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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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. 165-4794
Mfr. Part No.MCP6562-E/SN
BrandMicrochip
R 9.017
Each (In a Tube of 100)
units
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 stock no. 669-6275
Mfr. Part No.MCP6562-E/SN
BrandMicrochip
R 11.832
Each (In a Pack of 5)
units
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 stock no. 768-1369
Mfr. Part No.MCP6541UT-E/OT
BrandMicrochip
R 3.917
Each (In a Pack of 10)
units
General Purpose Surface Mount SOT-23 Single Push-Pull 1 - 5 1.6 → 5.5 V 3.1 x 1.8 x 1.3mm 3.1mm 1.8mm 1.3mm 70dB
RS stock no. 912-2994
Mfr. Part No.MCP6561RT-E/OT
BrandMicrochip
R 6.393
Each (On a Reel of 3000)
units
General Purpose Surface Mount SOT-23 Single Push-Pull 1 0.02µs 5 1.8 → 5.5 V 3.1 x 1.8 x 1.3mm 3.1mm 1.8mm 1.3mm 65dB
RS stock no. 165-3327
Mfr. Part No.MCP6541UT-E/OT
BrandMicrochip
R 3.852
Each (On a Reel of 3000)
units
General Purpose Surface Mount SOT-23 Single Push-Pull 1 - 5 1.6 → 5.5 V 3.1 x 1.8 x 1.3mm 3.1mm 1.8mm 1.3mm 70dB
RS stock no. 669-6272
Mfr. Part No.MCP6564-E/SL
BrandMicrochip
R 23.83
Each (In a Pack of 5)
units
General Purpose Surface Mount SOIC Single Push-Pull 4 - 14 3 V, 5 V 8.65 x 3.9 x 1.25mm 8.65mm 3.9mm 1.25mm 66dB
RS stock no. 738-7026
Mfr. Part No.MCP6561RT-E/OT
BrandMicrochip
R 8.564
Each (In a Pack of 5)
units
General Purpose Surface Mount SOT-23 Single Push-Pull 1 0.02µs 5 1.8 to 5.5 V 3.1 x 1.8 x 1.3mm 3.1mm 1.8mm 1.3mm 65dB
RS stock no. 146-0133
Mfr. Part No.MCP6564-E/SL
BrandMicrochip
R 19.919
Each (In a Tube of 57)
units
General Purpose Surface Mount SOIC Single Push-Pull 4 - 14 3 V, 5 V 8.65 x 3.9 x 1.25mm 8.65mm 3.9mm 1.25mm 66dB
RS stock no. 738-7039
Mfr. Part No.MCP6564-E/ST
BrandMicrochip
R 24.10
Each (In a Pack of 2)
units
General Purpose Surface Mount TSSOP Single Push-Pull 4 0.02µs 14 1.8 to 5.5 V 5.1 x 4.5 x 1.05mm 5.1mm 4.50mm 1.05mm 65dB
RS stock no. 912-6766
Mfr. Part No.MCP6564-E/ST
BrandMicrochip
R 19.831
Each (In a Tube of 96)
units
General Purpose Surface Mount TSSOP Single Push-Pull 4 0.02µs 14 1.8 → 5.5 V 5.1 x 4.5 x 1.05mm 5.1mm 4.5mm 1.05mm 65dB
RS stock no. 402-790
Mfr. Part No.MCP6541-I/P
BrandMicrochip
R 7.789
Each (In a Pack of 10)
units
Low Power Through Hole PDIP Single Push-Pull 1 - 8 3 V, 5 V 9.27 x 6.35 x 3.3mm 9.27mm 6.35mm 3.3mm 70dB
RS stock no. 774-7532
Mfr. Part No.MCP6542-E/P
BrandMicrochip
R 9.568
Each (In a Bag of 10)
units
General Purpose Through Hole PDIP Single Push-Pull 2 - 8 1.6 to 5.5 V 0.4 x 0.28 x 0.195in 10.16mm 0.28in 4.95mm 70dB
RS stock no. 876-7186
Mfr. Part No.MCP6541-I/P
BrandMicrochip
R 6.385
Each (In a Tube of 60)
units
Low Power Through Hole PDIP Single Push-Pull 1 - 8 1.6 → 5.5 V 10.16 x 7.11 x 5.33mm 10.16mm 7.11mm 5.33mm 70dB
RS stock no. 145-9012
Mfr. Part No.MCP6542-E/P
BrandMicrochip
R 8.085
Each (In a Tube of 60)
units
General Purpose Through Hole PDIP Single Push-Pull 2 - 8 1.6 → 5.5 V 0.4 x 0.28 x 0.195in 10.16mm 0.28in 4.95mm 70dB
RS stock no. 770-7777
Mfr. Part No.MCP6546T-E/OT
BrandMicrochip
R 5.958
Each (On a Tape of 20)
units
General Purpose Surface Mount SOT-23 Single Open Drain 1 - 5 1.6 → 5.5 V 3.1 x 1.8 x 1.3mm 3.1mm 1.8mm 1.3mm 70dB
RS stock no. 165-3567
Mfr. Part No.MCP6546T-E/OT
BrandMicrochip
R 4.474
Each (On a Reel of 3000)
units
General Purpose Surface Mount SOT-23 Single Open Drain 1 - 5 1.6 → 5.5 V 3.1 x 1.8 x 1.3mm 3.1mm 1.8mm 1.3mm 70dB
RS stock no. 727-2347
Mfr. Part No.MCP65R46T-1202E/CHY
BrandMicrochip
R 7.142
Each (On a Tape of 10)
units
General Purpose Surface Mount SOT-23 Single Open Drain 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 stock no. 165-1899
Mfr. Part No.MCP6541RT-I/OT
BrandMicrochip
R 4.51
Each (On a Reel of 3000)
units
Low Power Surface Mount SOT-23 Single Push-Pull 1 0.85µs 5 1.6 → 5.5 V 3.1 x 1.8 x 1.3mm 3.1mm 1.8mm 1.3mm 70dB
RS stock no. 165-4625
Mfr. Part No.MCP6541T-I/OT
BrandMicrochip
R 4.519
Each (On a Reel of 3000)
units
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 stock no. 165-3304
Mfr. Part No.MCP65R46T-1202E/CHY
BrandMicrochip
R 5.508
Each (On a Reel of 3000)
units
General Purpose Surface Mount SOT-23 Single Open Drain 1 0.85µs 6 1.8 → 5.5 V 3.1 x 1.8 x 1.3mm 3.1mm 1.8mm 1.3mm 70dB