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. 177-3173
Mfr. Part No.MCP6562T-E/MS
HK$5.673
Each (In a Pack of 20)
units
Rail to Rail Surface Mount MSOP Dual Push-Pull 2 56ns 8 - 3 x 3 x 0.95mm 3mm 3mm 0.95mm 66dB
RS Stock No. 177-2874
Mfr. Part No.MCP6547T-E/MS
HK$3.82
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. 177-2935
Mfr. Part No.MIC842LYC5-TR
HK$3.64
Each (On a Reel of 3000)
units
Voltage Surface Mount SC-70 Single Push-Pull 1 12µs 5 - 1.8 x 1.15 x 0.8mm 1.8mm 1.15mm 0.8mm -
RS Stock No. 177-3344
Mfr. Part No.MIC6270YM5-TR
HK$2.284
Each (In a Pack of 50)
units
CMOS Surface Mount SOT-23 Single Open Collector 1 300ns 5 - 2.9 x 1.6 x 1.1mm 2.9mm 1.6mm 1.1mm -
RS Stock No. 177-2936
Mfr. Part No.MIC842NYC5-TR
HK$3.844
Each (On a Reel of 3000)
units
Voltage Surface Mount SC-70 Single Open Drain 1 12µs 5 - 1.8 x 1.15 x 0.8mm 1.8mm 1.15mm 0.8mm -
RS Stock No. 177-3305
Mfr. Part No.MIC842LYC5-TR
HK$4.466
Each (In a Pack of 20)
units
Voltage Surface Mount SC-70 Single Push-Pull 1 12µs 5 - 1.8 x 1.15 x 0.8mm 1.8mm 1.15mm 0.8mm -
RS Stock No. 177-2875
Mfr. Part No.MCP6562T-E/MS
HK$4.68
Each (On a Reel of 2500)
units
Rail to Rail Surface Mount MSOP Dual Push-Pull 2 56ns 8 - 3 x 3 x 0.95mm 3mm 3mm 0.95mm 66dB
RS Stock No. 177-2934
Mfr. Part No.MIC842HYC5-TR
HK$3.64
Each (On a Reel of 3000)
units
Voltage Surface Mount SC-70 Single Push-Pull 1 12µs 5 - 1.8 x 1.15 x 0.8mm 1.8mm 1.15mm 0.8mm -
RS Stock No. 177-2928
Mfr. Part No.MIC6270YM5-TR
HK$2.107
Each (On a Reel of 3000)
units
CMOS Surface Mount SOT-23 Single Open Collector 1 300ns 5 - 2.9 x 1.6 x 1.1mm 2.9mm 1.6mm 1.1mm -
RS Stock No. 177-3288
Mfr. Part No.MIC842HYC5-TR
HK$4.466
Each (In a Pack of 20)
units
Voltage Surface Mount SC-70 Single Push-Pull 1 12µs 5 - 1.8 x 1.15 x 0.8mm 1.8mm 1.15mm 0.8mm -
RS Stock No. 177-3156
Mfr. Part No.MCP6547T-E/MS
HK$4.587
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. 177-3322
Mfr. Part No.MIC842NYC5-TR
HK$4.466
Each (In a Pack of 20)
units
Voltage Surface Mount SC-70 Single Open Drain 1 12µs 5 - 1.8 x 1.15 x 0.8mm 1.8mm 1.15mm 0.8mm -