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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Omschrijving Prijs 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-stocknr. 805-1365
FabrikantnummerLM311DR2G
FabrikantON Semiconductor
0,352 €
Each (On a Tape of 25)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single CMOS 1 200ns 8 36 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS-stocknr. 145-5224
FabrikantnummerLM311DR2G
FabrikantON Semiconductor
0,136 €
Each (On a Reel of 2500)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single CMOS 1 200ns 8 36 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS-stocknr. 787-8816
FabrikantnummerNCS2202SQ2T2G
FabrikantON Semiconductor
0,567 €
Each (On a Tape of 10)
Aantal stuks
Low Power Surface Mount SC-70 Single Open Drain 1 35µs 5 0.85 → 6 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 65dB
RS-stocknr. 185-9057
FabrikantnummerNCV2250SN2T1G
FabrikantON Semiconductor
0,447 €
Each (In a Pack of 13)
Aantal stuks
High Speed Surface Mount TSOP Single Rail to Rail 1 - 5 1.8 → 5.5 V 3.15 x 1.65 x 1mm 3.15mm 1.65mm 1mm 81dB
RS-stocknr. 170-3426
FabrikantnummerLM293DR2G
FabrikantON Semiconductor
0,099 €
Each (On a Reel of 2500)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single Open Collector 2 1.3µs 8 3 → 28 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS-stocknr. 145-3570
FabrikantnummerLM2903VDR2G
FabrikantON Semiconductor
0,123 €
Each (On a Reel of 2500)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.5µs 8 2 → 36 V dc 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS-stocknr. 163-2420
FabrikantnummerLM393DR2G
FabrikantON Semiconductor
0,076 €
Each (On a Reel of 2500)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single Open Collector 2 1.3µs 8 3 → 28 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS-stocknr. 689-9718
FabrikantnummerLM339DR2G
FabrikantON Semiconductor
0,466 €
Each (In a Pack of 5)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single Open Collector 4 1.3µs 14 5 → 28 V 8.75 x 4 x 1.5mm 8.75mm 4mm 1.5mm -
RS-stocknr. 145-5313
FabrikantnummerKA2803B
FabrikantON Semiconductor
0,489 €
Each (In a Tube of 50)
Aantal stuks
General Purpose Through Hole PDIP - - - - 8 - 10.15 x 6.35 x 3.3mm 10.15mm 6.35mm 3.3mm -
RS-stocknr. 162-9567
FabrikantnummerNCS2202SN1T1G
FabrikantON Semiconductor
0,486 €
Each (On a Reel of 3000)
Aantal stuks
Low Power Surface Mount SOT-23 Single Open Drain 1 35µs 5 0.85 → 6 V 3 x 1.5 x 1mm 3mm 1.5mm 1mm 65dB
RS-stocknr. 162-9345
FabrikantnummerLM2903DMR2G
FabrikantON Semiconductor
0,068 €
Each (On a Reel of 4000)
Aantal stuks
General Purpose Surface Mount MSOP Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.5µs 8 2 → 36 V dc 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm -
RS-stocknr. 162-9349
FabrikantnummerLM293DMR2G
FabrikantON Semiconductor
0,124 €
Each (On a Reel of 4000)
Aantal stuks
General Purpose Surface Mount MSOP Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.5µs 8 2 → 36 V dc 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm -
RS-stocknr. 163-2416
FabrikantnummerLM339DR2G
FabrikantON Semiconductor
0,097 €
Each (On a Reel of 2500)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single Open Collector 4 1.3µs 14 5 → 28 V 8.75 x 4 x 1.5mm 8.75mm 4mm 1.5mm -
RS-stocknr. 787-8598
FabrikantnummerLM211DR2G
FabrikantON Semiconductor
0,413 €
Each (On a Tape of 20)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single DTL, MOS, RTL, TTL 1 200ns 8 5 → 30 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS-stocknr. 166-1860
FabrikantnummerLM2903N
FabrikantON Semiconductor
0,733 €
Each (In a Tube of 50)
Aantal stuks
General Purpose Through Hole PDIP Dual, Single Open Collector 2 0.2 μs, 1.4 μs 8 2 → 36 V 9.6 x 6.4 x 3.4mm 9.6mm 6.4mm 3.4mm -
RS-stocknr. 162-9340
FabrikantnummerLM211DR2G
FabrikantON Semiconductor
0,164 €
Each (On a Reel of 2500)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single DTL, MOS, RTL, TTL 1 200ns 8 5 → 30 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS-stocknr. 787-8481
FabrikantnummerNCS2220AMUT1G
FabrikantON Semiconductor
1,098 €
Each (On a Tape of 5)
Aantal stuks
Low Power Surface Mount UDFN Single Rail to Rail 2 - 8 0.85 → 6 V 1.6 x 1.6 x 0.5mm 1.6mm 1.6mm 0.5mm 70dB
RS-stocknr. 162-9566
FabrikantnummerNCS2200SN2T1G
FabrikantON Semiconductor
0,288 €
Each (On a Reel of 3000)
Aantal stuks
Low Power Surface Mount SOT-23 Single Complementary 1 35µs 5 0.85 → 6 V 3 x 1.5 x 1mm 3mm 1.5mm 1mm 65dB
RS-stocknr. 166-1626
FabrikantnummerFAN156L6X
FabrikantON Semiconductor
0,159 €
Each (On a Reel of 5000)
Aantal stuks
Low Power Surface Mount MicroPak Single Push-Pull 1 0.0054µs 6 5.5 V 1.45 x 1 x 0.5mm 1.45mm 1mm 0.5mm 60dB
RS-stocknr. 145-3569
FabrikantnummerLM2901VDTBR2G
FabrikantON Semiconductor
0,216 €
Each (On a Reel of 2500)
Aantal stuks
General Purpose Surface Mount TSSOP Dual, Single CMOS, TTL 4 1.3µs 14 3 → 36 V 5.1 x 4.5 x 1.05mm 5.1mm 4.5mm 1.05mm -