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. 714-0833
FabrikantnummerLM393DT
0,363 €
Each (In a Pack of 20)
Aantal stuks
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 1.25mm 4.9mm 3.9mm 1.25mm -
RS-stocknr. 714-0754
FabrikantnummerLM2903DT
0,275 €
Each (In a Pack of 20)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single CMOS, DL, ECL, MOS, TTL 2 1.3µs 8 2 → 36 V 5 x 4 x 1.25mm 5mm 4mm 1.25mm -
RS-stocknr. 178-5167
FabrikantnummerLM393DT
0,091 €
Each (On a Reel of 2500)
Aantal stuks
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 1.25mm 4.9mm 3.9mm 1.25mm -
RS-stocknr. 178-7406
FabrikantnummerLM2903PT
0,109 €
Each (On a Reel of 4000)
Aantal stuks
Low Power Surface Mount TSSOP Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.3µs 8 2 → 36 V 4.5 x 3.1 x 1.05mm 4.5mm 3.1mm 1.05mm -
RS-stocknr. 178-5160
FabrikantnummerLM2903DT
0,092 €
Each (On a Reel of 2500)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single CMOS, DL, ECL, MOS, TTL 2 1.3µs 8 2 → 36 V 5 x 4 x 1.25mm 5mm 4mm 1.25mm -
RS-stocknr. 860-7404
FabrikantnummerTS881ILT
1,16 €
Each (In a Pack of 10)
Aantal stuks
Low Power Surface Mount SOT-23 Single Push-Pull 1 160ns 5 0.85 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 78dB
RS-stocknr. 795-8394
FabrikantnummerLM2903PT
0,184 €
Each (On a Tape of 50)
Aantal stuks
Low Power Surface Mount TSSOP Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.3µs 8 2 → 36 V 4.5 x 3.1 x 1.05mm 4.5mm 3.1mm 1.05mm -
RS-stocknr. 714-0830
FabrikantnummerLM393D
0,111 €
Each (In a Pack of 20)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single Open Collector 2 1.3µs 8 3 → 28 V 4.9 x 3.9 x 1.25mm 4.9mm 3.9mm 1.25mm -
RS-stocknr. 168-8801
FabrikantnummerTS881ILT
0,554 €
Each (On a Reel of 3000)
Aantal stuks
Low Power Surface Mount SOT-23 Single Push-Pull 1 160ns 5 0.85 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 78dB
RS-stocknr. 877-2756
FabrikantnummerLM311DT
0,345 €
Each (In a Pack of 25)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single DTL, RTL, TTL 1 200ns 8 5 V 5 x 4 x 1.65mm 5mm 4mm 1.65mm -
RS-stocknr. 165-5276
FabrikantnummerLMV331ICT
0,179 €
Each (On a Reel of 3000)
Aantal stuks
Low Power Surface Mount SC-70 Single Open Drain 1 - 5 2.7 → 5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm -
RS-stocknr. 189-1853
FabrikantnummerLM2904YST
620,45 €
1 Reel of 4000
Reel(s)
Low Power Surface Mount MiniSO Single Swing 2 - 8 3 → 30 V 3.2 x 3.1 x 0.95mm 3.2mm 3.1mm 0.95mm -
RS-stocknr. 165-5576
FabrikantnummerLM219DT
0,39 €
Each (On a Reel of 2500)
Aantal stuks
General Purpose Surface Mount SOIC Single Open Collector, TTL 2 80ns 14 ±5 → ±15 V 8.75 x 4 x 1.65mm 8.75mm 4mm 1.65mm -
RS-stocknr. 189-1969
FabrikantnummerLM393QT
0,316 €
Each (In a Pack of 25)
Aantal stuks
Low Power Surface Mount DFN Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.3µs 8 2 → 36 V 2.05 x 2.05 x 0.7mm 2.05mm 2.05mm 0.7mm -
RS-stocknr. 760-9443
FabrikantnummerTS3011ILT
2,634 €
Each (In a Pack of 5)
Aantal stuks
High Speed Surface Mount SOT-23 Single Push-Pull 1 8ns 5 2.2 → 5 V 3 x 1.75 x 1.3mm 3mm 1.75mm 1.3mm 74dB
RS-stocknr. 917-0760
FabrikantnummerTS861ILT
0,665 €
Each (In a Pack of 10)
Aantal stuks
Dual Surface Mount SOT-23 Single Push-Pull 1 500ns 5 2.7 → 10 V 3 x 1.75 x 1.3mm 3mm 1.75mm 1.3mm 70dB
RS-stocknr. 189-1854
FabrikantnummerLM293QT
394,01 €
1 Reel of 3000
Reel(s)
Low Power Surface Mount DFN Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.3µs 8 2 → 36 V 2.05 x 2.05 x 0.7mm 2.05mm 2.05mm 0.7mm -
RS-stocknr. 686-7515
FabrikantnummerTS393IDT
0,773 €
Each (In a Pack of 10)
Aantal stuks
Low Power Surface Mount SOIC Dual, Single Open Drain 2 2.5µs 8 3 → 15 V 4.9 x 3.9 x 1.25mm 4.9mm 3.9mm 1.25mm 71dB
RS-stocknr. 795-6830
FabrikantnummerTS393CDT
0,558 €
Each (In a Pack of 10)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single CMOS, Push-Pull 2 2.5µs 8 2.7 → 16 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm 71dB
RS-stocknr. 714-0811
FabrikantnummerLM339D
2,323 €
Each (In a Pack of 20)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single CMOS, DL, ECL, MOS, TTL 4 1.3µs 14 2 → 36 V 8.75 x 4 x 1.65mm 8.75mm 4mm 1.65mm -