output of this counter is decoded to select

set LOW the device

and INC

will increment or

input) a seven

6

FN6126.0

August 22, 2005

one of one-hundred twenty-eight wiper positions along the

www.BDTIC.com/Intersil

resistive array.

ISL23710

Bringing CS
value to be locked until power down (further changes in CS
and INC will not change the wiper position). Otherwise, INC
should be brought HIGH after CS
changes.

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 tap position change.

CC

CS INC U/D MODE

L H Wiper Up

L L Wiper Down

H X Standby

H H X Standby

HIGH after INC is HIGH will cause the wiper

to allow continued wiper

may be changed while CS remains LOW.

must go high along with or before

TABLE 1. MODE SELECTION

H X Lock Wiper Value

L X Standby

L H Wiper up One Position

(not recommended)

L L Wiper Down One Position

(not recommended)

7

FN6126.0

August 22, 2005

ISL23710

www.BDTIC.com/Intersil

Mini Small Outline Plastic Packages (MSOP)

N

EE1

INDEX

AREA

AA1A2

-H-

SIDE VIEW

12

TOP VIEW

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

INCHES MILLIMETERS

SYMBOL

A 0.037 0.043 0.94 1.10 ­A1 0.002 0.006 0.05 0.15 ­A2 0.030 0.037 0.75 0.95 -

b 0.007 0.011 0.18 0.27 9

c 0.004 0.008 0.09 0.20 -

D 0.116 0.120 2.95 3.05 3
E1 0.116 0.120 2.95 3.05 4

e 0.020 BSC 0.50 BSC -

E 0.187 0.199 4.75 5.05 -

L 0.016 0.028 0.40 0.70 6

L1 0.037 REF 0.95 REF -

N10 107

R 0.003 - 0.07 - ­R1 0.003 - 0.07 - -

o

θ

α

5

o

0

15

o

o

6

o

5

o

0

15

o

o

6

Rev. 0 12/02

NOTESMIN MAX MIN MAX

-

-

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

8

FN6126.0

August 22, 2005