Overview

The ISL22511 is a three-terminal digitally-controlled potentiometer (XDCP) implemented by a resistor array composed of 31 resistive elements and a wiper switching network. The ISL22511 features a push-button control, a Shutdown mode, and an industry-leading UTQFN package. The push-button control has individual PU and PD inputs for adjusting the wiper. To eliminate redundancy, the wiper position automatically increments or decrements if one of these inputs is held longer than one second. Forcing both PU and PD low for more than two seconds activates shutdown mode. Shutdown mode disconnects the top of the resistor chain and moves the wiper to the lowest position to minimize power consumption. The three terminals accessing the resistor chain naturally configure the ISL22511 as a voltage divider. A rheostat is easily formed by floating an end terminal or connecting it to the wiper.

ISL22511 Functional Diagram
ISL22511 Functional Diagram
  • Solid-state non-volatile potentiometer
  • Push button controlled
  • Single or auto increment/decrement
    • Fast mode after 1s button press
  • AUTOSTORE of last wiper position or manual store of wiper position
  • Shutdown mode
  • 32 wiper tap points
    • Max scale wiper position on power-up
  • Low power CMOS
    • VCC = 2.7V to 5.5V
    • Terminal voltage, 0V to VCC
    • Standby current, 3µA max
  • RTOTAL value = 10kΩ
  • High reliability
    • Endurance: 200000 data changes per bit per register
    • Register data retention: 50 years at T ≤ +55°C
  • 10 Ld UTQFN (2.1mmx1.6mm) package
  • Pb-free (RoHS compliant)

Applications

  • Volume control
  • LED/LCD brightness control
  • Contrast control
  • Programming bias voltages
  • Ladder networks

Documentation

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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Product Options

    Processing table
    Pkg. Type
    Carrier Type
    Moisture Sensitivity Level (MSL)
    Price (USD) | 1ku
    Buy / Sample
    Part Number
    ISL22511WFRU10Z-TK
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    Samples Available
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    		uTQFN Reel 1 0.8625 Get Samples,
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