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Product details

Parameters

Number of channels (#) 1 Output type Open-collector Propagation delay time (µs) 0.44 Vs (Max) (V) 30 Vs (Min) (V) 5 Vos (offset voltage @ 25 C) (Max) (mV) 7 Iq per channel (Typ) (mA) 0.25 Input bias current (+/-) (Max) (nA) 250 Rail-to-rail Out Rating Catalog Operating temperature range (C) -40 to 85 Features Standard comparator VICR (Max) (V) 28.5 VICR (Min) (V) 0 open-in-new Find other Comparators

Package | Pins | Size

SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 open-in-new Find other Comparators

Features

  • TA = 25°C. Typical Values Unless Otherwise
    Specified.
  • 5-Pin SOT-23 Package
  • Industrial Operating Range −40°C to +85°C
  • Single or Dual Power Supplies
  • Wide Supply Voltage Range 5 V to 30 V
  • Low Supply Current 300 µA
  • Low Input Bias Current 7 nA
  • Low Input Offset Current ±1 nA
  • Low Input Offset Voltage ±2 mV
  • Response Time 440 ns (50-mV Overdrive)
  • Input Common-Mode Voltage 0 to VS – 1.5 V
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Description

The LM397 device is a single voltage comparator with an input common mode that includes ground. The LM397 is designed to operate from a single 5-V to 30-V power supply or a split power supply. Its low supply current is virtually independent of the magnitude of the supply voltage.

The LM397 features an open-collector output stage. This allows the connection of an external resistor at the output. The output can directly interface with TTL, CMOS and other logic levels, by tying the resistor to different voltage levels (level translator).

The LM397 is available in the space-saving 5-Pin SOT-23 package and is pin-compatible to TI’s TL331, a single differential comparator.

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Technical documentation

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Type Title Date
* Datasheet LM397 Single General-Purpose Voltage Comparator datasheet (Rev. F) May 24, 2016
Application notes Application Design Guidelines for LM339, LM393, TL331 Family Comparators (Rev. A) Feb. 11, 2020
White papers The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
More literature Die D/S LM397 MDC Single Gen Purpose Voltage Comparator Sep. 27, 2012
Technical articles Op Amps used as Comparators—is it okay? Mar. 14, 2012

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Design tools & simulation

SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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Reference designs

REFERENCE DESIGNS Download
Comparator with Hysteresis Reference Design
TIPD144 This TI Verified Design implements a comparator with hysteresis.  Comparators are used to differentiate between two different signal levels.  For example, a comparator may differentiate between an over temperature and normal temperature condition.  Noise or signal variation at the (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOT-23 (DBV) 5 View options

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