1

®

FN6426.0

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

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ISL22444

Quad Digitally Controlled Potentiometer (XDCP™)

The ISL22444 integrates four digitally controlled

potentiometers (DCP), control logic and non-volatile memory

on a monolithic CMOS integrated circuit.

The digitally controlled potentiometers are implemented with

a combination of resistor elements and CMOS switches. The

wipers position is controlled by the user through the SPI

serial interface. Each potentiometer has an associated

volatile Wiper Register (WRi) and a non-volatile Initial Value

Register (IVRi) that can be directly written to and read by the

user. The contents of the WRi control the position of the

wiper. At power-up the device recalls the contents of the

DCP’s IVRi to the corresponding WRi.

The ISL22444 also has 11 General Purpose non-volatile

registers that can be used as storage of lookup table for

multiple wiper position or any other valuable information.

The ISL22444 features a dual supply that is beneficial for

applications requiring a bipolar range for DCP terminals

Each DCP can be used as three-terminal potentiometer or

as two-terminal variable resistor in a wide variety of

applications including control, parameter adjustments, and

signal processing.

Features

• Four potentiometers in one package

• 256 resistor taps

• SPI serial interface with write/read capability

• Daisy Chain Configuration

• Shutdown mode

• Non-volatile EEPROM storage of wiper position

• 11 General Purpose non-volatile registers

• High reliability

- Endurance: 1,000,000 data changes per bit per register

- Register data retention: 50 years @ T

≤ +55°C

• Wiper resistance: 70

Ω typical @ 1mA

• Standby current <4µA max

• Shutdown current <4µA max

• Dual power supply

- V- = -2.25V to -5.5V

•10k

Ω, 50kΩ or 100kΩ total resistance

• Extended industrial temperature range: -40 to +125°C

• 20 Ld TSSOP or 20 Ld QFN

• Pb-free plus anneal product (RoHS compliant)

Ordering Information

PART NUMBER

(Notes 1, 2)

PART MARKING

RESISTANCE

OPTION (k

Ω)

TEMPERATURE

RANGE (°C)

PACKAGE

(Pb-free)

PKG. DWG. #

ISL22444TFV20Z

22444 TFVZ

100

-40 to +125

20 Ld TSSOP

M20.173

ISL22444TFR20Z

22444 TFRZ

100

-40 to +125

20 Ld QFN

L20.5x5

ISL22444UFV20Z

22444 UFVZ

50

-40 to +125

20 Ld TSSOP

M20.173

ISL22444UFR20Z

22444 UFRZ

50

-40 to +125

20 Ld QFN

L20.5x5

ISL22444WFV20Z

22444 WFVZ

10

-40 to +125

20 Ld TSSOP

M20.173

ISL22444WFR20Z

22444 WFRZ

10

-40 to +125

20 Ld QFN

L20.5x5

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 1,000 Tape and Reel option

Data Sheet

May 24, 2007