Product details

Number of channels 1 Output type Open-collector, Open-drain Propagation delay time (µs) 0.2 Vs (max) (V) 36 Vs (min) (V) 5 Rating Catalog Features Strobe, Vos Adj Pin Iq per channel (typ) (mA) 5.1 Vos (offset voltage at 25°C) (max) (mV) 7.5 Rail-to-rail No Operating temperature range (°C) 0 to 70 Input bias current (±) (max) (nA) 250 VICR (max) (V) 34 VICR (min) (V) 0.5
Number of channels 1 Output type Open-collector, Open-drain Propagation delay time (µs) 0.2 Vs (max) (V) 36 Vs (min) (V) 5 Rating Catalog Features Strobe, Vos Adj Pin Iq per channel (typ) (mA) 5.1 Vos (offset voltage at 25°C) (max) (mV) 7.5 Rail-to-rail No Operating temperature range (°C) 0 to 70 Input bias current (±) (max) (nA) 250 VICR (max) (V) 34 VICR (min) (V) 0.5
PDIP (P) 8 92.5083 mm² 9.81 x 9.43 SOIC (D) 8 29.4 mm² 4.9 x 6
  • Operates From Single 5V Supply
  • Input Current: 150 nA Max. Over Temperature
  • Offset Current: 20 nA Max. Over Temperature
  • Differential Input Voltage Range: ±30V
  • Power Consumption: 135 mW at ±15V

All trademarks are the property of their respective owners.

  • Operates From Single 5V Supply
  • Input Current: 150 nA Max. Over Temperature
  • Offset Current: 20 nA Max. Over Temperature
  • Differential Input Voltage Range: ±30V
  • Power Consumption: 135 mW at ±15V

All trademarks are the property of their respective owners.

The LM111-N, LM211-N and LM311-N are voltage comparators that have input currents nearly a thousand times lower than devices like the LM106 or LM710. They are also designed to operate over a wider range of supply voltages: from standard ±15V op amp supplies down to the single 5V supply used for IC logic. Their output is compatible with RTL, DTL and TTL as well as MOS circuits. Further, they can drive lamps or relays, switching voltages up to 50V at currents as high as 50 mA.

Both the inputs and the outputs of the LM111-N, LM211-N or the LM311-N can be isolated from system ground, and the output can drive loads referred to ground, the positive supply or the negative supply. Offset balancing and strobe capability are provided and outputs can be wire OR'ed. Although slower than the LM106 and LM710 (200 ns response time vs 40 ns) the devices are also much less prone to spurious oscillations. The LM111-N has the same pin configuration as the LM106 and LM710.

The LM211-N is identical to the LM111-N, except that its performance is specified over a −25°C to +85°C temperature range instead of −55°C to +125°C. The LM311-N has a temperature range of 0°C to +70°C.

The LM111-N, LM211-N and LM311-N are voltage comparators that have input currents nearly a thousand times lower than devices like the LM106 or LM710. They are also designed to operate over a wider range of supply voltages: from standard ±15V op amp supplies down to the single 5V supply used for IC logic. Their output is compatible with RTL, DTL and TTL as well as MOS circuits. Further, they can drive lamps or relays, switching voltages up to 50V at currents as high as 50 mA.

Both the inputs and the outputs of the LM111-N, LM211-N or the LM311-N can be isolated from system ground, and the output can drive loads referred to ground, the positive supply or the negative supply. Offset balancing and strobe capability are provided and outputs can be wire OR'ed. Although slower than the LM106 and LM710 (200 ns response time vs 40 ns) the devices are also much less prone to spurious oscillations. The LM111-N has the same pin configuration as the LM106 and LM710.

The LM211-N is identical to the LM111-N, except that its performance is specified over a −25°C to +85°C temperature range instead of −55°C to +125°C. The LM311-N has a temperature range of 0°C to +70°C.

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Technical documentation

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Type Title Date
* Data sheet LM111/LM211/LM311 Voltage Comparator datasheet (Rev. E) 27 Mar 2013
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Application note AN-103 LM340 Series Three Terminal Positive Regulators (Rev. A) 06 May 2013
Application note AN-288 System-Oriented DC-DC Conversion Techniques (Rev. B) 06 May 2013
Application note AN-298 Isolation Techniques for Signal Conditioning (Rev. B) 06 May 2013
Application note Intro MF10 - Versatile Mono Active Filter Building Blk (Rev. C) 23 Apr 2013
Application note AN-263 Sine Wave Generation Techniques (Rev. C) 22 Apr 2013
More literature Die D/S LM311 MDA Voltage Comparator 20 Sep 2012
Application note Circuit Techniques for Avoiding Oscillations in Comparator Applications 02 Oct 2002

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