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 168-7454
製造零件編號TS3022IDT
HK$9.285
個 (在毎卷:2500)
單位
High Speed Surface Mount SOIC Single Push-Pull 2 0.009µs 8 1.8 → 5 V 5 x 4 x 1.25mm 5mm 4mm 1.25mm 67dB
RS庫存編號 760-9468
製造零件編號TS3022IDT
HK$11.626
/個 (每包:5個)
單位
High Speed Surface Mount SOIC Single Push-Pull 2 0.009µs 8 1.8 → 5 V 5 x 4 x 1.25mm 5mm 4mm 1.25mm 67dB
RS庫存編號 920-6355
製造零件編號LM319DT
HK$2.041
個 (在毎卷:2500)
單位
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庫存編號 795-8802
製造零件編號LM319DT
HK$5.04
/個 (每包:10個)
單位
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庫存編號 145-9203
製造零件編號LM239D
HK$0.838
毎管:50 個
單位
General Purpose Surface Mount SOIC Dual, Single CMOS, DL, ECL, MOS, TTL 4 1.3µs 14 2 → 36 V 8.75 x 4 x 1.65mm 8.75mm 4mm 1.65mm -
RS庫存編號 920-6361
製造零件編號TS391ILT
HK$1.518
個 (在毎卷:3000)
單位
General Purpose Surface Mount SOT-23 Dual, Single Open Collector 1 0.3µs 5 3 → 28 V 3 x 1.75 x 1.3mm 3mm 1.75mm 1.3mm -
RS庫存編號 714-0714
製造零件編號LM239D
HK$16.83
/個 (每包:20個)
單位
General Purpose Surface Mount SOIC Dual, Single CMOS, DL, ECL, MOS, TTL 4 1.3µs 14 2 → 36 V 8.75 x 4 x 1.65mm 8.75mm 4mm 1.65mm -
RS庫存編號 426-203
製造零件編號TS391ILT
HK$3.62
/個 (每包:10個)
單位
General Purpose Surface Mount SOT-23 Dual, Single Open Collector 1 0.3µs 5 2 → 36 V 3 x 1.75 x 1.3mm 3mm 1.75mm 1.3mm -
RS庫存編號 168-6423
製造零件編號LM239DT
HK$0.802
個 (在毎卷:2500)
單位
General Purpose Surface Mount SOIC Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 8.75 x 4 x 1.65mm 8.75mm 4mm 1.65mm -
RS庫存編號 686-7519
製造零件編號LM239DT
HK$1.771
/個 (每包:25個)
單位
General Purpose Surface Mount SOIC Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 8.75 x 4 x 1.65mm 8.75mm 4mm 1.65mm -
RS庫存編號 877-2762
製造零件編號LM393ST
HK$1.988
/個 (每包:25個)
單位
Low Power Surface Mount MSOP Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.3µs 8 2 → 36 V 3.2 x 3.1 x 0.95mm 3.2mm 3.1mm 0.95mm -
RS庫存編號 145-9534
製造零件編號LM393ST
HK$0.873
個 (在毎卷:4000)
單位
Low Power Surface Mount MSOP Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.3µs 8 2 → 36 V 3.2 x 3.1 x 0.95mm 3.2mm 3.1mm 0.95mm -
全新
RS庫存編號 189-1889
製造零件編號TS864IPT
HK$3.028
個 (在毎卷:2500)
單位
Micropower Surface Mount TSSOP Single Push-Pull 4 500ns 14 2.7 → 10 V 5.1 x 4.5 x 1.05mm 5.1mm 4.5mm 1.05mm 75dB
全新
RS庫存編號 189-1890
製造零件編號TS881ICT
HK$3.549
個 (在毎卷:3000)
單位
- Surface Mount SC-70 Single Push-Pull 1 - 5 1.1 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 78dB
RS庫存編號 686-7515
製造零件編號TS393IDT
HK$4.421
/個 (每包:10個)
單位
Low Power Surface Mount SOIC Dual, Single Open Drain 2 2.5µs 8 3 → 15 V 4.9 x 3.9 x 1.25mm 4.9mm 3.9mm 1.25mm 71dB
全新
RS庫存編號 189-1962
製造零件編號LM293QT
HK$3.201
/個 (每包:25個)
單位
Low Power Surface Mount DFN Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.3µs 8 2 → 36 V 2.05 x 2.05 x 0.7mm 2.05mm 2.05mm 0.7mm -
RS庫存編號 165-5284
製造零件編號TSX3702IDT
HK$3.325
個 (在毎卷:2500)
單位
Low Power Surface Mount SOIC Dual, Single Push-Pull 2 2.4µs 8 2.7 → 16 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm 90dB
全新
RS庫存編號 189-1955
製造零件編號LM2903YPT
HK$3.597
/個 (每包:25個)
單位
Low Power Surface Mount TSSOP Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.3µs 8 2 → 36 V 4.5 x 3.1 x 1.05mm 4.5mm 3.1mm 1.05mm -
RS庫存編號 714-0745
製造零件編號LM2901DT
HK$1.867
/個 (每包:20個)
單位
General Purpose Surface Mount SOIC Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 8.75 x 4 x 1.65mm 8.75mm 4mm 1.65mm -
RS庫存編號 168-7047
製造零件編號TS332IYDT
HK$5.01
個 (在毎卷:2500)
單位
Low Voltage Surface Mount SOIC Dual, Single Open Drain 2 - 8 5.5 V 5 x 4 x 1.25mm 5mm 4mm 1.25mm 79dB