Analog Products

Overview

The ISL23328 is a volatile, low voltage, low noise, low power, 128-Tap, dual digitally controlled potentiometer (DCP) with an I2C Bus™ interface. It integrates two DCP cores, wiper switches and control logic on a monolithic CMOS integrated circuit. Each 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. Each potentiometer has an associated volatile Wiper Register (WRi, i = 0, 1) that can be directly written to and read by the user. The contents of the WRi controls the position of the wiper. When powered on, the wiper of each DCP will always commence at mid-scale (64 tap position). The low voltage, low power consumption, and small package of the ISL23328 make it an ideal choice for use in battery operated equipment. In addition, the ISL23328 has a VLOGIC pin allowing down to 1. 2V bus operation, independent from the VCC value. This allows for low logic levels to be connected directly to the ISL23328 without passing through a voltage level shifter. The DCP can be used as a three-terminal potentiometer or as a two-terminal variable resistor in a wide variety of applications including control, parameter adjustments, and signal processing.

ISL23328 Functional Diagram
ISL23328 Functional Diagram
  • Two potentiometers per package
  • 128 resistor taps
  • 10kΩ, 50kΩ or 100kΩ total resistance
  • I2C serial interface
  • No additional level translator for low bus supply
  • Three address pins allow up to eight devices per bus
  • Power supply
  • VCC = 1.7V to 5.5V analog power supply
  • VLOGIC = 1.2V to 5.5V I2C bus/logic power supply
  • Maximum supply current without serial bus activity (standby)
  • 3µA @ VCC and VLOGIC = 5V
  • 1.7µA @ VCC and VLOGIC = 1.7V
  • Shutdown Mode
  • Forces the DCP into an end-to-end open circuit and RWi is connected to RLi internally
  • Reduces power consumption by disconnecting the DCP resistor from the circuit
  • Wiper resistance: 70Ω typical @ VCC = 3.3V
  • Power-on preset to mid-scale (64 tap position)
  • Extended industrial temperature range: -40°C to +125°C
  • 14 Ld TSSOP or 16 Ld UTQFN packages
  • Pb-free (RoHS Compliant)

Applications

  • Power supply margining
  • Trimming sensor circuits
  • Gain adjustment in battery powered instruments
  • RF power amplifier bias compensation

Documentation

Type Title Date
Datasheet
ISL23328 Datasheet
PDF 1.17 MB
Product Advisory
PA22026 - MSL1 Packing Change for listed Renesas Products
PDF 414 KB
Manual - Development Tools
Digital Potentiometer (DCP) Evaluation USB Kit Manual
PDF 1.40 MB
End Of Life Notice
PLC21035 - End of Life Notice
PDF 1.17 MB
Price Increase Notice
PIN19028 - Q3 Cy 19 Price Increase Notice
PDF 208 KB
Manual - Development Tools
RKTA-SEMITECRTDEVZ Evaluation Board Manual
PDF 430 KB
Manual - Development Tools
RTKA-BDGSTKEV1Z User Manual
PDF 1.21 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
AN1699: Digital Control Potentiometers Offer Hidden Benefits for Many Designs
PDF 251 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
12 items

Design & Development

Software Downloads
Type Title Date
End Of Life Notice
PLC21035 - End of Life Notice
PDF 1.17 MB
PCB Design Files
RTKA-BDGSTKEV1Z Design Files
ZIP 4.38 MB
PCB Design Files
RTKA-SEMITECRTDEVZ Design Files
ZIP 4.56 MB
Library
DCP Evaluation Board Software v6.03
EXE 2.56 MB
4 items

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
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    Part Number
    ISL23328WFRUZ-T7A
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    Samples Available
    		 uTQFN Reel 250 Get Samples,
    ISL23328WFRUZ-TK
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    		uTQFN Reel 2000
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