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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Description Prix 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
N° de stock RS 528-343
Référence fabricantLM393DR
0,233 €
Each (In a Pack of 25)
Unité
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 -
N° de stock RS 922-3296
Référence fabricantLM139AD
1,954 €
Each (In a Tube of 50)
Unité
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 -
N° de stock RS 179-1657
Référence fabricantLM211D
0,655 €
Each (In a Tube of 75)
Unité
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 -
N° de stock RS 527-530
Référence fabricantLM211DR
0,088 €
Each (In a Pack of 25)
Unité
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 -
N° de stock RS 517-2352
Référence fabricantLM211D
0,571 €
Each (In a Pack of 20)
Unité
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 -
N° de stock RS 100-0752
Référence fabricantLM393D
0,282 €
Each (In a Tube of 75)
Unité
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 -
N° de stock RS 661-2766
Référence fabricantLM139AD
2,72 €
Each (In a Pack of 5)
Unité
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 -
N° de stock RS 709-5339
Référence fabricantCMP04FSZ
13,45 €
Each
Unité
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
N° de stock RS 527-198
Référence fabricantLM339N
0,296 €
Each (In a Pack of 25)
Unité
General Purpose Through Hole PDIP Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm 4.57mm -
N° de stock RS 533-8237
Référence fabricantLM339N/NOPB
1,14 €
Each
Unité
General Purpose Through Hole MDIP Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 19.05 x 6.35 x 3.3mm 19.05mm 6.35mm 3.3mm -
N° de stock RS 819-7124
Référence fabricantADCMP354YKSZ-REEL7
0,396 €
Each (In a Pack of 10)
Unité
General Purpose Surface Mount SC-70 Single Open Drain 1 30ns 4 2.25 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm -
N° de stock RS 121-8704
Référence fabricantLM339N/NOPB
0,958 €
Each (In a Tube of 25)
Unité
General Purpose Through Hole MDIP Dual, Single Open Collector 4 1.3µs 14 3 to 28 V 19.05 x 6.35 x 3.3mm 19.05mm 6.35mm 3.3mm -
N° de stock RS 900-9879
Référence fabricantTLV1701AIDBVT
1,154 €
Each (In a Pack of 5)
Unité
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 -
N° de stock RS 858-433
Référence fabricantLM393D
0,36 €
Each
Unité
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 -
N° de stock RS 517-1882
Référence fabricantLM339AD
0,291 €
Each (In a Pack of 20)
Unité
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 -
N° de stock RS 145-0192
Référence fabricantLM293P
0,291 €
Each (In a Tube of 50)
Unité
Differential 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 -
N° de stock RS 124-4526
Référence fabricantLM311N/NOPB
0,663 €
Each (In a Pack of 10)
Unité
Voltage Through Hole PDIP Single Single Ended 1 200ns 8 Maximum of 36 V 10.16 x 6.6 x 4.57mm 10.16mm 6.6mm 4.57mm -
N° de stock RS 162-9865
Référence fabricantTLV1701AIDBVT
0,668 €
Each (On a Reel of 250)
Unité
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 -
N° de stock RS 160-4488
Référence fabricantADCMP354YKSZ-REEL7
0,384 €
Each (On a Reel of 3000)
Unité
General Purpose Surface Mount SC-70 Single Open Drain 1 30ns 4 2.25 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm -
N° de stock RS 528-157
Référence fabricantLM311DR
0,218 €
Each (In a Pack of 25)
Unité
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 -