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. 912-7961
Mfr. Part No.AD8561ARUZ
PHP180.60
Each (In a Tube of 96)
units
General Purpose Surface Mount TSSOP Dual, Single Complementary 1 - 8 5 V, 9 V 3 x 4.4 x 1.05mm 3mm 4.4mm 1.05mm 85dB
RS Stock No. 822-6581
Mfr. Part No.LT1715HMS#PBF
PHP466.87
Each
units
Low Power Surface Mount MSOP Single CMOS, Rail to Rail, TTL 2 2ns 10 2.7 → 12 V 3 x 3 x 0.86mm 3mm 3mm 0.86mm 70dB
RS Stock No. 920-0085
Mfr. Part No.LT1715HMS#PBF
PHP318.444
Each (In a Tube of 50)
units
Low Power Surface Mount MSOP Single CMOS, Rail to Rail, TTL 2 2ns 10 2.7 → 12 V 3 x 3 x 0.86mm 3mm 3mm 0.86mm 70dB
RS Stock No. 709-7193
Mfr. Part No.AD8561ARUZ
PHP159.94
Each
units
General Purpose Surface Mount TSSOP Dual, Single Complementary 1 - 8 5 V, 9 V 3 x 4.4 x 1.05mm 3mm 4.4mm 1.05mm 85dB
RS Stock No. 522-9408
Mfr. Part No.AD790JNZ
PHP558.83
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. 523-9809
Mfr. Part No.AD790JNZ
PHP486.875
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. 761-8361
Mfr. Part No.LT1671CS8#PBF
PHP161.05
Each
units
High Speed Surface Mount SOIC Dual, Single TTL 1 - 8 5 V 5.004 x 3.988 x 1.498mm 5mm 3.988mm 1.498mm 100dB
RS Stock No. 912-7514
Mfr. Part No.AD8561ANZ
PHP228.38
Each (In a Tube of 50)
units
General Purpose Through Hole PDIP Dual, Single Complementary 1 - 8 5 V, 9 V 9.27 x 7.24 x 3.43mm 9.27mm 7.24mm 3.43mm 85dB
RS Stock No. 145-6795
Mfr. Part No.LT1671CS8#PBF
PHP139.293
Each (In a Tube of 100)
units
High Speed Surface Mount SOIC Dual, Single TTL 1 - 8 5 V 5.004 x 3.988 x 1.498mm 5mm 3.988mm 1.498mm 100dB
RS Stock No. 523-8711
Mfr. Part No.AD8561ANZ
PHP297.68
Each
units
General Purpose Through Hole PDIP Dual, Single Complementary 1 - 8 5 V, 9 V 9.27 x 7.24 x 3.43mm 9.27mm 7.24mm 3.43mm 85dB
RS Stock No. 111-2263
Mfr. Part No.ADCMP553BRMZ
PHP177.414
Each (In a Tube of 50)
units
General Purpose Surface Mount MSOP Single Complementary 1 - 8 3.3 V 3 x 3 x 0.85mm 3mm 3mm 0.85mm 76dB
RS Stock No. 153-3559
Mfr. Part No.LT1011CN8#PBF
PHP103.381
Each (In a Tube of 50)
units
General Purpose Through Hole PDIP Dual, Single Open Collector 1 0.15µs 8 30 V 10.16 x 6.477 x 3.302mm 10.16mm 6.477mm 3.302mm 115dB
RS Stock No. 779-9394
Mfr. Part No.LT1715CMS#PBF
PHP366.44
Each
units
General Purpose Surface Mount MSOP Single CMOS, Open Collector, Rail to Rail, TTL 2 - 10 2.7 → 12 V 3 x 3 x 0.9984mm 3mm 3mm 0.998mm 70dB
RS Stock No. 145-6604
Mfr. Part No.LT1715CMS#PBF
PHP274.234
Each (In a Tube of 50)
units
General Purpose Surface Mount MSOP Single CMOS, Open Collector, Rail to Rail, TTL 2 - 10 2.7 → 12 V 3 x 3 x 0.9984mm 3mm 3mm 0.998mm 70dB
RS Stock No. 920-0066
Mfr. Part No.LT1711CMS8#PBF
PHP157.899
Each (In a Tube of 50)
units
High Speed Surface Mount MSOP Dual, Single Rail to Rail 1 2ns 8 2.4 → 12 V 3 x 3 x 1.095mm 3mm 3mm 1.095mm 75dB
RS Stock No. 697-7549
Mfr. Part No.ADCMP553BRMZ
PHP226.86
Each
units
General Purpose Surface Mount MSOP Single Complementary 1 - 8 3.3 V 3 x 3 x 0.85mm 3mm 3mm 0.85mm 76dB
RS Stock No. 822-5840
Mfr. Part No.LT1711CMS8#PBF
PHP203.185
Each (In a Pack of 2)
units
High Speed Surface Mount MSOP Dual, Single Rail to Rail 1 2ns 8 2.4 → 12 V 3 x 3 x 1.095mm 3mm 3mm 1.095mm 75dB
RS Stock No. 877-9063
Mfr. Part No.ADCMP581BCPZ-WP
PHP906.48
Each
units
General Purpose Surface Mount LFCSP Dual ECL 1 0.037ns 16 - 3 x 3 x 0.8mm 3mm 3mm 0.8mm 60dB
RS Stock No. 761-7927
Mfr. Part No.LT1011CN8#PBF
PHP142.88
Each
units
General Purpose Through Hole PDIP Dual, Single Open Collector 1 0.15µs 8 30 V 10.16 x 6.477 x 3.302mm 10.16mm 6.477mm 3.302mm 115dB
RS Stock No. 160-2883
Mfr. Part No.ADCMP581BCPZ-WP
PHP802.371
Each (In a Tray of 50)
units
General Purpose Surface Mount LFCSP Dual ECL 1 0.037ns 16 - 3 x 3 x 0.8mm 3mm 3mm 0.8mm 60dB