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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제품설명 단가 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
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Low Power Through Hole PDIP Single Push-Pull 2 - 8 5 → 9 V 8.8 x 6.4 x 3.4mm 8.8mm 6.4mm 3.4mm 82dB
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General Purpose Surface Mount SSOP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 3.5 x 4.4 x 1.15mm 3.5mm 4.4mm 1.15mm -
RS 제품 번호 178-2405
제조사 부품 번호NJM2903M
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₩482.05
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General Purpose Surface Mount DMP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 5 x 5 x 1.6mm 5mm 5mm 1.6mm -
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₩716.10
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General Purpose Surface Mount VSP Dual, Single Open Collector/Emitter 2 0.8µs 8 3 → 18 V 2.9 x 2.8 x 1.1mm 2.9mm 2.8mm 1.1mm -
RS 제품 번호 740-5083
제조사 부품 번호NJM12903V-TE1
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₩544.05
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General Purpose Surface Mount SSOP Single Open Collector 2 0.5µs 8 3 → 12 V 3.5 x 4.4 x 1.15mm 3.5mm 4.4mm 1.15mm -
RS 제품 번호 657-0993
제조사 부품 번호NJM2403D
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₩1,142.35
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General Purpose Through Hole PDIP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 8.8 x 6.4 x 3.4mm 8.8mm 6.4mm 3.4mm -
RS 제품 번호 178-2406
제조사 부품 번호NJM2903E
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₩500.65
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General Purpose Surface Mount EMP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 5 x 3.9 x 1.5mm 5mm 3.9mm 1.5mm -
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제조사 부품 번호NJM2903MZ-TE1
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General Purpose Surface Mount DMP Single Open Collector 2 1.5µs 8 2 → 36 V 5 x 5 x 1.6mm 5mm 5mm 1.6mm -
RS 제품 번호 178-2436
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General Purpose Surface Mount SOT-23 Single Push-Pull 1 - 5 3 V 2.9 x 1.6 x 1.1mm 2.9mm 1.6mm 1.1mm 50dB
RS 제품 번호 169-8167
제조사 부품 번호NJM2903V-TE1
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₩300.70
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General Purpose Surface Mount SSOP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 3.5 x 4.4 x 1.15mm 3.5mm 4.4mm 1.15mm -
RS 제품 번호 178-2409
제조사 부품 번호NJU7102AM
제조사New Japan Radio
₩2,754.35
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Low Power Surface Mount DMP Single Push-Pull 2 - 8 5 → 9 V 5 x 5 x 1.6mm 5mm 5mm 1.6mm 82dB
RS 제품 번호 178-2403
제조사 부품 번호NJM2403M
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₩469.65
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General Purpose Surface Mount DMP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 5 x 5 x 1.6mm 5mm 5mm 1.6mm -
RS 제품 번호 178-2404
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₩961.00
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General Purpose Surface Mount DMP Dual, Single Open Collector 1 0.2µs 8 9 → 28 V 5 x 5 x 1.6mm 5mm 5mm 1.6mm -
RS 제품 번호 178-2407
제조사 부품 번호NJM2901M
제조사New Japan Radio
₩802.90
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General Purpose Surface Mount DMP Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 10 x 5 x 1.6mm 10mm 5mm 1.6mm -
RS 제품 번호 713-9408
제조사 부품 번호NJM2901V-TE1
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₩818.40
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General Purpose Surface Mount SSOP Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 5 x 4.4 x 1.15mm 5mm 4.4mm 1.15mm -
RS 제품 번호 178-2433
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General Purpose Surface Mount TVSP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 2.9 x 2.8 x 0.85mm 2.9mm 2.8mm 0.85mm -
RS 제품 번호 169-8166
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₩491.35
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General Purpose Surface Mount SSOP Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 5 x 4.4 x 1.15mm 5mm 4.4mm 1.15mm -
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₩339.45
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General Purpose Surface Mount TVSP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 2.9 x 2.8 x 0.85mm 2.9mm 2.8mm 0.85mm -