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庫存編號 145-5224
製造零件編號LM311DR2G
HK$1.121
個 (在毎卷:2500)
單位
General Purpose Surface Mount SOIC Dual, Single CMOS 1 200ns 8 36 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS庫存編號 805-1365
製造零件編號LM311DR2G
HK$3.05
Each (On a Tape of 25)
單位
General Purpose Surface Mount SOIC Dual, Single CMOS 1 200ns 8 36 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS庫存編號 178-4707
製造零件編號LM339NG
HK$4.93
毎管:25 個
單位
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庫存編號 787-8241
製造零件編號LM2903DMR2G
HK$2.518
/個 (每包:20個)
單位
General Purpose Surface Mount MSOP Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.5µs 8 2 → 36 V dc 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm -
RS庫存編號 787-8620
製造零件編號LM2903VDR2G
HK$2.86
/個 (每包:20個)
單位
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 -
RS庫存編號 787-8601
製造零件編號LM2901VDR2G
HK$3.45
Each (On a Tape of 20)
單位
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庫存編號 166-1860
製造零件編號LM2903N
HK$2.521
毎管:50 個
單位
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庫存編號 163-2396
製造零件編號LM239DR2G
HK$0.881
個 (在毎卷:2500)
單位
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庫存編號 806-2823
製造零件編號LM393AM
HK$4.123
毎管:90 個
單位
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庫存編號 121-6405
製造零件編號NCS2200AMUT1G
HK$1.125
個 (在毎卷:3000)
單位
Low Power Surface Mount UDFN Single Complementary 1 35µs 6 0.85 → 6 V 2 x 2.2 x 0.95mm 2mm 2.2mm 0.95mm 65dB
RS庫存編號 162-8891
製造零件編號LMV393DMR2G
HK$1.16
個 (在毎卷:4000)
單位
General Purpose Surface Mount MSOP Dual, Single Open Drain 2 800ns 8 2.7 → 5 V 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm -
RS庫存編號 162-9568
製造零件編號NCS2202SQ2T2G
HK$2.235
個 (在毎卷:3000)
單位
Low Power Surface Mount SC-70 Single Open Drain 1 35µs 5 0.85 → 6 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 65dB
RS庫存編號 185-9024
製造零件編號NCS2250SN2T1G
HK$4.615
/個 (每包:13個)
單位
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庫存編號 162-9566
製造零件編號NCS2200SN2T1G
HK$2.66
個 (在毎卷:3000)
單位
Low Power Surface Mount SOT-23 Single Complementary 1 35µs 5 0.85 → 6 V 3 x 1.5 x 1mm 3mm 1.5mm 1mm 65dB
RS庫存編號 162-9349
製造零件編號LM293DMR2G
HK$0.988
個 (在毎卷:4000)
單位
General Purpose Surface Mount MSOP Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.5µs 8 2 → 36 V dc 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm -
RS庫存編號 145-3569
製造零件編號LM2901VDTBR2G
HK$1.41
個 (在毎卷:2500)
單位
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庫存編號 689-9718
製造零件編號LM339DR2G
HK$4.058
/個 (每包:5個)
單位
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庫存編號 162-9577
製造零件編號NCV2903DR2G
HK$0.813
個 (在毎卷:2500)
單位
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 -
RS庫存編號 169-8573
製造零件編號LM319MX
HK$1.576
個 (在毎卷:3000)
單位
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庫存編號 463-155
製造零件編號LM339DG
HK$0.776
/個 (每包:50個)
單位
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 -