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 mountThrough holeComparator power supply types.DualSingleVarious 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. 517-2374
Mfr. Part No.LM2903D
HK$3.139
Each (In a Pack of 20)
units
Differential Surface Mount SOIC Dual, Single Open Collector 2 1.3µs 8 3 → 28 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm -
RS Stock No. 168-4869
Mfr. Part No.LM2901DR
HK$0.753
Each (On a Reel of 2500)
units
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 -
RS Stock No. 121-8305
Mfr. Part No.LM311P
HK$4.234
Each (In a Tube of 50)
units
General Purpose Through Hole PDIP Dual, Single Open Collector/Emitter 1 0.165µs 8 5 → 28 V 9.81 x 6.35 x 4.57mm 9.81mm 6.35mm 4.57mm -
RS Stock No. 517-2368
Mfr. Part No.LM2901D
HK$2.401
Each (In a Pack of 20)
units
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 -
RS Stock No. 162-8170
Mfr. Part No.INA300AIDSQT
HK$8.195
Each (On a Reel of 250)
units
Current Sense Surface Mount SON Single Open Drain 1 100µs 10 0 → 36 V 2.1 x 2.1 x 0.75mm 2.1mm 2.1mm 0.75mm 120dB
RS Stock No. 102-5746
Mfr. Part No.LM2903M/NOPB
HK$5.275
Each (In a Tube of 95)
units
Differential Surface Mount SOIC Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm -
RS Stock No. 687-9382
Mfr. Part No.MCP6561UT-E/OT
BrandMicrochip
HK$4.45
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
New
RS Stock No. 191-4002
Mfr. Part No.MAX9107ESA+
HK$17.113
Each (In a Tube of 100)
units
High Speed, Low Power Surface Mount SOIC Single TTL 2 - 8 4.5 5.5 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm 50µV/V
RS Stock No. 533-8388
Mfr. Part No.LMV339M/NOPB
HK$12.80
Each
units
General Purpose Surface Mount SOIC Single Open Collector 4 - 14 3 V 8.64 x 3.91 x 1.45mm 8.64mm 3.91mm 1.45mm -
New
RS Stock No. 190-6649
Mfr. Part No.MAX985EUK+T
HK$34.81
Each (In a Pack of 5)
units
Micro Power Comparator Surface Mount SOT-23 Dual, Single Push-Pull 1 - 5 2.5 → 5.5 V 3 x 1.75 x 1.3mm 3mm 1.75mm 1.3mm 80dB
RS Stock No. 810-0035
Mfr. Part No.ADCMP356YKSZ-REEL7
HK$6.07
Each (On a Tape of 10)
units
General Purpose Surface Mount SC-70 Single Push-Pull 1 30 ns, 45 ns 4 2.25 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm -
RS Stock No. 145-6795
Mfr. Part No.LT1671CS8#PBF
HK$22.394
Each (In a Tube of 100)
units
High Speed Surface Mount SOIC Dual, Single TTL 1 - 8 5 V 5.004 x 3.988 x 1.498mm 5mm 3.988mm 1.498mm 100dB
RS Stock No. 756-3202
Mfr. Part No.TC75S56F(TE85L,F)
BrandToshiba
HK$3.676
Each (In a Pack of 5)
units
General Purpose Surface Mount SSOP Single Push-Pull 1 0.06µs 5 3 → 5 V 2.9 x 1.6 x 1.1mm 2.9mm 1.6mm 1.1mm -
New
RS Stock No. 191-4003
Mfr. Part No.MAX921EPA+
HK$40.258
Each (In a Tube of 50)
units
- Through Hole PDIP Dual, Single CMOS, TTL 1 14µs 8 2.5 11 V 9.91 x 7.87 x 4.45mm 9.91mm 7.87mm 4.45mm 0.1mV/V
RS Stock No. 756-2805
Mfr. Part No.TA75W393FU(TE12L,F
BrandToshiba
HK$3.318
Each (In a Pack of 10)
units
General Purpose Surface Mount SSOP Dual Open Collector 2 1.3µs 8 - 2.9 x 2.8 x 1.1mm 2.9mm 2.8mm 1.1mm -
RS Stock No. 185-9050
Mfr. Part No.NCS2250SQ2T2G
HK$5.831
Each (In a Pack of 13)
units
High Speed Surface Mount SC-88A Single Rail to Rail 1 - 5 1.8 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 81dB
RS Stock No. 121-8745
Mfr. Part No.LM392N/NOPB
HK$9.384
Each (In a Tube of 40)
units
Low Power Through Hole MDIP - - - - 8 - 9.27 x 6.35 x 3.3mm 9.27mm 6.35mm 3.3mm -
RS Stock No. 774-3470
Mfr. Part No.LM2901NG
HK$3.28
Each (In a Pack of 10)
units
General Purpose Through Hole PDIP Dual, Single CMOS, TTL 4 1.3µs 14 36 V 19.56 x 6.6 x 3.68mm 19.56mm 6.6mm 3.68mm -
RS Stock No. 165-5280
Mfr. Part No.TS331ICT
HK$3.12
Each (On a Reel of 3000)
units
Low Voltage Surface Mount SC-70 Single Open Drain 1 - 5 1.6 → 5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 74dB
RS Stock No. 189-1959
Mfr. Part No.LM2904YST
HK$3.597
Each (In a Pack of 25)
units
Low Power Surface Mount MiniSO Single Swing 2 - 8 3 → 30 V 3.2 x 3.1 x 0.95mm 3.2mm 3.1mm 0.95mm -
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