intersil X9318 DATA SHEET

®

www.BDTIC.com/Intersil

X9318

Data Sheet September 14, 2005

Digitally Controlled Potentiometer
(XDCP™)

FEATURES

• Solid-state potentiometer

• 3-wire serial interface

• Terminal voltage, 0 to +8V

• 100 wiper tap points
—Wiper position stored in nonvolatile memory

and recalled on power-up

• 99 resistive elements
—Temperature compensated
—End to end resistance range ± 20%

• Low power CMOS

CC

TOTAL

= 5V

value = 10kΩ

—V
—Active current, 3mA max.
—Standby current, 1mA max.

• High reliability
—Endurance, 100,000 data changes per bit
—Register data retention, 100 years

•R

• Packages
—8 Ld SOIC and DIP

• Pb-free plus anneal available (RoHS compliant)

APPLICATIONS

FN8184.1

DESCRIPTION

The Intersil X9318 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 3-wire interface.

The potentiometer is implemented by a resistor array
composed of 99 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

, and INC inputs. The position of the wiper can be

U/D
stored in nonvolatile memory and then be recalled
upon a subsequent power-up operation.

The device can be used as a three-terminal potentiome­ter for voltage control or as a two-terminal variable resis­tor for current control in a wide variety of applications.

PIN CONFIGURATION

DIP/SOIC

INC
U/D

R

V

SS

1
2

X9318

3

H

4

V

8

CC

CS

7

R

6
5

L

R

W

,

• LCD bias control

• DC bias adjustment

• Gain and offset trim

• Laser diode bias control

• Voltage regulator output control

BLOCK DIAGRAM

V

(Supply Voltage)

CC

Up/Down

(U/D

)

Increment

(INC

Device Select

(CS

Control

Memory

V

SS

General

and

(Ground)

)

)

U/D
INC

CS

R

H

R

W

R

L

V

CC

V

SS

Up/Down

Counter

7-Bit

Nonvolatile

Memory

Store and

Recall

Control

Circuitry

One

of

One
Hundred
Decoder

99

98
97
96

2

1
0

Detailed

Wiper

Switches

Resistor

Array

R

H

R

L

R

W

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 Americas 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.

Ordering Information

www.BDTIC.com/Intersil

X9318

PART NUMBER PART MARKING R

X9318WP8 X9318WP 10 0 to 70 8 Ld PDIP

X9318WP8I X9318WP I -40 to 85 8 Ld PDIP

X9318WS8* X9318W 0 to 70 8 Ld SOIC (150 mil)

X9318WS8Z* (Note) X9318W Z 0 to 70 8 Ld SOIC (150 mil) (Pb-free)

X9318WS8I* X9318W I -40 to 85 8 Ld SOIC (150 mil)

X9318WS8IZ* (Note) X9318W Z I -40 to 85 8 Ld SOIC (150 mil) (Pb-free)

*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.

(kΩ) TEMP RANGE (°C) PACKAGE

TOTAL

PIN DESCRIPTIONS

DIP/SOIC Symbol Brief Description

1INCIncrement. Toggling INC while CS is low moves the wiper either up or down.
2U/D
3R
4V

SS

5R
6

R

7CS
8V

CC

Up/Down. The U/D input controls the direction of the wiper movement.
The high terminal is equivalent to one of the fixed terminals of a mechanical potentiometer.

H

Ground.

The wiper terminal is equivalent to the movable terminal of a mechanical potentiometer.

W

The low terminal is equivalent to one of the fixed terminals of a mechanical potentiometer.

L

Chip Select. The device is selected when the CS input is LOW, and de-selected when CS is high.
Supply Voltage.

2

FN8184.1

September 14, 2005

X9318

www.BDTIC.com/Intersil

ABSOLUTE MAXIMUM RATINGS

Junction Temperature under bias...... -65°C to +135°C

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

Voltage on CS

, INC, U/D and V

CC

with respect to VSS................................. -1V to +7V

, RW, RL to ground..........................................+10V

R

H

Lead temperature (soldering 10s) ..................... 300°C

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

I

W

COMMENT

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.

POTENTIOMETER CHARACTERISTICS

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

(V

CC

Limits

Symbol Parameter

End to end resistance tolerance -20 +20 % See ordering information

V

RH/RL

R

I

W

C

H/CL/CW

W

)

RH/RL terminal voltage V
Power rating 25 mW
Wiper resistance 40 200 Ω IW = 1mA
Wiper current

(7)

Noise
Resolution 1 %
Absolute linearity
Relative linearity
R

TOTAL

Ratiometric temperature coeffi-

(5),(6)

cient

(5

Potentiometer capacitances 10/10/25 pF See equivalent circuit

(5)

(1)

(2)

temperature coefficient

SS

-3.0 +3.0 mA See test circuit

-1 +1 MI

-0.2 +0.2 MI

(5)

-20 +20 ppm/°C

(4)

-120 dBV Ref: 1kHz

±300 ppm/°C

Max. Unit

8VV

(3)
(3)

Test Conditions/NotesMin. Typ.

for values

SS

V(RH) = 8V,
V(RL) = 0V

= 0V

V

CC

Supply Voltage 4.5 5.5 V

3

FN8184.1

September 14, 2005