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. 774-7532
Mfr. Part No.MCP6542-E/P
BrandMicrochip
PHP30.529
Each (In a Bag of 10)
units
General Purpose Through Hole PDIP Single Push-Pull 2 - 8 1.6 to 5.5 V 0.4 x 0.28 x 0.195in 10.16mm 0.28in 4.95mm 70dB
RS Stock No. 145-9012
Mfr. Part No.MCP6542-E/P
BrandMicrochip
PHP23.047
Each (In a Tube of 60)
units
General Purpose Through Hole PDIP Single Push-Pull 2 - 8 1.6 → 5.5 V 0.4 x 0.28 x 0.195in 10.16mm 0.28in 4.95mm 70dB
RS Stock No. 159-7414
Mfr. Part No.MCP6569-E/ST
BrandMicrochip
PHP63.00
Each (In a Tube of 96)
units
General Purpose Surface Mount TSSOP Single Open Drain 4 - 14 1.8 → 5.5 V 5.1 x 4.5 x 1.05mm 5.1mm 4.50mm 1.05mm 65dB
RS Stock No. 177-2874
Mfr. Part No.MCP6547T-E/MS
BrandMicrochip
PHP23.172
Each (On a Reel of 2500)
units
Rail to Rail Surface Mount MSOP Single Open Drain 2 4µs 8 - 3 x 3 x 0.95mm 3mm 3mm 0.95mm 70dB
RS Stock No. 145-9369
Mfr. Part No.MCP6547-E/SN
BrandMicrochip
PHP23.397
Each (In a Tube of 100)
units
General Purpose Surface Mount SOIC Single Open Drain 2 - 8 1.6 → 5.5 V 4.9 x 3.9 x 1.5mm 4.9mm 3.9mm 1.5mm 70dB
RS Stock No. 876-7186
Mfr. Part No.MCP6541-I/P
BrandMicrochip
PHP19.95
Each (In a Tube of 60)
units
Low Power Through Hole PDIP Single Push-Pull 1 - 8 1.6 → 5.5 V 10.16 x 7.11 x 5.33mm 10.16mm 7.11mm 5.33mm 70dB
RS Stock No. 165-3420
Mfr. Part No.MCP6561T-E/LT
BrandMicrochip
PHP20.539
Each (On a Reel of 3000)
units
General Purpose Surface Mount SC-70 Single Push-Pull 1 - 5 3 V, 5 V 2 x 1.25 x 1mm 2mm 1.25mm 1mm 66dB
RS Stock No. 687-8395
Mfr. Part No.MCP6561T-E/OT
BrandMicrochip
PHP28.80
Each
units
General Purpose Surface Mount SOT-23 Single Push-Pull 1 - 5 3 V, 5 V 3.1 x 1.8 x 1.3mm 3.1mm 1.8mm 1.3mm 66dB
RS Stock No. 687-9382
Mfr. Part No.MCP6561UT-E/OT
BrandMicrochip
PHP24.49
Each
units
General Purpose Surface Mount SOT-23 Single Push-Pull 1 - 5 3 V, 5 V 3.1 x 1.8 x 1.3mm 3.1mm 1.8mm 1.3mm 66dB
RS Stock No. 144-9090
Mfr. Part No.MCP6549-I/SL
BrandMicrochip
PHP53.03
Each (In a Tube of 57)
units
Low Power Surface Mount SOIC Single Open Drain 4 - 14 3 V, 5 V 8.65 x 3.9 x 1.25mm 8.65mm 3.9mm 1.25mm 70dB
RS Stock No. 876-7253
Mfr. Part No.MCP6547-I/P
BrandMicrochip
PHP25.704
Each (In a Tube of 60)
units
Low Power Through Hole PDIP Single Open Drain 2 - 8 1.6 → 5.5 V 10.16 x 7.11 x 5.33mm 10.16mm 7.11mm 5.33mm 70dB
RS Stock No. 144-5793
Mfr. Part No.MCP6566UT-E/OT
BrandMicrochip
PHP20.539
Each (On a Reel of 3000)
units
General Purpose Surface Mount SOT-23 Single Open Drain 1 - 5 3 V, 5 V 3.1 x 1.8 x 1.3mm 3.1mm 1.8mm 1.3mm 66dB
RS Stock No. 687-8398
Mfr. Part No.MCP6566T-E/OT
BrandMicrochip
PHP27.32
Each
units
General Purpose Surface Mount SOT-23 Single Open Drain 1 - 5 3 V, 5 V 3.1 x 1.8 x 1.3mm 3.1mm 1.8mm 1.3mm 66dB
RS Stock No. 768-1362
Mfr. Part No.MCP6541UT-I/LT
BrandMicrochip
PHP18.90
Each (In a Pack of 10)
units
General Purpose Surface Mount SC-70 Single Push-Pull 1 - 5 1.6 → 5.5 V 2.25 x 1.35 x 1mm 2.25mm 1.35mm 1mm 70dB
RS Stock No. 911-3253
Mfr. Part No.MIC841LYMT-T5
BrandMicrochip
PHP31.793
Each (In a Pack of 10)
units
Micro Power Comparator Surface Mount TDFN Single Push-Pull 1 - 6 1.5 → 5.5 V 1.6 x 1.6 x 0.5mm 1.6mm 1.6mm 0.5mm -
RS Stock No. 177-3156
Mfr. Part No.MCP6547T-E/MS
BrandMicrochip
PHP27.37
Each (In a Pack of 20)
units
Rail to Rail Surface Mount MSOP Single Open Drain 2 4µs 8 - 3 x 3 x 0.95mm 3mm 3mm 0.95mm 70dB
RS Stock No. 770-7777
Mfr. Part No.MCP6546T-E/OT
BrandMicrochip
PHP18.90
Each (On a Tape of 20)
units
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
RS Stock No. 912-2702
Mfr. Part No.MCP6541T-I/LT
BrandMicrochip
PHP14.18
Each (On a Reel of 3000)
units
General Purpose Surface Mount SC-70 Single Push-Pull 1 - 5 1.6 → 5.5 V 2.25 x 1.35 x 1mm 2.25mm 1.35mm 1mm 70dB
RS Stock No. 165-4713
Mfr. Part No.MCP6547-I/SN
BrandMicrochip
PHP23.172
Each (In a Tube of 100)
units
Low Power Surface Mount SOIC Single Open Drain 2 - 8 3 V, 5 V 4.9 x 3.9 x 1.25mm 4.9mm 3.9mm 1.25mm 70dB
RS Stock No. 768-1378
Mfr. Part No.MCP6546UT-E/OT
BrandMicrochip
PHP17.29
Each (In a Pack of 10)
units
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