Analog Products

Overview

The ISL22346 integrates four 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 I2C bus 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 two DCP's IVR to the corresponding WRs. The DCPs can be used as a three-terminal potentiometers or as a two-terminal variable resistors in a wide variety of applications including control, parameter adjustments, and signal processing.

ISL22346 Functional Diagram
ISL22346 Functional Diagram
  • Four potentiometers in one package
  • 128 resistor taps
  • I2C serial interface
  • Three address pins, up to eight devices/bus
  • Non-volatile storage of wiper position
  • Wiper resistance: 70Ω typical @ VCC = 3.3V
  • Shutdown mode
  • Shutdown current 5µA max
  • Power supply: 2.7V to 5.5V
  • 50kΩ or 10kΩ total resistance
  • High reliability
  • Endurance: 1,000,000 data changes per bit per register
  • Register data retention: 50 years @ T ≤ +55°C
  • 20 Ld TSSOP or 20 Ld TQFN package
  • Pb-free (RoHS compliant)

Documentation

Type Title Date
Datasheet
ISL22346 Datasheet
PDF 1.03 MB
Product Change Notice
PCN22036 - Shipping medium change from Tube to Tray for listed Renesas TDFN, TQFN, DFN and QFN packaged products
PDF 169 KB
Manual - Development Tools
Digital Potentiometer (DCP) Evaluation USB Kit Manual
PDF 1.40 MB
Product Change Notice
PCN11113A - Manufacturing Site Change for Assembly of the Listed Intersil TSSOP Packaged Products - Carsem-M (CAM) - Ipoh, Malaysia
PDF 121 KB
Product Change Notice
PCN11113 - Manufacturing Site Change for Assembly of the Listed Intersil TSSOP Packaged Products - Carsem-M (CAM) - Ipoh, Malaysia
PDF 120 KB
Application Note
AN1425: Get Precision Performance from a Digitally Controlled Potentiometer (DCP)
PDF 281 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
10 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.

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Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
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    Part Number
    ISL22346UFRT20Z
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    memory
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    Samples Available
    		 TQFN Tray 980 Get Samples,
    ISL22346UFRT20Z-TK
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    memory
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    		TQFN Reel 1000
    ISL22346UFV20Z
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    memory
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    Samples Available
    		 TSSOP Tube 740 Get Samples,
    ISL22346UFV20Z-TK
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    memory
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    		TSSOP Reel 1000
    ISL22346WFRT20Z
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    memory
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    Samples Available
    		 TQFN Tray 980 Get Samples,
    ISL22346WFRT20Z-TK
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    memory
    spa
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    Samples Available
    		 TQFN Reel 1000 Get Samples,
    ISL22346WFV20Z
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    memory
    spa
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    Samples Available
    		 TSSOP Tube 740 Get Samples,
    ISL22346WFV20Z-TK
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    memory
    spa
    view_in_ar
    		TSSOP Reel 1000
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    ISL22346UFRT20Z
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    ISL22346UFV20Z
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    ISL22346WFRT20Z
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    ISL22346WFRT20Z-TK
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    ISL22346WFV20Z
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