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 191-4678
Référence fabricantMAX9034AUD+
1,11 €
Each (In a Pack of 10)
Unité
Dual Surface Mount TSSOP Single Rail to Rail 4 - 14 +2.5 → +5.5 V 5.1 x 4.5 x 0.95mm 5.1mm 4.5mm 0.95mm 100dB
N° de stock RS 171-6239
Référence fabricantBU5255HFV-TR
MarqueROHM
0,446 €
Each (In a Pack of 20)
Unité
Low Current CMOS Surface Mount HVSOF Dual, Single Push-Pull 1 1.6µs 5 1.8 → 5.5 V 1.6 x 1.2 x 0.58mm 1.6mm 1.2mm 0.58mm 80dB
N° de stock RS 189-9194
Référence fabricantMAX964EEE+
6,46 €
Each (In a Pack of 2)
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Low Power Surface Mount QSOP Single CMOS, TTL 4 - 16 +5 V 4.98 x 3.99 x 1.49mm 4.98mm 3.99mm 1.49mm 1.0mV/V
N° de stock RS 189-7331
Référence fabricantMAX9119EXK+T
0,863 €
Each (On a Reel of 2500)
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Low Power Surface Mount SC-70 Single Push-Pull 1 1.6µs 5 1.8 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 0.5mV/V
N° de stock RS 738-7020
Référence fabricantMCP6562-E/MS
MarqueMicrochip
0,632 €
Each (In a Pack of 5)
Unité
General Purpose Surface Mount MSOP Single Push-Pull 2 0.02µs 8 1.8 → 5.5 V 3 x 3 x 0.95mm 3mm 3mm 0.95mm 65dB
N° de stock RS 810-0038
Référence fabricantADCMP350YKSZ-REEL7
0,734 €
Each (On a Tape of 10)
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General Purpose Surface Mount SC-70 Single Open Drain 1 30 ns, 45 ns 4 2.25 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm -
N° de stock RS 708-9766
Référence fabricantADCMP567BCPZ
7,12 €
Each
Unité
High Speed Surface Mount LFCSP Dual Complementary 2 - 32 - 5 x 5 x 0.83mm 5mm 5mm 0.83mm 69dB
N° de stock RS 814-3786
Référence fabricantSM72375MME/NOPB
1,838 €
Each (On a Tape of 5)
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General Purpose Surface Mount VSSOP Single Open Drain 2 0.3µs 8 2.7 → 15 V 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 75dB
N° de stock RS 168-1886
Référence fabricantBA2903FV-E2
MarqueROHM
0,637 €
Each (In a Pack of 25)
Unité
- Surface Mount SSOP Dual, Single Open Collector 2 1.3µs 8 36 V 3 x 4.4 x 1.5mm 3mm 4.4mm 1.5mm -
N° de stock RS 189-7355
Référence fabricantMAX951ESA+
2,774 €
Each (In a Tube of 100)
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Low Power Surface Mount SOIC - Rail to Rail, Swing - 22µs 8 - 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
N° de stock RS 528-365
Référence fabricantLM2901DR
0,226 €
Each (In a Pack of 25)
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 538-4965
Référence fabricantADCMP561BRQZ
5,13 €
Each
Unité
General Purpose Surface Mount QSOP Dual Complementary 2 - 16 - 5 x 3.91 x 1.65mm 5mm 3.91mm 1.65mm 80dB
N° de stock RS 159-7680
Référence fabricantADCMP573BCPZ-R2
13,348 €
Each (On a Reel of 250)
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High Speed Surface Mount LFCSP VQ Single RSPECL 1 0.000165µs 16 3.3 → 5.2 V 3 x 3 x 0.95mm 3mm 3mm 0.95mm 65dB
N° de stock RS 189-7334
Référence fabricantMAX913ESA+
3,894 €
Each (In a Tube of 100)
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 189-8737
Référence fabricantMAX9142ESA+T
2,262 €
Each (In a Pack of 5)
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Low Power Surface Mount SOIC Dual Push-Pull 2 - 8 - 5 x 4 x 1.5mm 5mm 4mm 4mm 80µV/V
Nouveau
N° de stock RS 212-3261
Référence fabricantMAX49140AXK/V+T
1,005 €
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High Speed Through Hole SC-70 Single Push-Pull 1 0.03µs 5 3 V - - - - -
N° de stock RS 517-0564
Référence fabricantLP2901D
0,618 €
Each (In a Pack of 5)
Unité
General Purpose Surface Mount SOIC Single Open Collector 4 8µs 14 5 → 28 V 8.65 x 3.91 x 1.58mm 8.65mm 3.91mm 1.58mm -
N° de stock RS 761-5873
Référence fabricantLM361N/NOPB
2,254 €
Each (In a Pack of 5)
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High Speed Through Hole PDIP Dual TTL 2 0.02µs 14 - 19.56 x 6.35 x 3.429mm 19.56mm 6.35mm 3.43mm -
N° de stock RS 171-5752
Référence fabricantLM2903FJ-E2
MarqueROHM
0,211 €
Each (On a Reel of 2500)
Unité
- Surface Mount SOP-J Dual, Single Open Collector 2 1µs 8 3 → 32 V 4.9 x 3.9 x 1.37mm 4.9mm 3.9mm 1.37mm -
N° de stock RS 172-3300
Référence fabricantTL331VSN4T3G
0,246 €
Each (On a Reel of 3000)
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Low Power Surface Mount TSOP Dual, Single CMOS, DTL, ECL, TTL 1 - 5 2 → 36 V 3.15 x 1.65 x 1mm 3.15mm 1.65mm 1mm -