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LM2903

ACTIVE

Dual differential comparator

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Data sheet

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Drop-in replacement with upgraded functionality to the compared device.
LM2903B ACTIVE Dual industrial grade standard comparator Pin-to-pin upgrade with increased performance with a wider voltage range.

LM2903

ACTIVE
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Product details

Number of channels (#) 2 Output type Open-collector Propagation delay time (µs) 1.3 Vs (Max) (V) 30 Vs (Min) (V) 2 Vos (offset voltage @ 25 C) (Max) (mV) 7 Iq per channel (Typ) (mA) 0.4 Input bias current (+/-) (Max) (nA) 50 Rail-to-rail Out Rating Automotive, Catalog Operating temperature range (C) -40 to 125 Features Standard comparator VICR (Max) (V) 28.5 VICR (Min) (V) 0
Number of channels (#) 2 Output type Open-collector Propagation delay time (µs) 1.3 Vs (Max) (V) 30 Vs (Min) (V) 2 Vos (offset voltage @ 25 C) (Max) (mV) 7 Iq per channel (Typ) (mA) 0.4 Input bias current (+/-) (Max) (nA) 50 Rail-to-rail Out Rating Automotive, Catalog Operating temperature range (C) -40 to 125 Features Standard comparator VICR (Max) (V) 28.5 VICR (Min) (V) 0
PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 8 19 mm² 3.91 x 4.9 SOIC (D) 8 19 mm² 4.9 x 3.9 SOP (PS) 8 48 mm² 6.2 x 7.8 TSSOP (PW) 8 19 mm² 3 x 6.4 VSSOP (DGK) 8 15 mm² 3 x 4.9
  • NEW LM393B and LM2903B
  • Improved specifications of B-version
    • Maximum rating: up to 38 V
    • ESD rating (HBM): 2k V
    • Low input offset: 0.37 mV
    • Low input bias current: 3.5 nA
    • Low supply-current: 200 µA per comparator
    • Faster response time of 1 µsec
    • Extended temperature range for LM393B
    • Available in tiny 2 x 2mm WSON package
  • B-version is drop-in replacement for LM293, LM393 and LM2903, A and V versions
  • Common-mode input voltage range includes ground
  • Differential input voltage range equal to maximum-rated supply voltage: ±38 V
  • Low output saturation voltage
  • Output compatible with TTL, MOS, and CMOS
  • NEW LM393B and LM2903B
  • Improved specifications of B-version
    • Maximum rating: up to 38 V
    • ESD rating (HBM): 2k V
    • Low input offset: 0.37 mV
    • Low input bias current: 3.5 nA
    • Low supply-current: 200 µA per comparator
    • Faster response time of 1 µsec
    • Extended temperature range for LM393B
    • Available in tiny 2 x 2mm WSON package
  • B-version is drop-in replacement for LM293, LM393 and LM2903, A and V versions
  • Common-mode input voltage range includes ground
  • Differential input voltage range equal to maximum-rated supply voltage: ±38 V
  • Low output saturation voltage
  • Output compatible with TTL, MOS, and CMOS

The LM393B and LM2903B devices are the next generation versions of the industry-standard LM393 and LM2903 comparator family. These next generation B-version comparators feature lower offset voltage, higher supply voltage capability, lower supply current, lower input bias current, lower propagation delay, and improved 2 kV ESD performance and input ruggedness through dedicated ESD clamps. The LM393B and LM2903B can drop-in replace the LM293, LM393 and LM2903, for both "A" and "V" grades.

All devices consist of two independent voltage comparators that are designed to operate from a single power supply over a wide range of voltages. Quiescent current is independent of the supply voltage.

The LM393B and LM2903B devices are the next generation versions of the industry-standard LM393 and LM2903 comparator family. These next generation B-version comparators feature lower offset voltage, higher supply voltage capability, lower supply current, lower input bias current, lower propagation delay, and improved 2 kV ESD performance and input ruggedness through dedicated ESD clamps. The LM393B and LM2903B can drop-in replace the LM293, LM393 and LM2903, for both "A" and "V" grades.

All devices consist of two independent voltage comparators that are designed to operate from a single power supply over a wide range of voltages. Quiescent current is independent of the supply voltage.
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Technical documentation

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Type Title Date
* Data sheet LM393B, LM2903B, LM193, LM293, LM393 and LM2903 Dual Comparators datasheet (Rev. AE) 07 Oct 2020
Technical article Solving top comparator challenges: Chatter 29 Oct 2021
Application note Application Design Guidelines for LM339, LM393, TL331 Family Comparators (Rev. B) 17 Aug 2021
Application note How to Implement Comparators for Improving Performance of Rotary Encoders in Ind 03 Jul 2019
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Technical article Tripping Point: Simplifying circuit breaker design using delta-sigma ADCs 10 Aug 2016
Application note Designing Overcurrent protection for TPL7407L Peripheral Driver 05 Nov 2014

Design & development

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Simulation model

LM2903B PSpice Model (Rev. B)

SLCJ011B.ZIP (43 KB) - PSpice Model
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Simulation model

LM2903 TINA-TI SPICE Model (Rev. A)

SLCM014A.ZIP (9 KB) - TINA-TI Spice Model
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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TINA-TI — SPICE-based analog simulation program

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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