Comparators

A Comparator is a circuit that accepts two voltages or currents and then switches the output showing which of the two is bigger. Comparators are found in components such as analogue to digital converters (ADCs). Comparators are like operational amplifiers except a comparator is designed specifically 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 either 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

Comparators can be found in both surface mount and through-hole mounting configurations to enable use in a wide variety of applications.

Comparator power supply types

Available in both single and dual power supply configurations, a comparator can easily be implemented into a robust solution.

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. 184-8640
FabrikantnummerBA82901YF-CE2
FabrikantROHM
€ 1,223
Each (In a Pack of 10)
Aantal stuks
- Surface Mount SOP Single - 3 1.3µs 8 2 → 36 V 5 x 4.4 x 1.5mm 5mm 4.4mm 1.5mm -
RS-stocknr. 184-8643
FabrikantnummerBU7230SG-TR
FabrikantROHM
€ 0,767
Each (In a Pack of 25)
Aantal stuks
Low Current CMOS Surface Mount SSOP Dual, Single Open Drain 1 - 5 1.8 → 5.5 V 2.9 x 1.6 x 1.1mm 2.9mm 1.6mm 1.1mm 80dB
RS-stocknr. 131-2778
FabrikantnummerBU7251G-TR
FabrikantROHM
€ 1,036
Each (In a Pack of 10)
Aantal stuks
High Speed CMOS Surface Mount SSOP Dual, Single Push-Pull 1 0.55µs 5 1.8 → 5.5 V 2.9 x 1.6 x 1.1mm 2.9mm 1.6mm 1.1mm 80dB
RS-stocknr. 146-7275
FabrikantnummerBU7232FVM-TR
FabrikantROHM
€ 1,451
Each (In a Pack of 25)
Aantal stuks
Low Power Surface Mount MSOP Single CMOS, Push-Pull 2 1.7µs 8 1.8 → 5.5 V 2.9 x 2.8 x 0.75mm 2.9mm 2.8mm 0.75mm 80dB
RS-stocknr. 171-6305
FabrikantnummerBA2901SF-E2
FabrikantROHM
€ 0,717
Each (In a Pack of 20)
Aantal stuks
- Surface Mount SOP Dual, Single Open Collector 4 1.3µs 14 2 → 36 V 8.7 x 4.4 x 1.5mm 8.7mm 4.4mm 1.5mm -
RS-stocknr. 171-6280
FabrikantnummerLM2903FJ-E2
FabrikantROHM
€ 0,488
Each (In a Pack of 25)
Aantal stuks
- Surface Mount SOP-J Dual, Single Open Collector 2 1µs 8 3 → 32 V 4.9 x 3.9 x 1.37mm 4.9mm 3.9mm 1.37mm -
RS-stocknr. 184-8657
FabrikantnummerBA82903YF-CE2
FabrikantROHM
€ 0,987
Each (In a Pack of 10)
Aantal stuks
- Surface Mount SOP Single - 2 1.3µs 8 2 → 36 V 5 x 4.4 x 1.5mm 5mm 4.4mm 1.5mm -
RS-stocknr. 133-3216
FabrikantnummerLM393DT
FabrikantROHM
€ 0,515
Each (In a Pack of 10)
Aantal stuks
General Purpose Surface Mount SOP Dual, Single Open Collector 2 300ns 8 2 → 36 V 4.9 x 3.9 x 1.37mm 4.9mm 3.9mm 1.37mm -
RS-stocknr. 171-5752
FabrikantnummerLM2903FJ-E2
