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. 858-0627
Mfr. Part No.LTC1042CN8#PBF
kr 38,006
Each (In a Pack of 5)
Units
General Purpose Through Hole PDIP Single TTL - 80µs 8 18 V 10.16 x 6.47 x 3.3mm 10.16mm 6.47mm 3.3mm -
RS Stock No. 145-3273
Mfr. Part No.LM393DG
kr 2,433
Each (In a Tube of 98)
Units
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 Stock No. 145-7036
Mfr. Part No.LTC1042CN8#PBF
kr 25,404
Each (In a Tube of 50)
Units
General Purpose Through Hole PDIP Single TTL - 80µs 8 18 V 10.16 x 6.47 x 3.3mm 10.16mm 6.47mm 3.3mm -
RS Stock No. 463-139
Mfr. Part No.LM393DG
kr 2,68
Each (In a Pack of 25)
Units
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 Stock No. 506-0372
Mfr. Part No.LT1716CS5#TRMPBF
kr 22,174
Each (In a Pack of 5)
Units
General Purpose Surface Mount TSOT-23 Dual, Single Open Collector 1 - 5 3 → 28 V 2.9 x 1.75 x 0.9mm 2.9mm 1.75mm 0.9mm 110dB
RS Stock No. 669-6200
Mfr. Part No.MCP6541-E/SN
BrandMicrochip
kr 3,779
Each (In a Pack of 10)
Units
Low Power Surface Mount SOIC Single Push-Pull 1 - 8 3 V, 5 V 4.9 x 3.9 x 1.25mm 4.9mm 3.9mm 1.25mm 70dB
RS Stock No. 866-0219
Mfr. Part No.LM311N/NOPB
kr 6,107
Each (In a Tube of 40)
Units
General Purpose Through Hole PDIP Dual, Single DTL, MOS, RTL, TTL 1 200ns 8 5 V 10.16 x 6.6 x 4.57mm 10.16mm 6.6mm 4.57mm -
RS Stock No. 145-8957
Mfr. Part No.MCP6541-E/SN
BrandMicrochip
kr 2,851
Each (In a Tube of 100)
Units
Low Power Surface Mount SOIC Single Push-Pull 1 - 8 3 V, 5 V 4.9 x 3.9 x 1.25mm 4.9mm 3.9mm 1.25mm 70dB
RS Stock No. 124-4526
Mfr. Part No.LM311N/NOPB
kr 6,112
Each (In a Pack of 10)
Units
Voltage Through Hole PDIP Single Single Ended 1 200ns 8 Maximum of 36 V 10.16 x 6.6 x 4.57mm 10.16mm 6.6mm 4.57mm -
RS Stock No. 917-3523
Mfr. Part No.LT1716CS5#TRMPBF
kr 14,046
Each (On a Reel of 500)
Units
General Purpose Surface Mount TSOT-23 Dual, Single Open Collector 1 - 5 3 → 28 V 2.9 x 1.75 x 0.9mm 2.9mm 1.75mm 0.9mm 110dB
RS Stock No. 759-1553
Mfr. Part No.ADCMP573BCPZ-R2
kr 185,54
Each
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. 822-5840
Mfr. Part No.LT1711CMS8#PBF
kr 45,215
Each (In a Pack of 2)
Units
High Speed Surface Mount MSOP Dual, Single Rail to Rail 1 2ns 8 2.4 → 12 V 3 x 3 x 1.095mm 3mm 3mm 1.095mm 75dB
RS Stock No. 714-0833
Mfr. Part No.LM393DT
kr 2,528
Each (In a Pack of 20)
Units
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 Stock No. 145-7222
Mfr. Part No.LT1720CMS8#PBF
kr 45,134
Each (In a Tube of 50)
Units
High Speed Surface Mount MSOP Single Rail to Rail 2 2.5ns 8 2.7 → 6 V 3 x 3 x 0.9984mm 3mm 3mm 0.998mm 70dB
RS Stock No. 121-8421
Mfr. Part No.LM339N
kr 2,955
Each (In a Tube of 25)
Units
General Purpose Through Hole PDIP Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm 4.57mm -
RS Stock No. 533-8237
Mfr. Part No.LM339N/NOPB
kr 10,17
Each
Units
General Purpose Through Hole MDIP Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 19.05 x 6.35 x 3.3mm 19.05mm 6.35mm 3.3mm -
RS Stock No. 522-9408
Mfr. Part No.AD790JNZ
kr 105,08
Each
Units
General Purpose Through Hole PDIP Dual, Single TTL 1 - 8 5 V 9.27 x 7.24 x 3.43mm 9.27mm 7.24mm 3.43mm 95dB
RS Stock No. 920-0066
Mfr. Part No.LT1711CMS8#PBF
kr 30,365
Each (In a Tube of 50)
Units
High Speed Surface Mount MSOP Dual, Single Rail to Rail 1 2ns 8 2.4 → 12 V 3 x 3 x 1.095mm 3mm 3mm 1.095mm 75dB
RS Stock No. 146-0133
Mfr. Part No.MCP6564-E/SL
BrandMicrochip
kr 10,108
Each (In a Tube of 57)
Units
General Purpose Surface Mount SOIC Single Push-Pull 4 - 14 3 V, 5 V 8.65 x 3.9 x 1.25mm 8.65mm 3.9mm 1.25mm 66dB
RS Stock No. 159-7680
Mfr. Part No.ADCMP573BCPZ-R2
kr 141,823
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
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