ISL22429| Datasheet

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ISL22429
Dual Digitally Controlled Potentiometer (XDCPTM)
Data Sheet September 26, 2006 FN6332.1

Low Noise, Low Power, SPI Bus, 128 Taps, Wiper Only
The ISL22429 integrates two digitally controlled potentiometers (DCP) 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 position of the wipers are controlled by the user through the SPI serial interface. Each potentiometer has an associated volatile Wiper Register (WR) and a non-volatile Initial Value Register (IVR) that can be directly written to and read by the user. The contents of the WR controls the position of the wiper. At power-up the device recalls the contents of the DCP's IVR to the corresponding WR. The DCP can be used as a voltage divider in a wide variety of applications including control, parameter adjustments, AC measurement and signal processing.

Features
Two potentiometers in one package 128 resistor taps SPI serial interface Non-volatile storage of wiper position Wiper resistance: 70 typical @ 3.3V Shutdown mode Shutdown current 5uA max Power supply: 2.7V to 5.5V 50k or 10k total resistance High reliability - Endurance: 1,000,000 data changes per bit per register - Register data retention: 50 years @ T < +55 C 10 Lead MSOP

Pinout
ISL22429 (10 LD MSOP) TOP VIEW
NC SCK SDO GND RW1 1 2 3 4 5 10 9 8 7 6 RW0 SHDN VCC SDI CS

Pb-free plus anneal product (RoHS compliant)

Ordering Information
PART NUMBER ISL22429UFU10Z (Notes 1, 2) ISL22429WFU10Z (Notes 1, 2) 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 PART MARKING 429UZ 429WZ RESISTANCE OPTION (k) 50 10 TEMP. RANGE ( C) -40 to +125 -40 to +125 PACKAGE 10 Ld MSOP (Pb-free) 10 Ld MSOP (Pb-free) PKG. DWG. # M10.118 M10.118

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) and XDCP are registered trademarks of Intersil Americas Inc. Copyright Intersil Americas Inc. 2006. All Rights Reserved All other trademarks mentioned are the property of their respective owners.