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 177-3156
製造零件編號MCP6547T-E/MS
BrandMicrochip
HK$4.587
/個 (每包:20個)
單位
Rail to Rail Surface Mount MSOP Single Open Drain 2 4µs 8 - 3 x 3 x 0.95mm 3mm 3mm 0.95mm 70dB
RS庫存編號 759-0232
製造零件編號ADCMP600BKSZ-R2
HK$41.06
單位
High Speed Surface Mount SC-70 Single CMOS, TTL 1 0.005µs 5 2.5 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 50dB
RS庫存編號 171-5776
製造零件編號BU7252F-E2
BrandROHM
HK$2.342
個 (在毎卷:2500)
單位
High Speed CMOS Surface Mount SOP Dual, Single Push-Pull 2 0.55µs 8 1.8 → 5.5 V 5 x 4.4 x 1.5mm 5mm 4.4mm 1.5mm 80dB
RS庫存編號 162-4222
製造零件編號LMP7300MA/NOPB
HK$19.039
毎管:95 個
單位
Low Power Surface Mount SOIC Dual, Single Open Collector 1 - 8 3 → 9 V 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm 100dB
全新
RS庫存編號 189-1856
製造零件編號LM393QT
HK$1.017
個 (在毎卷:3000)
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 158-5242
製造零件編號CMP402GSZ
HK$51.868
毎管:48 個
單位
Low Voltage Surface Mount SOIC Dual, Single - 4 - 16 - 10 x 4 x 1.5mm 10mm 4mm 1.5mm 60dB
RS庫存編號 787-8816
製造零件編號NCS2202SQ2T2G
HK$2.617
Each (On a Tape of 10)
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 162-5376
製造零件編號LM2903DGKR
HK$0.993
個 (在毎卷:2500)
單位
Differential Surface Mount MSOP Dual, Single Open Collector 2 1.3µs 8 3 → 28 V 3 x 3 x 0.97mm 3mm 3mm 0.97mm -
RS庫存編號 661-2781
製造零件編號LM2901N
HK$2.679
/個 (每包:10個)
單位
Differential Through Hole PDIP Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm 4.57mm -
RS庫存編號 163-2416
製造零件編號LM339DR2G
HK$0.662
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 145-8991
製造零件編號MCP6567-E/MS
BrandMicrochip
HK$4.741
毎管:100 個
單位
General Purpose Surface Mount MSOP Single Open Drain 2 - 8 1.8 → 5.5 V 3 x 3 x 0.95mm 3mm 3mm 0.95mm 65dB
全新
RS庫存編號 191-3230
製造零件編號MAX992EUA+
BrandMaxim
HK$15.759
毎管:50 個
單位
- Surface Mount μMAX Dual, Single Open Drain 1 - 8 2.5 → 5.5 V 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 80dB
RS庫存編號 144-5908
製造零件編號MIC842HYMT-T5
BrandMicrochip
HK$4.003
個 (在毎卷:500)
單位
Micro Power Comparator Surface Mount TDFN Single Push-Pull 1 - 4 1.5 → 5.5 V 1.6 x 1.2 x 0.5mm 1.6mm 1.2mm 0.5mm -
RS庫存編號 791-8021
製造零件編號TS334IYDT
HK$7.886
/個 (每包:10個)
單位
Low Voltage Surface Mount SOIC Dual, Single Open Drain 4 - 14 5.5 V 8.75 x 4 x 1.65mm 8.75mm 4mm 1.65mm 79dB
RS庫存編號 774-7554
製造零件編號MCP6548-E/MS
BrandMicrochip
HK$3.81
個 (以毎袋:15)
單位
General Purpose Surface Mount MSOP Single Open Drain 1 - 8 1.6 → 5.5 V 3 x 3 x 0.95mm 3mm 3mm 0.95mm 70dB
RS庫存編號 162-5395
製造零件編號LMV339IPWR
HK$3.05
個 (在毎卷:2000)
單位
General Purpose Surface Mount TSSOP Single Open Collector 4 - 14 3 V, 5 V 5 x 4.4 x 1.15mm 5mm 4.4mm 1.15mm -
全新
RS庫存編號 189-1843
製造零件編號LM239APT
HK$1.479
個 (在毎卷:2500)
單位
Low Power Surface Mount TSSOP Dual, Single CMOS, DTL, ECL, MOS, TTL 4 1.3µs 14 2 → 32 V 5.1 x 4.5 x 1.05mm 5.1mm 4.5mm 1.05mm -
RS庫存編號 858-0844
製造零件編號LT6700IS6-1#TRMPBF
HK$26.972
/個 (每包:5個)
單位
Low Voltage Surface Mount TSOT-23 Single Open Collector - - 6 18.5 V 2.9 x 1.75 x 0.9mm 2.9mm 1.75mm 0.9mm -
RS庫存編號 661-2573
製造零件編號LM239ADR
HK$2.063
/個 (每包:10個)
單位
Differential Surface Mount SOIC Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 8.65 x 3.91 x 1.58mm 8.65mm 3.91mm 1.58mm -
RS庫存編號 759-1544
製造零件編號ADCMP572BCPZ-R2
HK$154.35
單位
High Speed Surface Mount LFCSP VQ Single CML 1 0.000165µs 16 3.3 → 5.2 V 3 x 3 x 0.95mm 3mm 3mm 0.95mm 65dB