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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Omschrijving Prijs 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-stocknr. 163-2404
FabrikantnummerLM2903DG
FabrikantON Semiconductor
€ 0,271
Each (In a Tube of 98)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS-stocknr. 463-656
FabrikantnummerLM2903DG
FabrikantON Semiconductor
€ 0,298
Each (In a Pack of 25)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS-stocknr. 912-6328
FabrikantnummerADCMP600BRJZ-R2
FabrikantAnalog Devices
€ 3,01
Each (On a Reel of 250)
Aantal stuks
General Purpose Surface Mount SOT-23 Single - 1 - 5 3 V, 5 V 2.9 x 1.6 x 1.15mm 2.9mm 1.6mm 1.15mm 50dB
RS-stocknr. 669-6200
FabrikantnummerMCP6541-E/SN
FabrikantMicrochip
€ 0,404
Each (In a Pack of 10)
Aantal stuks
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-stocknr. 153-3522
FabrikantnummerLTC1440CN8#PBF
FabrikantAnalog Devices
€ 2,062
Each (In a Tube of 50)
Aantal stuks
Low Power Through Hole PDIP Dual, Single - 1 - 8 3 → 9 V 10.16 x 6.48 x 3.3mm 10.16mm 6.48mm 3.3mm 80dB
RS-stocknr. 709-5339
FabrikantnummerCMP04FSZ
FabrikantAnalog Devices
€ 13,75
Each
Aantal stuks
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-stocknr. 160-3349
FabrikantnummerAD8468WBKSZ-R7
FabrikantAnalog Devices
€ 1,07
Each (On a Reel of 3000)
Aantal stuks
Low Power Surface Mount SC-70 Single CMOS, Rail to Rail, TTL 1 45ns 6 2.5 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 45dB
RS-stocknr. 168-6808
FabrikantnummerLM311D
€ 0,14
Each (In a Tube of 100)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single Open Collector 1 0.2µs 8 9 → 28 V 5 x 4 x 1.25mm 5mm 4mm 1.25mm -
RS-stocknr. 858-411
FabrikantnummerLM339D
€ 0,38
Each
Aantal stuks
General Purpose 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-stocknr. 866-0231
FabrikantnummerLM393P
€ 0,309
Each (In a Tube of 50)
Aantal stuks
General Purpose Through Hole PDIP Dual, Single CMOS, MOS, Open Collector, TTL 2 1.3µs 8 2 → 36 V 10.16 x 6.6 x 4.57mm 10.16mm 6.6mm 4.57mm -
RS-stocknr. 145-9533
FabrikantnummerLM311DT
€ 0,105
Each (On a Reel of 2500)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single DTL, RTL, TTL 1 200ns 8 5 V 5 x 4 x 1.65mm 5mm 4mm 1.65mm -
RS-stocknr. 162-6568
FabrikantnummerLM393ADGKR
€ 0,078
Each (On a Reel of 2500)
Aantal stuks
General Purpose Surface Mount VSSOP Dual, Single Open Collector 2 1.3µs 8 2 → 36 V 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm -
RS-stocknr. 165-4624
FabrikantnummerMCP6541T-E/OT
FabrikantMicrochip
€ 0,242
Each (On a Reel of 3000)
Aantal stuks
Low Power 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 70dB
RS-stocknr. 714-0770
FabrikantnummerLM311D
€ 0,276
Each (In a Pack of 20)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single Open Collector 1 0.2µs 8 9 → 28 V 5 x 4 x 1.25mm 5mm 4mm 1.25mm -
RS-stocknr. 528-343
FabrikantnummerLM393DR
€ 0,227
Each (In a Pack of 25)
Aantal stuks
General Purpose 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-stocknr. 900-9879
FabrikantnummerTLV1701AIDBVT
€ 1,16
Each (In a Pack of 5)
Aantal stuks
Low Power Surface Mount SOT-23 Dual, Single Open Collector 1 - 5 2.2 → 36 V 3.05 x 1.75 x 1.3mm 3.05mm 1.75mm 1.3mm -
RS-stocknr. 178-4788
FabrikantnummerLM339DG
FabrikantON Semiconductor
€ 0,27
Each (In a Tube of 55)
Aantal stuks
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 -
RS-stocknr. 179-2050
FabrikantnummerLM139D
€ 1,253
Each (In a Tube of 50)
Aantal stuks
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-stocknr. 922-2173
FabrikantnummerLMC7211AIM5/NOPB
€ 0,59
Each (On a Reel of 1000)
Aantal stuks
Low Power Surface Mount SOT-23 Dual Push-Pull 1 4µs 5 - 2.92 x 1.6 x 1.02mm 2.92mm 1.6mm 1.02mm 75dB
RS-stocknr. 536-1085
FabrikantnummerLM2903M/NOPB
€ 0,738
Each (In a Pack of 20)
Aantal stuks
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 -
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