ISL22343: Quad Digitally Controlled Potentiometer (XDCP™), Low Noise, Low Power, I2C® Bus, 256 Taps

The ISL22343 integrates four digitally controlled potentiometers (DCP), control logic and non-volatile memory on a monolithic CMOS integrated circuit.

The digitally controlled potentiometer is implemented with a combination of resistor elements and CMOS switches. The position of the wipers are controlled by the user through the I2C bus interface. The 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 corresponding wiper. At power up the device recalls the contents of the DCP's IVRi to the correspondent WRi.

The ISL22343 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 ISL22343 features a dual supply, that is beneficial for applications requiring a bipolar range for DCP terminals between V- and VCC.

Each DCP 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.

Key Features
  • Four potentiometers in one package
  • 256 resistor taps
  • I2C serial interface
    • Three address pins, up to eight devices per bus
  • 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: 70Ω typical @ 1mA
  • Standby current <4µA max
  • Shutdown current <4µA max
  • Dual power supply
    • VCC = 2.25V to 5.5V
    • V- = -2.25V to -5.5V
  • 10kΩ, 50kΩ or 100kΩ total resistance
  • Extended industrial temperature range: -40°C to +125°C
  • 20 Ld TSSOP or 20 Ld QFN
  • Pb-free (RoHS compliant)
Typical Diagram
Application Notes
TitleTypeUpdatedSizeOther Languages
AN9705: A Theoretical View of Coherent SamplingPDF13 Nov 201425 KB
AN9675: Coherent and Windowed Sampling with A/D ConvertersPDF13 Nov 2014160 KB
AN1699: Digital Control Potentiometers Offer Hidden Benefits for Many DesignsPDF13 Nov 2014129 KB
AN1693: Choose a Digitally-Controlled Potentiometer Instead of a DACPDF13 Nov 2014134 KB
AN1425: Get Precision Performance from a Digitally Controlled Potentiometer (DCP)PDF13 Nov 201456 KB
AN002: Principles of Data Acquisition and ConversionPDF13 Nov 2014257 KB
Datasheets
TitleTypeUpdatedSizeOther Languages
ISL22343 DatasheetPDF17 Aug 2015732 KB
Software
TitleTypeUpdatedSizeOther Languages
DCP Evaluation Board Software v5.2.0EXE20 Mar 20152.73 MB
User Guides
TitleTypeUpdatedSizeOther Languages
Digital Potentiometer (DCP) Evaluation USB Kit User GuidePDF12 May 2015330 KB
Order Information
Part NumberPackage TypeWeight(g)PinsMSL RatingPeak Temp (°C)RoHS Status
ISL22343TFR20Z20 Ld QFN0.069202260RoHS
ISL22343TFR20Z-TK20 Ld QFN T+R0.069202260RoHS
ISL22343TFV20Z20 Ld TSSOP0.072201260RoHS
ISL22343TFV20Z-TK20 Ld TSSOP T+R0.072201260RoHS
ISL22343UFR20Z20 Ld QFN0.069202260RoHS
ISL22343UFR20Z-TK20 Ld QFN T+R0.069202260RoHS
ISL22343UFV20Z20 Ld TSSOP0.072201260RoHS
ISL22343UFV20Z-TK20 Ld TSSOP T+R0.07220260RoHS
ISL22343WFR20Z20 Ld QFN0.069202260RoHS
ISL22343WFR20Z-TK20 Ld QFN T+R0.069202260RoHS
ISL22343WFV20Z20 Ld TSSOP0.072201260RoHS
ISL22343WFV20Z-TK20 Ld TSSOP T+R0.072201260RoHS
ISL22343 Datasheet 17 Aug 2015
20 Ld QFN T+R HIP6004D
20 Ld TSSOP ISL22346WM
ISL22343
AN9705: A Theoretical View of Coherent Sampling 13 Nov 2014
AN9675: Coherent and Windowed Sampling with A/D Converters 13 Nov 2014
AN1699: Digital Control Potentiometers Offer Hidden Benefits for Many Designs 13 Nov 2014
AN1693: Choose a Digitally-Controlled Potentiometer Instead of a DAC 13 Nov 2014
AN1425: Get Precision Performance from a Digitally Controlled Potentiometer (DCP) 13 Nov 2014
AN002: Principles of Data Acquisition and Conversion 13 Nov 2014
DCP Evaluation Board Software v5.2.0 20 Mar 2015
Digital Potentiometer (DCP) Evaluation USB Kit User Guide 12 May 2015