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. 159-8141
Mfr. Part No.ADCMP604BKSZ-R2
HK$37.91
Each (On a Reel of 250)
units
High Speed Surface Mount SC-70 Single LVDS 1 0.003µs 6 2.5 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 50dB
RS Stock No. 920-6355
Mfr. Part No.LM319DT
HK$2.041
Each (On a Reel of 2500)
units
High Speed Surface Mount SOIC Single TTL 2 80ns 14 5 → ±15 V 8.75 x 4 x 1.65mm 8.75mm 4mm 1.65mm -
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. 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. 779-9252
Mfr. Part No.LT1394CS8#PBF
HK$39.865
Each (In a Pack of 2)
units
High Speed Surface Mount SOIC Dual, Single CMOS, TTL 1 - 8 5 V 5.004 x 3.89 x 1.498mm 5mm 3.89mm 1.498mm 100dB
RS Stock No. 162-6240
Mfr. Part No.LM361M/NOPB
HK$16.703
Each (In a Tube of 55)
units
High Speed Surface Mount SOIC Dual TTL 2 0.02µs 14 - 8.738 x 3.988 x 1.499mm 8.74mm 3.99mm 1.5mm -
RS Stock No. 528-343
Mfr. Part No.LM393DR
HK$2.722
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. 812-4047
Mfr. Part No.TLV3202AIDGK
HK$11.491
Each (In a Pack of 10)
units
Low Power Surface Mount MSOP Single Push-Pull 1 2.9ns 8 2.7 → 5.5 V 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 70dB
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. 759-0241
Mfr. Part No.ADCMP604BKSZ-R2
HK$46.09
Each
units
High Speed Surface Mount SC-70 Single LVDS 1 0.003µs 6 2.5 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 50dB
RS Stock No. 153-3393
Mfr. Part No.LT1016CN8#PBF
HK$38.162
Each (In a Tube of 50)
units
General Purpose Through Hole PDIP Dual, Single Complementary 1 - 8 5 V 10.16 x 6.48 x 3.3mm 10.16mm 6.48mm 3.3mm 96dB
RS Stock No. 545-4799
Mfr. Part No.LT1016CN8#PBF
HK$57.14
Each
units
General Purpose Through Hole PDIP Dual, Single Complementary 1 - 8 5 V 10.16 x 6.48 x 3.3mm 10.16mm 6.48mm 3.3mm 96dB
RS Stock No. 145-5224
Mfr. Part No.LM311DR2G
HK$1.22
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. 795-8802
Mfr. Part No.LM319DT
HK$5.04
Each (In a Pack of 10)
units
High Speed Surface Mount SOIC Single TTL 2 80ns 14 5 → ±15 V 8.75 x 4 x 1.65mm 8.75mm 4mm 1.65mm -
RS Stock No. 761-5864
Mfr. Part No.LM361M/NOPB
HK$20.598
Each (In a Pack of 5)
units
High Speed Surface Mount SOIC Dual TTL 2 0.02µs 14 - 8.738 x 3.988 x 1.499mm 8.74mm 3.99mm 1.5mm -
RS Stock No. 177-7297
Mfr. Part No.LT1394CS8#PBF
HK$44.789
Each (In a Tube of 100)
units
High Speed Surface Mount SOIC Dual, Single CMOS, TTL 1 - 8 5 V 5.004 x 3.89 x 1.498mm 5mm 3.89mm 1.498mm 100dB
RS Stock No. 356-9451
Mfr. Part No.TL3116ID
HK$22.74
Each
units
General Purpose Surface Mount SOIC Dual, Single Complementary 1 - 8 5 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 100dB
RS Stock No. 660-6711
Mfr. Part No.LM2903QDRQ1
HK$3.106
Each (In a Pack of 10)
units
Differential 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. 528-353
Mfr. Part No.LM2903DR
HK$1.264
Each (In a Pack of 25)
units
Differential 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. 661-2656
Mfr. Part No.TL3016IDR
HK$19.23
Each (In a Pack of 5)
units
General Purpose Surface Mount SOIC Dual, Single Complementary 1 - 8 5 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 97dB