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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Description Prix 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
N° de stock RS 714-0773
Référence fabricantLM293DT
0,233 €
Each (In a Pack of 20)
Unité
Low Power 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 -
N° de stock RS 169-8167
Référence fabricantNJM2903V-TE1
0,216 €
Each (On a Reel of 2000)
Unité
General Purpose Surface Mount SSOP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 3.5 x 4.4 x 1.15mm 3.5mm 4.4mm 1.15mm -
N° de stock RS 165-3567
Référence fabricantMCP6546T-E/OT
MarqueMicrochip
0,229 €
Each (On a Reel of 3000)
Unité
General Purpose Surface Mount SOT-23 Single Open Drain 1 - 5 1.6 → 5.5 V 3.1 x 1.8 x 1.3mm 3.1mm 1.8mm 1.3mm 70dB
N° de stock RS 189-8843
Référence fabricantMAX9201EUE+
3,60 €
Each (In a Pack of 5)
Unité
Low Power Surface Mount TSSOP Single Push-Pull 1 7ns 16 4.75 → 10.5 V 5.1 x 4.5 x 0.95mm 5.1mm 4.5mm 0.95mm 50µV/V
N° de stock RS 177-3173
Référence fabricantMCP6562T-E/MS
MarqueMicrochip
0,408 €
Each (In a Pack of 20)
Unité
Rail to Rail Surface Mount MSOP Dual Push-Pull 2 56ns 8 - 3 x 3 x 0.95mm 3mm 3mm 0.95mm 66dB
N° de stock RS 146-535
Référence fabricantMAX941CPA+
3,54 €
Each
Unité
General Purpose Through Hole PDIP Single - 1 - 8 3 V, 5 V 9.91 x 7.87 x 4.45mm 9.91mm 7.87mm 4.45mm 81.94dB
N° de stock RS 661-2684
Référence fabricantTLC3704IPWR
1,398 €
Each (In a Pack of 5)
Unité
Low Power Surface Mount TSSOP Single Push-Pull 4 2.7µs 14 5 V 5 x 4.4 x 1.15mm 5mm 4.4mm 1.15mm 84dB
N° de stock RS 162-5578
Référence fabricantTLC393QDRQ1
0,512 €
Each (On a Reel of 2500)
Unité
Low Power Surface Mount SOIC Single Open Drain 2 2.5µs 8 5 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 84dB
N° de stock RS 810-239
Référence fabricantLM393P
0,32 €
Each
Unité
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 -
N° de stock RS 145-4758
Référence fabricantLMV331SQ3T2G
0,072 €
Each (On a Reel of 3000)
Unité
General Purpose 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 -
N° de stock RS 760-9461
Référence fabricantTS3022IST
1,028 €
Each (In a Pack of 5)
Unité
High Speed Surface Mount MSOP Single Push-Pull 2 0.009µs 8 1.8 → 5 V 3.2 x 3.1 x 0.95mm 3.2mm 3.1mm 0.95mm 67dB
N° de stock RS 145-6951
Référence fabricantTLV3704CD
2,00 €
Each (In a Tube of 50)
Unité
Low Power Surface Mount SOIC Dual, Single Push-Pull 4 240µs 14 3 → 15 V 8.65 x 3.91 x 1.58mm 8.65mm 3.91mm 1.58mm 88dB
N° de stock RS 124-4530
Référence fabricantLM393N/NOPB
0,638 €
Each (In a Pack of 10)
Unité
Dual Through Hole PDIP Dual, Single Single Ended 1 1.3µs 8 2 → 36 V 10.16 x 6.6 x 4.57mm 10.16mm 6.6mm 4.57mm -
N° de stock RS 189-8888
Référence fabricantMAX913CSA+
4,815 €
Each (In a Pack of 2)
Unité
Low Power Surface Mount SOIC Dual, Single Complementary 1 - 8 5 → 10 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm 110dB
N° de stock RS 146-7275
Référence fabricantBU7232FVM-TR
MarqueROHM
1,21 €
Each (In a Pack of 25)
Unité
Low Power Surface Mount MSOP Single CMOS, Push-Pull 2 1.7µs 8 1.8 → 5.5 V 2.9 x 2.8 x 0.75mm 2.9mm 2.8mm 0.75mm 80dB
N° de stock RS 145-7305
Référence fabricantLM2901D
0,313 €
Each (In a Tube of 50)
Unité
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 -
N° de stock RS 661-2851
Référence fabricantTLC339ID
0,594 €
Each (In a Pack of 5)
Unité
Low Power Surface Mount SOIC Single Open Drain 4 2.5µs 14 5 V 8.65 x 3.91 x 1.58mm 8.65mm 3.91mm 1.58mm 84dB
N° de stock RS 796-8032
Référence fabricantLM2903N/NOPB
0,805 €
Each (In a Pack of 10)
Unité
Differential Through Hole PDIP Dual Open Collector, Open Drain 2 1.3µs 8 - 10.16 x 6.6 x 5.08mm 10.16mm 6.6mm 5.08mm -
N° de stock RS 787-8686
Référence fabricantLMV331SQ3T2G
0,072 €
Each (On a Tape of 20)
Unité
General Purpose 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 -
Nouveau
N° de stock RS 216-7805
Référence fabricantMAX40014ANS09+T
0,481 €
Each (On a Reel of 2500)
Unité
Low Power Surface Mount WLP Single - 1 - 4 1.7 V - - - - -