Comparators

What is a Comparator?

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 analog to digital (ADC). Two supply voltage 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, Micro power, 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. 866-0219
Mfr. Part No.LM311N/NOPB
€0.651
Each (In a Tube of 40)
units
General Purpose Through Hole PDIP Dual, Single DTL, MOS, RTL, TTL 1 200ns 8 5 V 10.16 x 6.6 x 4.57mm 10.16mm 6.6mm 4.57mm -
RS Stock No. 124-4526
Mfr. Part No.LM311N/NOPB
€0.64
Each (In a Pack of 10)
units
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 -
RS Stock No. 178-4707
Mfr. Part No.LM339NG
€0.496
Each (In a Tube of 25)
units
General Purpose Through Hole PDIP Dual, Single Open Collector 4 1.3µs 14 5 → 28 V 19.56 x 6.6 x 3.68mm 19.56mm 6.6mm 3.68mm -
RS Stock No. 121-8421
Mfr. Part No.LM339N
€0.317
Each (In a Tube of 25)
units
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 -
RS Stock No. 121-8704
Mfr. Part No.LM339N/NOPB
€0.757
Each (In a Tube of 25)
units
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 -
RS Stock No. 533-8237
Mfr. Part No.LM339N/NOPB
€0.90
Each
units
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 -
RS Stock No. 527-198
Mfr. Part No.LM339N
€0.38
Each (In a Pack of 25)
units
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 -
RS Stock No. 522-9408
Mfr. Part No.AD790JNZ
€11.00
Each
units
General Purpose Through Hole PDIP Dual, Single TTL 1 - 8 5 V 9.27 x 7.24 x 3.43mm 9.27mm 7.24mm 3.43mm 95dB
RS Stock No. 100-0752
Mfr. Part No.LM393D
€0.276
Each (In a Tube of 75)
units
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 -
RS Stock No. 858-433
Mfr. Part No.LM393D
€0.38
Each
units
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 -
RS Stock No. 528-343
Mfr. Part No.LM393DR
€0.227
Each (In a Pack of 25)
units
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 -
RS Stock No. 523-9809
Mfr. Part No.AD790JNZ
€9.245
Each (In a Tube of 48)
units
General Purpose Through Hole PDIP Dual, Single - 1 - 8 5 V 9.27 x 7.24 x 3.43mm 9.27mm 7.24mm 3.43mm 95dB
RS Stock No. 812-0449
Mfr. Part No.TPS3700DDCT
€1.612
Each (In a Pack of 10)
units
Window Surface Mount TSOT-23 Single Open Drain 2 2.2µs 6 1.8 → 18 V 3.05 x 1.75 x 1mm 3.05mm 1.75mm 1mm -
RS Stock No. 876-7243
Mfr. Part No.MCP6546-I/P
BrandMicrochip
€0.341
Each (In a Tube of 60)
units
Low Power Through Hole PDIP Single Open Drain 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. 533-5749
Mfr. Part No.LM319N/NOPB
€1.90
Each
units
High Speed Through Hole MDIP Dual, Single Open Collector 2 0.08µs 14 9 → 28 V 19.05 x 6.35 x 3.3mm 19.05mm 6.35mm 3.3mm -
RS Stock No. 121-9350
Mfr. Part No.TPS3700DDCT
€1.133
Each (On a Reel of 250)
units
- Surface Mount TSOT-23 - - - - 6 - 3.05 x 1.75 x 1mm 3.05mm 1.75mm 1mm -
RS Stock No. 402-885
Mfr. Part No.MCP6546-I/P
BrandMicrochip
€0.404
Each (In a Pack of 10)
units
Low Power Through Hole PDIP Single Open Drain 1 - 8 3 V, 5 V 9.27 x 6.35 x 3.3mm 9.27mm 6.35mm 3.3mm 70dB
RS Stock No. 920-3475
Mfr. Part No.LM311D
€0.402
Each (In a Tube of 75)
units
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 Stock No. 545-8173
Mfr. Part No.TLV3501AID
€2.858
Each (In a Pack of 5)
units
High Speed Surface Mount SOIC Single Push-Pull 1 - 8 3 V, 5 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 70dB
RS Stock No. 165-7717
Mfr. Part No.LM339DT
€0.08
Each (On a Reel of 2500)
units
General Purpose Surface Mount SOIC Dual, Single CMOS, DL, ECL, MOS, TTL 4 1.3µs 14 2 → 36 V 8.75 x 4 x 1.65mm 8.75mm 4mm 1.65mm -
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The Texas Instruments LM193, LM293, LM393 and LM2903 are dual differential input voltage comparators designed to operate from a single power supply over a wide range of voltages The common mode input voltage range includes ground and the devices have ...
The Texas Instruments LM193, LM293, LM393 and LM2903 ...
Description:
The Texas Instruments LM193, LM293, LM393 and LM2903 are dual differential input voltage comparators designed to operate from a single power supply over a wide range of voltages The common mode input voltage range includes ground and the devices have ...
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