ADCMP391:  Single Comparator Single Comparator with Known Power-Up State

Product Details

Product Status:Recommended for New Designs

The ADCMP391 is a single, rail-to-rail input, low power comparator ideal for use in general-purpose applications. The device operates from a single supply voltage of 2.3 V to 5.5 V and draws a minimal amount of current. The ADCMP391 consumes only 18.6 µ of supply current. The low voltage and low current operation of the ADCMP391 makes it ideal for battery-powered systems.

The ADCMP391 features a common-mode input voltage range of 200 mV beyond rails, an offset voltage of 1 mV typical across the full common-mode range, and a UVLO monitor. In addition, the design of the comparator allows a defined output state upon power-up. The comparator generates a logic low output if the supply voltage is less than the UVLO threshold.

The ADCMP391 is available in an 8-lead, narrow body SOIC package. The ADCMP391 is specified to operate over the extended temperature range of -40°C to +125°C.


  • Battery management/monitoring
  • Power supply detection
  • Window comparators
  • Threshold detectors/discriminators
  • Microprocessor systems


  • Single supply voltage range: 2.3V to 5.5V
  • Rail-to-rail, common-mode input voltage range
  • Low input offset voltage, VOFFSET: 1mV typical
  • Guarantees comparator output logic low from 0.9V VCC to UVLO
  • Temperature range:
    -40°C to +125°C
  • Package types:
    8-Narrow Body SOIC

Functional Block Diagram for ADCMP391

Sample Requests

For device and evaluation board sample requests, please contact your local ADI sales representative.

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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Price, packaging, availability

ADCMP391 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADCMP391ARZ Status: Production SOIC 150 MIL 8 Ind Tube, 98 $0.30 $0.25 Y  Material Info Notify Me Purchase Sample
ADCMP391ARZ-RL7 Status: Production SOIC 150 MIL 8 Ind Reel, 1000 $0.30 $0.25 Y  Material Info Notify Me Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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