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. 153-3393
Mfr. Part No.LT1016CN8#PBF
$7.689
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
$11.58
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. 810-267
Mfr. Part No.LM2903P
$0.69
Each
units
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 -
RS Stock No. 121-8466
Mfr. Part No.LM2903P
$0.48
Each (In a Tube of 50)
units
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 -
RS Stock No. 828-7533
Mfr. Part No.AS339MTR-G1
$0.382
Each (In a Pack of 50)
units
Low Power Surface Mount SOIC Dual, Single Open Collector 4 1.3µs 14 2 → 36 V 8.75 x 4 x 1.5mm 8.75mm 4mm 1.5mm -
RS Stock No. 170-8921
Mfr. Part No.AS339MTR-G1
$0.166
Each (On a Reel of 4000)
units
Low Power Surface Mount SOIC Dual, Single Open Collector 4 1.3µs 14 2 → 36 V 8.75 x 4 x 1.5mm 8.75mm 4mm 1.5mm -
RS Stock No. 761-5628
Mfr. Part No.LM319AM/NOPB
$1.51
Each (In a Pack of 5)
units
High Speed Surface Mount SOIC Dual DTL, RTL, TTL 2 80µs 14 - 8.738 x 3.988 x 1.499mm 8.74mm 3.99mm 1.5mm -
RS Stock No. 759-9386
Mfr. Part No.LM319MX
$0.624
Each (In a Pack of 10)
units
High Speed Surface Mount SOP Dual, Single Open Collector 2 0.08µs 14 5 V 8.76 x 4.2 x 1.65mm 8.76mm 4.2mm 1.65mm -
RS Stock No. 533-5749
Mfr. Part No.LM319N/NOPB
$3.30
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. 169-8573
Mfr. Part No.LM319MX
$0.273
Each (On a Reel of 3000)
units
High Speed Surface Mount SOP Dual, Single Open Collector 2 0.08µs 14 5 V 8.76 x 4.2 x 1.65mm 8.76mm 4.2mm 1.65mm -
RS Stock No. 661-2810
Mfr. Part No.LM393AD
$0.493
Each (In a Pack of 10)
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. 145-6595
Mfr. Part No.LM319AM/NOPB
$1.415
Each (In a Tube of 55)
units
High Speed Surface Mount SOIC Dual DTL, RTL, TTL 2 80µs 14 - 8.738 x 3.988 x 1.499mm 8.74mm 3.99mm 1.5mm -
RS Stock No. 166-1860
Mfr. Part No.LM2903N
$0.455
Each (In a Tube of 50)
units
General Purpose Through Hole PDIP Dual, Single Open Collector 2 0.2 μs, 1.4 μs 8 2 → 36 V 9.6 x 6.4 x 3.4mm 9.6mm 6.4mm 3.4mm -
RS Stock No. 179-1746
Mfr. Part No.LM393AD
$0.453
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. 806-2804
Mfr. Part No.LM319M
$0.685
Each (In a Tube of 54)
units
General Purpose Surface Mount SOP Single Open Collector 2 80ns 14 5 V 8.76 x 4.2 x 1.65mm 8.76mm 4.2mm 1.65mm -
RS Stock No. 121-8305
Mfr. Part No.LM311P
$0.773
Each (In a Tube of 50)
units
General Purpose Through Hole PDIP Dual, Single Open Collector/Emitter 1 0.165µs 8 5 → 28 V 9.81 x 6.35 x 4.57mm 9.81mm 6.35mm 4.57mm -
RS Stock No. 812-4038
Mfr. Part No.TLV3201AIDBVT
$2.011
Each (In a Pack of 10)
units
Low Power Surface Mount SOT-23 Single Push-Pull 1 2.9ns 5 2.7 → 5.5 V 3.05 x 1.75 x 1.3mm 3.05mm 1.75mm 1.3mm 70dB
RS Stock No. 124-4526
Mfr. Part No.LM311N/NOPB
$1.108
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. 178-9080
Mfr. Part No.LM3302N
$1.118
Each (In a Tube of 25)
units
General Purpose Through Hole PDIP Dual, Single Open Collector 4 1.3µs 14 3 → 24 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm 4.57mm -
RS Stock No. 121-6402
Mfr. Part No.LM2903NG
$0.353
Each (In a Tube of 50)
units
General Purpose Through Hole PDIP Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.5µs 8 2 → 36 V dc 10.02 x 7.11 x 5.33mm 10.02mm 7.11mm 5.33mm -
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