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.

...
Read more Read less

Filters

Viewing 1 - 20 of 117 products
Results per page
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. 145-5224
Mfr. Part No.LM311DR2G
HK$1.259
Each (On a Reel of 2500)
units
General Purpose Surface Mount SOIC Dual, Single CMOS 1 200ns 8 36 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS Stock No. 166-1847
Mfr. Part No.LM393M
HK$1.088
Each (In a Tube of 90)
units
Differential Surface Mount SOIC Dual, Single Open Collector 2 1.4µs 8 2 → 36 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS Stock No. 805-1365
Mfr. Part No.LM311DR2G
HK$2.635
Each (On a Tape of 25)
units
General Purpose Surface Mount SOIC Dual, Single CMOS 1 200ns 8 36 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS Stock No. 903-4318
Mfr. Part No.LM393MX
HK$2.614
Each (In a Pack of 50)
units
Differential Surface Mount SOIC Dual, Single Open Collector 2 1.4µs 8 2 → 36 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS Stock No. 761-4463
Mfr. Part No.LM393M
HK$2.189
Each (In a Pack of 10)
units
General Purpose Surface Mount SOP Dual, Single TTL 2 1.5µs 8 36 V 4.92 x 3.95 x 1.55mm 4.92mm 3.95mm 1.55mm -
RS Stock No. 145-4483
Mfr. Part No.LM393MX
HK$0.794
Each (On a Reel of 3000)
units
Differential Surface Mount SOIC Dual, Single Open Collector 2 1.4µs 8 2 → 36 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS Stock No. 178-4707
Mfr. Part No.LM339NG
HK$5.35
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. 903-3696
Mfr. Part No.LM393N
HK$4.797
Each (In a Tube of 50)
units
Differential Through Hole DIP Dual, Single Open Collector 2 1.4µs 8 2 → 36 V 10.15 x 6.35 x 3.3mm 10.15mm 6.35mm 3.3mm -
RS Stock No. 463-666
Mfr. Part No.LM339NG
HK$4.811
Each (In a Pack of 20)
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. 162-9576
Mfr. Part No.NCV2901DR2G
HK$1.652
Each (On a Reel of 2500)
units
General Purpose Surface Mount SOIC Dual, Single CMOS, TTL 4 1.3µs 14 3 → 36 V 8.75 x 4 x 1.5mm 8.75mm 4mm 1.5mm -
RS Stock No. 162-9577
Mfr. Part No.NCV2903DR2G
HK$1.68
Each (On a Reel of 2500)
units
General Purpose Surface Mount SOIC Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.5µs 8 2 → 36 V dc 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
New
RS Stock No. 185-8101
Mfr. Part No.NCV2252SN2T1G
HK$2.115
Each (On a Reel of 3000)
units
High Speed Surface Mount TSOP Single Rail to Rail 1 - 5 1.8 → 5.5 V 3.15 x 1.65 x 1mm 3.15mm 1.65mm 1mm 81dB
RS Stock No. 787-8605
Mfr. Part No.LM2901VDTBR2G
HK$2.966
Each (On a Tape of 20)
units
General Purpose Surface Mount TSSOP Dual, Single CMOS, TTL 4 1.3µs 14 3 → 36 V 5.1 x 4.5 x 1.05mm 5.1mm 4.5mm 1.05mm -
RS Stock No. 787-8822
Mfr. Part No.NCV2901DR2G
HK$3.58
Each (In a Pack of 20)
units
General Purpose Surface Mount SOIC Dual, Single CMOS, TTL 4 1.3µs 14 3 → 36 V 8.75 x 4 x 1.5mm 8.75mm 4mm 1.5mm -
RS Stock No. 802-1686
Mfr. Part No.NCS2200SQ2T2G
HK$5.599
Each (In a Pack of 20)
units
Low Voltage Surface Mount SC-70 Single Complementary 1 16ns 5 6 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 65dB
RS Stock No. 805-7231
Mfr. Part No.NCV2200SN2T1G
HK$4.361
Each (In a Pack of 10)
units
Low Voltage Surface Mount SOT-23 Single Complementary 1 16ns 5 0.85 → 6 V 3 x 1.5 x 1mm 3mm 1.5mm 1mm 65dB
RS Stock No. 122-0108
Mfr. Part No.LM2903DR2G
HK$0.691
Each (On a Reel of 2500)
units
General Purpose Surface Mount SOIC Dual, Single Open Collector 2 1.5µs 8 3 to 28 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS Stock No. 806-2823
Mfr. Part No.LM393AM
HK$3.955
Each (In a Tube of 90)
units
General Purpose Surface Mount SOIC Dual, Single Differential 2 1.4µs 8 ±1 → ±18 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS Stock No. 145-3881
Mfr. Part No.LM2901DR2G
HK$0.718
Each (On a Reel of 2500)
units
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 -
RS Stock No. 689-9711
Mfr. Part No.LM2903DR2G
HK$2.29
Each (In a Pack of 5)
units
General Purpose Surface Mount SOIC Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -