Comparators

What is a Comparator?

A Comparator is a circuit which accepts two voltages or currents and then switches the output showing which is bigger. Comparators are found in components like analogue to digital converters. Comparators are like operational amplifiers except a comparator is designed 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 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 analog to digital (ADC). Two supply voltage 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, Micro power, Nano power, Precision, Push/pull output, Quad differential, Rail to rail, Voltage, Window.

Mounting Types.
Surface mount
Through hole
Comparator power supply types.
Dual
Single

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 Price 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 Stock No. 159-7680
Mfr. Part No.ADCMP573BCPZ-R2
SGD27.78
Each (On a Reel of 250)
units
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
RS Stock No. 165-4794
Mfr. Part No.MCP6562-E/SN
BrandMicrochip
SGD0.832
Each (In a Tube of 100)
units
General Purpose Surface Mount SOIC Single Push-Pull 2 - 8 3 V, 5 V 4.9 x 3.9 x 1.25mm 4.9mm 3.9mm 1.25mm 66dB
RS Stock No. 177-7176
Mfr. Part No.CMP04FSZ
SGD16.76
Each (In a Tube of 56)
units
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 100dB
RS Stock No. 171-6288
Mfr. Part No.BU7232F-E2
BrandROHM
SGD0.664
Each (In a Pack of 10)
units
Low Voltage CMOS Surface Mount SOP Dual, Single Push-Pull 2 1.7µs 8 1.8 → 5.5 V 5 x 4.4 x 1.5mm 5mm 4.4mm 1.5mm 80dB
New
RS Stock No. 189-7334
Mfr. Part No.MAX913ESA+
BrandMaxim
SGD7.475
Each (In a Tube of 100)
units
Low Power Surface Mount SOIC Dual, Single Complementary 1 - 8 5 → 10 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm 110dB
RS Stock No. 179-1628
Mfr. Part No.TLC3702ID
SGD2.382
Each (In a Tube of 75)
units
Low Power Surface Mount SOIC Single Push-Pull 2 - 8 5 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 84dB
RS Stock No. 171-5774
Mfr. Part No.BU7251SG-TR
BrandROHM
SGD0.41
Each (On a Reel of 3000)
units
High Speed CMOS Surface Mount SSOP Dual, Single Push-Pull 1 0.55µs 5 1.8 → 5.5 V 2.9 x 1.6 x 1.1mm 2.9mm 1.6mm 1.1mm 80dB
RS Stock No. 168-8081
Mfr. Part No.TS884IQ4T
SGD1.689
Each (On a Reel of 3000)
units
Low Power Surface Mount QFN Single Push-Pull 4 - 16 1.1 → 5.5 V 3.15 x 3.15 x 0.95mm 3.15mm 3.15mm 0.95mm 78dB
RS Stock No. 151-3322
Mfr. Part No.LTC6752ISC6-1#TRMPBF
SGD6.40
Each (In a Pack of 2)
units
High Speed Surface Mount SC-70 Single CMOS 1 - 6 Maximum of 3.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 70dB
RS Stock No. 923-6753
Mfr. Part No.TLV3702IDGK
SGD2.42
Each (In a Tube of 80)
units
Low Power Surface Mount MSOP Dual, Single Push-Pull 2 240µs 8 3 → 15 V 3 x 3 x 0.97mm 3mm 3mm 0.97mm 88dB
RS Stock No. 536-0414
Mfr. Part No.LMV761MF/NOPB
SGD1.70
Each (In a Pack of 5)
units
Low Voltage Surface Mount SOT-23 Single Push-Pull 1 - 6 3 V 2.92 x 1.6 x 1.02mm 2.92mm 1.6mm 1.02mm 100dB
RS Stock No. 786-9730
Mfr. Part No.LT6700CS6-1#TRMPBF
SGD3.86
Each (In a Pack of 2)
units
General Purpose Surface Mount TSOT-23 Single Open Collector 2 24µs 6 1.4 → 18 V 2.9 x 1.75 x 0.9mm 2.9mm 1.75mm 0.9mm -
RS Stock No. 829-1532
Mfr. Part No.TS884IQ4T
SGD1.84
Each (In a Pack of 5)
units
Low Power Surface Mount QFN Single Push-Pull 4 - 16 1.1 → 5.5 V 3.15 x 3.15 x 0.95mm 3.15mm 3.15mm 0.95mm 78dB
New
RS Stock No. 190-4392
Mfr. Part No.MAX998ESA+
BrandMaxim
SGD5.071
Each (In a Tube of 100)
units
High Speed, Low Power Surface Mount SO Single Rail to Rail 1 - 8 2.7 → 5.5 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm 95dB
RS Stock No. 122-0108
Mfr. Part No.LM2903DR2G
SGD0.116
Each (On a Reel of 2500)
units
General Purpose Surface Mount SOIC Dual, Single Open Collector 2 1.5µs 8 3 to 28 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS Stock No. 774-1284
Mfr. Part No.TLV3201AIDCKT
SGD1.914
Each (In a Bag of 5)
units
Low Power Surface Mount SC-70 Single Push-Pull 1 - 5 2.7 → 5.5 V 2.15 x 1.4 x 1mm 2.15mm 1.4mm 1mm 70dB
RS Stock No. 786-1326
Mfr. Part No.MAX961EUA+
BrandMaxim
SGD6.20
Each
units
High Speed Surface Mount μMAX Single Rail to Rail 1 - 8 3 → 5 V 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 0.1mV/V
RS Stock No. 732-7163
Mfr. Part No.MAX903CSA+
BrandMaxim
SGD13.10
Each
units
High Speed, Low Power Surface Mount SOIC Single Push-Pull 1 ±0.008µs 8 5 → 10 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm 120µV/V
RS Stock No. 914-2973
Mfr. Part No.LM393APSR
SGD0.305
Each (In a Pack of 25)
units
Dual Differential Surface Mount SOIC Dual, Single CMOS, MOS, Open Collector, Open Drain, TTL 2 1.3µs 8 Maximum of 36 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS Stock No. 732-7185
Mfr. Part No.MAX913ESA+
BrandMaxim
SGD9.67
Each
units
Low Power Surface Mount SOIC Dual, Single Complementary 1 - 8 5 → 10 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm 110dB
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