Overview

The ISL21440 is a micropower, FGA reference, and comparator on a single chip. Drawing less than 6. 5μA supply current across the full operating temperature range, the ISL21440 operates from a single 2V to 11V supply and can also be used with split bipolar supplies. The ISL21440’s on-board reference provides a 1. 182V ±0. 5% output. It features programmable hysteresis and TTL/CMOS compatible outputs that sink and source current. Low bias currents permit high value divider resistors for typical circuit current drains of 2. 5μA. The low supply current makes the ISL21440 ideal for battery powered devices in battery level or low voltage monitor circuits. The ISL21440 is a pin-compatible, performance upgrade of the LTC1440, LTC1540, MAX921, and MAX931.

ISL21440 Functional Diagram
ISL21440 Functional Diagram
  • 6.5μA supply current across the full temperature range
  • Wide supply range: 2V to 11V
  • Precision 1.182V ±0.5% voltage reference
  • Comparator with user programmable hysteresis
  • Temperature range: -40°C to +125°C
  • 8 Ld MSOP and 8 Ld TDFN packages
  • Pin compatible upgrade to MAX921 and LTC1440

Applications

  • Low Battery Detector
  • Low Voltage Reset
  • Overvoltage Monitor
  • Window Comparator

Documentation

Design & Development

Boards & Kits

Beverage Coaster PCB Board Front

COASTER-REF

Reference
Learn More

Beverage Coaster Reference Design Featuring Synergy MCUs

Renesas' beverage coaster reference design showcases the Renesas Synergy S3 MCU with the ISL8202M 3A power module and several other power and analog signal chain...

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
    MOQ
    Buy / Sample
    Part Number
    ISL21440IRTZ
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    		TDFN Tube 4000
    ISL21440IRTZ-T13
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    		TDFN Reel 6000
    ISL21440IUZ
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    		MSOP Tube 1600
    ISL21440IUZ-T13
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    		MSOP Reel 2500
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