Comparators

A Comparator is a circuit that accepts two voltages or currents and then switches the output showing which of the two is bigger. Comparators are found in components such as analogue to digital converters (ADCs). Comparators are like operational amplifiers except a comparator is designed specifically to operate with positive feedback and output saturated at one power rail or the other.

How a Comparator works

A comparator samples two input pins and turns on the output when identifying either a difference or similarity. An example is when you have a minus voltage on the inverting Pin and a plus non-inverting. When the voltage on the non-inverting equals the inverting voltage the Pin turns on. Normally the output Pin is open and switches to ground when the comparator is activated.

Why use a Comparator?

The primary use of a comparator is converting analogue to digital (ADC). Two supply voltages are applied and the difference determines a high or low digital signal.

Types of Comparator

  • Current sense
  • Differential / Dual differential
  • Dual / Dual CMOS
  • Dual voltage / General voltage
  • General-purpose
  • Ground sense
  • High speed / high-speed CMOS
  • Low current CMOS
  • Low power / low voltage / low-power CMOS
  • Micropower
  • Nano power
  • Precision
  • Push/pull output
  • Quad differential
  • Rail to rail
  • Voltage
  • Window

Mounting Types

Comparators can be found in both surface mount and through-hole mounting configurations to enable use in a wide variety of applications.

Comparator power supply types

Available in both single and dual power supply configurations, a comparator can easily be implemented into a robust solution.

Various package types, pins, sizes, channels per chip, PSRR (power supply rejection ratio), CMRR (common-mode rejection ratio) are all available.