FabrikantROHM
€ 0,211
Each (On a Reel of 2500)
Aantal stuks
- Surface Mount SOP-J Dual, Single Open Collector 2 1µs 8 3 → 32 V 4.9 x 3.9 x 1.37mm 4.9mm 3.9mm 1.37mm -
RS-stocknr. 171-6233
FabrikantnummerLM393FVM-TR
FabrikantROHM
€ 0,37
Each (In a Pack of 25)
Aantal stuks
- Surface Mount MSOP Dual, Single Open Collector 2 1µs 8 3 → 32 V 2.9 x 2.8 x 0.75mm 2.9mm 2.8mm 0.75mm -
RS-stocknr. 171-5803
FabrikantnummerBA2901SF-E2
FabrikantROHM
€ 0,305
Each (On a Reel of 2500)
Aantal stuks
- Surface Mount SOP Dual, Single Open Collector 4 1.3µs 14 2 → 36 V 8.7 x 4.4 x 1.5mm 8.7mm 4.4mm 1.5mm -
RS-stocknr. 171-6229
FabrikantnummerBU7250G-TR
FabrikantROHM
€ 0,543
Each (In a Pack of 20)
Aantal stuks
Low Current CMOS Surface Mount SSOP Dual, Single Open Drain 1 0.75µs 5 1.8 → 5.5 V 2.9 x 1.6 x 1.1mm 2.9mm 1.6mm 1.1mm 80dB
RS-stocknr. 171-6239
FabrikantnummerBU5255HFV-TR
FabrikantROHM
€ 0,536
Each (In a Pack of 20)
Aantal stuks
Low Current CMOS Surface Mount HVSOF Dual, Single Push-Pull 1 1.6µs 5 1.8 → 5.5 V 1.6 x 1.2 x 0.58mm 1.6mm 1.2mm 0.58mm 80dB
RS-stocknr. 168-1886
FabrikantnummerBA2903FV-E2
FabrikantROHM
€ 0,764
Each (In a Pack of 25)
Aantal stuks
- Surface Mount SSOP Dual, Single Open Collector 2 1.3µs 8 36 V 3 x 4.4 x 1.5mm 3mm 4.4mm 1.5mm -
RS-stocknr. 171-6327
FabrikantnummerLM393FVJ-E2
FabrikantROHM
€ 0,454
Each (In a Pack of 25)
Aantal stuks
- Surface Mount TSSOP-BJ Dual, Single Open Collector 2 1µs 8 3 → 32 V 3 x 3 x 0.85mm 3mm 3mm 0.85mm -
RS-stocknr. 184-8660
FabrikantnummerBA2903YFV-CE2
FabrikantROHM
€ 0,526
Each (In a Pack of 10)
Aantal stuks
- Surface Mount SSOP Single - 2 1.3µs 8 2 → 36 V 4.4 x 3 x 1.15mm 4.4mm 3mm 1.15mm -
RS-stocknr. 168-1884
FabrikantnummerBA2901FV-E2
FabrikantROHM
€ 0,72
Each (In a Pack of 25)
Aantal stuks
- Surface Mount SSOP Dual, Single Open Collector 4 1.3µs 14 36 V 5 x 4.4 x 1.05mm 5mm 4.4mm 1.05mm -
RS-stocknr. 171-6247
FabrikantnummerBU5265HFV-TR
FabrikantROHM
€ 0,536
Each (In a Pack of 25)
Aantal stuks
Push-Pull Output Surface Mount HVSOF Dual, Single Push-Pull 1 0.5µs 5 1.8 → 5.5 V 1.6 x 1.2 x 0.58mm 1.6mm 1.2mm 0.58mm 80dB
RS-stocknr. 168-1984
FabrikantnummerBA2903F-E2
FabrikantROHM
€ 0,465
Each (In a Pack of 25)
Aantal stuks
- Surface Mount SOP Dual, Single Open Collector 2 1.3µs 8 36 V 5 x 4.4 x 1.39mm 5mm 4.4mm 1.39mm -
RS-stocknr. 184-8654
FabrikantnummerBU7232YFVM-CTR
FabrikantROHM
€ 0,798
Each (In a Pack of 10)
Aantal stuks
Low Current CMOS Surface Mount MSOP Dual, Single Push-Pull 2 - 8 1.8 → 5.5 V 2.9 x 2.8 x 0.75mm 2.9mm 2.8mm 0.75mm 80dB