intersil ISL90842 DATA SHEET

®

www.BDTIC.com/Intersil

Quad Digitally Controlled Variable Resistors

ISL90842

Data Sheet January 16, 2006

Low Noise, Low Power I2C® Bus, 256 Taps

The ISL90842 integrates four digitally controlled
potentiometers (DCP) configured as variable resistors 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

2

I

C bus interface. Each potentiometer has an associated
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.

The DCPs can be used as two-terminal variable resistors in
a wide variety of applications including control, parameter
adjustments, and signal processing.

FN8096.1

Features

• Four variable resistors in one package

• 256 resistor taps - 0.4% resolution

•I2C serial interface

• Wiper resistance: 70Ω typical @ 3.3V

• Standby current <5µA max

• Power supply: 2.7V to 5.5V

•50kΩ, 10kΩ total resistance

• 14 Lead TSSOP

• Pb-free plus anneal available (RoHS compliant)

Pinout

ISL90842

(14 LEAD TSSOP)

TOP VIEW

RW0

RH3

RW3

SCL

SDA

GND

RW2

RH2

1

2

3

4

5

6

7

14

RH0

13

VCC

12

A1

11

A0

10

RH1

9

RW1

8

Ordering Information

PART NUMBER PART MARKING

ISL90842UIV1427Z (Notes 1 & 2) 90842UI27Z 50K -40 to +85 14 Ld TSSOP (Pb-Free)

ISL90842WIV1427Z (Notes 1 & 2) 90842WI27Z 10K -40 to +85 14 Ld TSSOP (Pb-Free)

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 “-TK” suffix for Tape and Reel.

1

RESISTANCE OPTION

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, 2006. All Rights Reserved

(Ω)

| Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

TEMP RANGE

(°C) PACKAGE

Functional Diagram

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SCL

ISL90842

V

CC

R

H0

R

H1

R

H2

R

H3

Block Diagram

SDA

SCL

A1

A0

SDA

A0

A1

I2C INTERFACE

I2C

INTERFACE

GND R

POWER-UP,

INTERFACE,

CONTROL

AND STATUS

R

L

LOGIC

W0

R

L

V

CC

R

W1

WR3

WR2

WR1

WR0

R

L

R

W2

DCP3

DCP2

DCP1

DCP0

R

L

R

W3

R

H3

R

W3

*

R

H2

R

W2

*

R

H1

R

W1

*

R

H0

R

W0

*

GND

PINS OF EACH DCP ARE LEFT FLOATING

* THE R

L

Pin Descriptions

TSSOP PIN SYMBOL DESCRIPTION

1 RH3 “High” terminal of DCP3

2 RW3 “Wiper” terminal of DCP3

2

3SCLI

4 SDA Serial data I/O for the I

5 GND Device ground pin

6 RW2 “Wiper” terminal of DCP2

7 RH2 “High” terminal of DCP2

8 RW1 “Wiper” terminal of DCP1

9 RH1 “High” terminal of DCP1

10 A0 Device address for the I

11 A1 Device address for the I

12 VCC Power supply pin

13 RH0 “High” terminal of DCP0

14 RW0 “Wiper” terminal of DCP0

C interface clock

2

C interface

2

C interface

2

C interface

2

FN8096.1

January 16, 2006

ISL90842

www.BDTIC.com/Intersil

Absolute Maximum Ratings Recommended Operating Conditions

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

Voltage at any digital interface pin

with respect to GND . . . . . . . . . . . . . . . . . . . . . . -0.3V to V

V

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

CC

Voltage at any DCP pin with

respect to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to V

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

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

I

W

Latchup . . . . . . . . . . . . . . . . . . . . . . . . . . Class II, Level B at +85°C

ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >2kV Human Body Model

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.

Analog Specifications Over recommended operating conditions unless otherwise stated.

SYMBOL PARAMETER TEST CONDITIONS MIN

R

TOTAL

R

C

H/CL/CW

I

LkgDCP

RESISTOR MODE (Measurements between R

RINL

(Note 5)

RDNL

(Note 4)

Roffset

(Note 3)

R

MATCH

(Note 6)

TC

(Note 7)

RH to RW resistance W option, wiper counter = 00h 10 kΩ

U option, wiper counter = 00h 50 kΩ

to RW resistance tolerance Wiper counter = 00h -20 +20 %

R

H

Wiper resistance VCC = 3.3V @ 25°C, wiper current =

W

Potentiometer capacitance (Note 15) 10/10/25 pF

Leakage on DCP pins (Note 15) Voltage at pin from GND to V

Integral non-linearity DCP register set between 20 hex and FF

Differential non-linearity -0.5 0.5 MI

Offset U option 0 1 7 MI

DCP to DCP matching Any two DCPs at the same tap position with

Resistance temperature coefficient DCP register set between 20 hex and FF hex ±45 ppm/°C

R

V

i and RHi, i = 0, 1, 2 or 3)

W

hex; monotonic over all tap positions

W option 0 0.5 2 MI

the same terminal voltages

+0.3

CC

CC

CC/RTOTAL

Industrial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C

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

V

CC

Power rating of each DCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5mW

Wiper current of each DCP . . . . . . . . . . . . . . . . . . . . . . . . . . ±3.0mA

TYP

(NOTE 1) MAX UNIT

70 200 Ω

CC

-1 1 MI

-2 2 MI

0.1 1 µA

(Note 2)

(Note 2)

(Note 2)

(Note 2)

(Note 2)

Operating Specifications Over the recommended operating conditions unless otherwise specified.

SYMBOL PARAMETER TEST CONDITIONS MIN

I

CC1

I

SB

I

LkgDig

VCC supply current (volatile write/
read)

VCC current (standby) V

Leakage current, at pins A0, A1, SDA,
and SCL

f

= 400kHz; SDA = Open; (for I2C, active,

SCL

read and write states)

= +5.5V, I2C interface in standby state 5 µA

CC

= +3.6V, I2C interface in standby state 2 µA

V

CC

Voltage at pin from GND to V

CC

3

TYP

(NOTE 1) MAX UNIT

1mA

-10 10 µA

FN8096.1

January 16, 2006