Overview

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 I2C 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.

ISL90842 Functional Diagram
ISL90842 Functional Diagram
  • 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)

Documentation

= Featured Documentation
Type Title Date
Datasheet
ISL90842 Datasheet
PDF 922 KB
Manual - Development Tools
Digital Potentiometer (DCP) Evaluation USB Kit Manual
PDF 1.40 MB
Product Advisory
PA14042 - Minimum Line Quantity Change
PDF 363 KB
Application Note
AN1425: Get Precision Performance from a Digitally Controlled Potentiometer (DCP)
PDF 281 KB
Application Note
AN1173: DC/DC Module Trim with Digital Potentiometers
PDF 513 KB
Application Note
AN1699: Digital Control Potentiometers Offer Hidden Benefits for Many Designs
PDF 251 KB
Other
TB458: Converting a Fixed PWM to an Adjustable PWM
PDF 315 KB
Application Note
AN9675: A Tutorial in Coherent and Windowed Sampling with A/D Converters
PDF 503 KB
Application Note
AN9705: A Theoretical View of Coherent Sampling
PDF 287 KB
9 items

Design & Development

Software Downloads
Type Title Date
Library
DCP Evaluation Board Software v6.03
EXE 2.56 MB
1 item

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models
Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Carrier Type
    Moisture Sensitivity Level (MSL)
    Price (USD) | 1ku
    Buy / Sample
    Part Number
    ISL90842UIV1427Z
    circleActive
    memory
    spa
    view_in_ar
    Samples Available
    Buy Now
    		TSSOP Tube 2 3.32 Get Samples,
    ISL90842UIV1427Z-TK
    circleActive
    memory
    spa
    view_in_ar
    Samples Available
    Buy Now
    		TSSOP Reel 2 2.475 Get Samples,
    Parametric Table tips

    Tips for Using This Parametric Table:

    • Hide Filters button in header: Collapse or expands filters
    • Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
    • Reset button in header: Reset all filters to the page default
    • Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
    • Export button in header: Export the filtered results of the table to an Excel document
    • Filter parts search bar in header: Type to filter table results by part number
    • Hide column button in column headers: Select to hide columns in table
    • AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
    • Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
    • Document icon next to product name in row: View the featured document for this product
    • Chip icon next to the right of the document icon in row: View the block diagram for this product
    • Cart icon to the right of the chip icon: Indicates that samples are available for this product