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 145-4483
製造零件編號LM393MX
HK$0.794
個 (在毎卷:3000)
單位
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庫存編號 761-4463
製造零件編號LM393M
HK$2.189
/個 (每包:10個)
單位
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庫存編號 903-4318
製造零件編號LM393MX
HK$2.614
/個 (每包:50個)
單位
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庫存編號 805-1365
製造零件編號LM311DR2G
HK$2.635
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 145-5224
製造零件編號LM311DR2G
HK$1.259
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 166-1847
製造零件編號LM393M
HK$1.088
毎管:90 個
單位
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庫存編號 178-4707
製造零件編號LM339NG
HK$5.204
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 463-666
製造零件編號LM339NG
HK$4.811
/個 (每包:20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 162-9570
製造零件編號NCS2220AMUT1G
HK$5.676
個 (在毎卷:3000)
單位
Low Power Surface Mount UDFN Single Rail to Rail 2 - 8 0.85 → 6 V 1.6 x 1.6 x 0.5mm 1.6mm 1.6mm 0.5mm 70dB
RS庫存編號 787-8689
製造零件編號LMV339DTBR2G
HK$2.079
/個 (每包:20個)
單位
General Purpose Surface Mount TSSOP Single Open Drain 4 - 14 2.7 → 5 V 5.1 x 4.5 x 1.05mm 5.1mm 4.5mm 1.05mm -
RS庫存編號 166-1610
製造零件編號LM2903MX
HK$1.357
個 (在毎卷:3000)
單位
General Purpose Surface Mount SOP Dual, Single Open Collector 2 0.35 μs, 1.4 μs 8 2 → 36 V 5.13 x 3.95 x 1.55mm 5.13mm 3.95mm 1.55mm -
RS庫存編號 787-8608
製造零件編號LM239DTBR2G
HK$1.122
Each (On a Tape of 20)
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 787-8241
製造零件編號LM2903DMR2G
HK$2.217
/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 162-9391
製造零件編號MC3302DR2G
HK$2.171
個 (在毎卷:2500)
單位
General Purpose Surface Mount SOIC Dual, Single CMOS, TTL 4 1.3µs 14 3 → 30 V 8.75 x 4 x 1.5mm 8.75mm 4mm 1.5mm -
RS庫存編號 759-9368
製造零件編號LM2901MX
HK$2.77
/個 (每包:10個)
單位
General Purpose Surface Mount SOP Dual, Single Open Collector 4 0.3 μs, 1.3 μs 14 2 → 36 V 8.76 x 4.2 x 1.65mm 8.76mm 4.2mm 1.65mm -
RS庫存編號 463-656
製造零件編號LM2903DG
HK$2.071
/個 (每包:25個)
單位
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 -
RS庫存編號 920-9859
製造零件編號NCS2202AMUTBG
HK$7.50
/個 (每包:5個)
單位
Low Voltage Surface Mount UDFN Single Open Drain 1 - 6 0.85 → 6 V 1.2 x 1 x 0.5mm 1.2mm 1mm 0.5mm 80dB
RS庫存編號 805-7231
製造零件編號NCV2200SN2T1G
HK$4.361
/個 (每包:10個)
單位
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庫存編號 689-9708
製造零件編號LM239DR2G
HK$2.88
/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 787-8829
製造零件編號NCV2903DR2G
HK$3.365
Each (On a Tape of 20)
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 -