1

®

FN8086.2

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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ISL90840

Quad Digitally Controlled Potentiometers (XDCP™)

The ISL90840 integrates four digitally controlled

potentiometers (XDCP) on a monolithic CMOS integrated

circuit.

The digitally controlled potentiometers are implemented with

a combination of resistor elements and CMOS switches. The

position of the wipers are controlled by the user through the

volatile Wiper Register (WR) that can be directly written to

and read by the user. The contents of the WR controls the

position of the wiper. When powered on the ISL90810’s

wiper will always commence at mid-scale (128 tap position).

The DCPs can be used as three-terminal potentiometers or

as two-terminal variable resistors in a wide variety of

applications including control, parameter adjustments, and

signal processing.

Features

• Four potentiometers in one package

• 256 resistor taps - 0.4% resolution

- Three address pins, up to eight devices/bus

- Write/Read capability

• Power-on preset to mid-scale (128 tap position)

• Wiper resistance: 70

Ω typical @ 3.3V

• Standby current <5µA max

• Power supply: 2.7V to 5.5V

•50k

Ω, 10kΩ total resistance

• 20 Ld TSSOP package

• Pb-free plus anneal available (RoHS compliant)

Pinout

ISL90840

(20 LD TSSOP)

TOP VIEW

RW0

RL0

RH0

D.N.C.

VCC

A1

A0

RH1

RL1

RW1

20

19

18

17

16

15

14

13

12

11

1

2

3

4

5

6

7

8

9

10

RH3

RL3

RW3

A2

SCL

SDA

GND

RW2

RL2

RH2

Ordering Information

PART NUMBER

PART MARKING

RESIST-ANCE

OPTION

(

Ω)

TEMP

RANGE

(°C)

PACKAGE

PKG. DWG #

ISL90840UIV2027Z (Notes 1 and 2)

ISL90840UI27Z

50k

-40 to +85

20 Ld TSSOP (Pb-free)

MDP0044

ISL90840UIV2027

ISL90840UI27

50k

-40 to +85

20 Ld TSSOP

MDP0044

ISL90840UAV2027Z (Notes 1 and 2) ISL90840UA27Z

50k

-40 to +105

20 Ld TSSOP (Pb-free)

MDP0044

ISL90840WIV2027Z (Notes 1 and 2) ISL90840WI27Z

10k

-40 to +85

20 Ld TSSOP (Pb-free)

MDP0044

ISL90840WIV2027

ISL90840WI27

10k

-40 to +85

20 Ld TSSOP

MDP0044

ISL90840WAV2027Z (Notes 1 and 2) ISL90840WA27Z

10k

-40 to +105

20 Ld TSSOP (Pb-free)

MDP0044

NOTES:

1. 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. Add “T2” suffix for tape and reel.

Data Sheet

November 14, 2006