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Beskrivning Pris Comparator Type Mounting Type Package Type Power Supply Type Output Type Number of Channels per Chip Typical Response Time Pin Count Typical Single Supply Voltage Dimensions Length Width Height Typical CMRR
RS-artikelnummer 919-9364
Tillv. art.nrLT6703HVIS5-3#TRMPBF
VarumärkeAnalog Devices
15,152 kr
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Low Power Surface Mount TSOT-23 Single Open Collector 1 - 5 1.4 → 18 V 2.9 x 1.75 x 0.9mm 2.9mm 1.75mm 0.9mm -
RS-artikelnummer 761-8908
Tillv. art.nrLT6703HVIS5-3#TRMPBF
VarumärkeAnalog Devices
24,95 kr
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Low Power Surface Mount TSOT-23 Single Open Collector 1 - 5 1.4 → 18 V 2.9 x 1.75 x 0.9mm 2.9mm 1.75mm 0.9mm -
RS-artikelnummer 144-5907
Tillv. art.nrMIC841LYMT-T5
VarumärkeMicrochip
3,338 kr
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Micro Power Comparator Surface Mount TDFN Single Push-Pull 1 - 6 1.5 → 5.5 V 1.6 x 1.6 x 0.5mm 1.6mm 1.6mm 0.5mm -
RS-artikelnummer 661-2615
Tillv. art.nrLMV331IDBVR
VarumärkeTexas Instruments
6,516 kr
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General Purpose Surface Mount SOT-23 Single Open Collector 1 - 5 3 V, 5 V 2.9 x 1.6 x 1.15mm 2.9mm 1.6mm 1.15mm -
RS-artikelnummer 165-3326
Tillv. art.nrMCP6541UT-I/LT
VarumärkeMicrochip
2,521 kr
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General Purpose Surface Mount SC-70 Single Push-Pull 1 - 5 1.6 → 5.5 V 2.25 x 1.35 x 1mm 2.25mm 1.35mm 1mm 70dB
RS-artikelnummer 911-3253
Tillv. art.nrMIC841LYMT-T5
VarumärkeMicrochip
3,432 kr
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Micro Power Comparator Surface Mount TDFN Single Push-Pull 1 - 6 1.5 → 5.5 V 1.6 x 1.6 x 0.5mm 1.6mm 1.6mm 0.5mm -
RS-artikelnummer 768-1362
Tillv. art.nrMCP6541UT-I/LT
VarumärkeMicrochip
3,636 kr
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General Purpose Surface Mount SC-70 Single Push-Pull 1 - 5 1.6 → 5.5 V 2.25 x 1.35 x 1mm 2.25mm 1.35mm 1mm 70dB
RS-artikelnummer 162-5392
Tillv. art.nrLMV331IDBVR
VarumärkeTexas Instruments
3,526 kr
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General Purpose Surface Mount SOT-23 Single Open Collector 1 - 5 3 V, 5 V 2.9 x 1.6 x 1.15mm 2.9mm 1.6mm 1.15mm -
RS-artikelnummer 866-0231
Tillv. art.nrLM393P
VarumärkeTexas Instruments
4,157 kr
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General Purpose Through Hole PDIP Dual, Single CMOS, MOS, Open Collector, TTL 2 1.3µs 8 2 → 36 V 10.16 x 6.6 x 4.57mm 10.16mm 6.6mm 4.57mm -
RS-artikelnummer 162-6240
Tillv. art.nrLM361M/NOPB
VarumärkeTexas Instruments
20,203 kr
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High Speed Surface Mount SOIC Dual TTL 2 0.02µs 14 - 8.738 x 3.988 x 1.499mm 8.74mm 3.99mm 1.5mm -
RS-artikelnummer 810-239
Tillv. art.nrLM393P
VarumärkeTexas Instruments
3,95 kr
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General Purpose Through Hole PDIP Dual, Single Open Collector 2 1.3µs 8 3 → 28 V 9.81 x 6.35 x 4.57mm 9.81mm 6.35mm 4.57mm -
RS-artikelnummer 168-6807
Tillv. art.nrLM293D
VarumärkeSTMicroelectronics
2,024 kr
Each (In a Tube of 100)
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General Purpose Surface Mount SOIC Dual, Single Open Collector 2 1.3µs 8 3 V, 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V 4.9 x 3.9 x 1.58mm 4.9mm 3.9mm 1.58mm -
RS-artikelnummer 121-8421
Tillv. art.nrLM339N
VarumärkeTexas Instruments
3,344 kr
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General Purpose Through Hole PDIP Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm 4.57mm -
RS-artikelnummer 528-365
Tillv. art.nrLM2901DR
VarumärkeTexas Instruments
3,063 kr
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Differential Surface Mount SOIC Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 8.65 x 3.91 x 1.58mm 8.65mm 3.91mm 1.58mm -
RS-artikelnummer 100-0752
Tillv. art.nrLM393D
VarumärkeTexas Instruments
3,902 kr
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General Purpose Surface Mount SOIC Dual, Single Open Collector 2 1.3µs 8 3 → 28 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm -
RS-artikelnummer 709-7073
Tillv. art.nrAD8214ARMZ
VarumärkeAnalog Devices
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High Voltage Surface Mount MSOP Single - - - 8 5 → 65 V 3 x 3 x 0.85mm 3mm 3mm 0.85mm -
RS-artikelnummer 517-1832
Tillv. art.nrLM239N
VarumärkeTexas Instruments
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Differential Through Hole PDIP Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm 4.57mm -
RS-artikelnummer 145-0107
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VarumärkeTexas Instruments
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Differential Through Hole PDIP Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm 4.57mm -
RS-artikelnummer 761-9014
Tillv. art.nrLTC1440IS8#PBF
VarumärkeAnalog Devices
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Low Power Surface Mount SOIC Dual, Single CMOS, TTL 1 - 8 2 to 11 V 5.004 x 3.988 x 1.498mm 5mm 3.988mm 1.498mm 0.1mV/V
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VarumärkeTexas Instruments
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General Purpose Through Hole MDIP Dual, Single Open Collector 4 1.3µs 14 3 to 28 V 19.05 x 6.35 x 3.3mm 19.05mm 6.35mm 3.3mm -