Comparators

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 analogue to digital (ADC). Two supply voltages 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
  • Micropower
  • 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. 165-3301
FabrikantnummerMCP65R41T-1202E/CHY
FabrikantMicrochip
€ 0,28
Each (On a Reel of 3000)
Aantal stuks
General Purpose Surface Mount SOT-23 Single Push-Pull 1 0.85µs 6 1.8 → 5.5 V 3.1 x 1.8 x 1.3mm 3.1mm 1.8mm 1.3mm 70dB
RS-stocknr. 669-6275
FabrikantnummerMCP6562-E/SN
FabrikantMicrochip
€ 0,602
Each (In a Pack of 5)
Aantal stuks
General Purpose Surface Mount SOIC Single Push-Pull 2 - 8 3 V, 5 V 4.9 x 3.9 x 1.25mm 4.9mm 3.9mm 1.25mm 66dB
RS-stocknr. 159-7414
FabrikantnummerMCP6569-E/ST
FabrikantMicrochip
€ 0,787
Each (In a Tube of 96)
Aantal stuks
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-stocknr. 727-2334
FabrikantnummerMCP65R41T-1202E/CHY
FabrikantMicrochip
€ 0,364
Each (In a Pack of 10)
Aantal stuks
General Purpose Surface Mount SOT-23 Single Push-Pull 1 0.85µs 6 1.8 to 5.5 V 3.1 x 1.8 x 1.3mm 3.1mm 1.8mm 1.3mm 70dB
RS-stocknr. 920-3475
FabrikantnummerLM311D
€ 0,378
Each (In a Tube of 75)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single Open Collector/Emitter 1 0.165µs 8 5 → 28 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm -
RS-stocknr. 168-8801
FabrikantnummerTS881ILT
€ 0,492
Each (On a Reel of 3000)
Aantal stuks
Low Power Surface Mount SOT-23 Single Push-Pull 1 160ns 5 0.85 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 78dB
RS-stocknr. 860-7404
FabrikantnummerTS881ILT
€ 0,928
Each (In a Pack of 10)
Aantal stuks
Low Power Surface Mount SOT-23 Single Push-Pull 1 160ns 5 0.85 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 78dB
RS-stocknr. 436-8417
FabrikantnummerLM139J
€ 10,87
Each
Aantal stuks
Differential Through Hole CDIP Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 19.56 x 6.92 x 4.57mm 19.56mm 6.92mm 4.57mm -
RS-stocknr. 517-2396
FabrikantnummerLM311D
€ 0,378
Each (In a Pack of 20)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single Open Collector/Emitter 1 0.165µs 8 5 → 28 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm -
RS-stocknr. 528-157
FabrikantnummerLM311DR
€ 0,214
Each (In a Pack of 25)
Aantal stuks
General Purpose Surface Mount SOIC Dual, Single Open Collector/Emitter 1 0.165µs 8 5 → 28 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm -
RS-stocknr. 145-7092
FabrikantnummerLM139J
€ 9,305
Each (In a Tube of 25)
Aantal stuks
Differential Through Hole CDIP Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 19.56 x 6.92 x 4.57mm 19.56mm 6.92mm 4.57mm -
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. 858-411
FabrikantnummerLM339D
€ 0,36
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. 714-0770
FabrikantnummerLM311D
€ 0,249
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. 669-6212
FabrikantnummerMCP6541T-E/OT
FabrikantMicrochip
€ 0,305
Each (In a Pack of 10)
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. 912-6328
FabrikantnummerADCMP600BRJZ-R2
FabrikantAnalog Devices
€ 2,898
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. 709-5339
FabrikantnummerCMP04FSZ
FabrikantAnalog Devices
€ 13,45
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. 121-8827
FabrikantnummerLMV331M5/NOPB
€ 0,311
Each (On a Reel of 1000)
Aantal stuks
General Purpose Surface Mount SOT-23 Single Open Collector 1 - 5 3 V 2.92 x 1.6 x 1.02mm 2.92mm 1.6mm 1.02mm -
RS-stocknr. 877-2756
FabrikantnummerLM311DT
€ 0,282
Each (In a Pack of 25)
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. 810-239
FabrikantnummerLM393P
€ 0,38
Each
Aantal stuks
General Purpose Through Hole PDIP Dual, Single Open Collector 2 1.3µs 8 3 → 28 V 9.81 x 6.35 x 4.57mm 9.81mm 6.35mm 4.57mm -