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MAX9021, MAX9022, MAX9024
Micropower, Ultra-Small, Single/Dual/Quad Single-Supply Comparators


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Status
Active: In Production.

Description
FULL DATA SHEET (PDF, 696kB)
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The MAX9021/MAX9022/MAX9024 single/dual/quad comparators are optimized for low-power consumption while still providing a fast output response. They are designed for single-supply applications from 2.5V to 5.5V, but can also operate from dual supplies. These comparators have a 3µs propagation delay and consume 2.8µA of supply current per comparator over the -40°C to +125°C operating temperature range. The combination of low-power, single-supply operation down to 2.5V, and ultra-small footprint makes these devices ideal for portable applications.

The MAX9021/MAX9022/MAX9024 have 4mV of built-in hysteresis to provide noise immunity and prevent oscillations even with a slow-moving input signal. The input common-mode range extends from the negative supply to within 1.1V of the positive supply. The design of the comparator-output stage substantially reduces switching current during output transitions, eliminating powersupply glitches.

The MAX9021 single comparator is available in tiny 5-pin SC70 and SOT23 packages. The MAX9022 dual comparator is available in 8-pin SOT23, µMAX®, and SO packages, and the MAX9024 quad comparator is available in 14-pin TSSOP and SO packages.

Key Features   Applications/Uses
  • Low-Cost Solution Available in Space-Saving SC70 Packages (Half the Size of SOT23)
  • Low 2.8µA Supply Current
  • 3µs Propagation Delay
  • Internal 4mV Comparator Hysteresis
  • Comparator Output Swings Rail-to-Rail
  • 2.5 to 5.5V Single-Supply Voltage Range
  • No Phase Reversal for Overdriven Inputs
  • Space-Saving Packages
    • 5-Pin SC70 (MAX9021)
    • 8-Pin SOT23 (MAX9022)
    • 8-Pin µMAX (MAX9022)
    • 14-Pin TSSOP (MAX9024)

 
  • Battery-Powered
  • Digital Line Receivers
  • Keyless Entry Systems
  • Mobile Communications
  • Photodiode Preamps
  • Portable Systems
  • Sensor-Signal Detection
  • Threshold Detectors/Discriminators

    Key Specifications:  Comparators
    Part Number Comp-
    arators
    tPD
    (ns)
    VCMVR VSUPPLY (Total)
    (V)
    VSUPPLY (Total)
    (V)
    ICC per Comp.
    (µA)
    VOS
    (mV)
    VOS
    (mV)
    Logic Out Package/Pins Smallest Available Pckg.
    (mm2)
    Oper. Temp.
    (°C)
    Price
    typ to Neg. Rail min max max typ max max w/pins See Notes
    MAX9021  1 3000 Yes 2.5 5.5 5 1 8
    CMOS
    TTL
    TTL/CMOS
    SC70/5
    SOT/5
    5 -40 to +125 $0.29 @1k
    MAX9022  2
    µMAX/8
    SOIC(N)/8
    SOT/8
    9 $0.42 @1k
    MAX9024  4
    SOIC(N)/14
    TSSOP/14
    33 $0.62 @1k
    See All Comparators (83)

    Diagram
    MAX9021, MAX9022, MAX9024: Typical Operating Circuit
    Typical Operating Circuit

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    Document Ref.: 19-1842; Rev 2; 2007-01-18
    This page last modified: 2007-06-14


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