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 799-3319
製造零件編號MAX995EUD+
BrandMaxim
HK$35.31
/個 (每包:2個)
單位
Low Power Surface Mount TSSOP Single Push-Pull 4 - 14 2.5 → 5.5 V 5.1 x 4.5 x 0.95mm 5.1mm 4.5mm 0.95mm 80dB
RS庫存編號 165-9100
製造零件編號MAX931ESA+
BrandMaxim
HK$37.523
毎管:100 個
單位
Low Power Surface Mount SOIC Dual, Single - 1 12µs 8 3 → 9 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm 80dB
RS庫存編號 661-2643
製造零件編號LP211DR
HK$10.932
/個 (每包:5個)
單位
Low Power Surface Mount SOIC Dual, Single Open Collector/Emitter 1 1.2µs 8 5 → 28 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm -
RS庫存編號 162-8891
製造零件編號LMV393DMR2G
HK$1.573
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 732-7181
製造零件編號MAX913CSA+
BrandMaxim
HK$67.55
單位
Low Power Surface Mount SOIC Dual, Single Complementary 1 - 8 5 → 10 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm 110dB
RS庫存編號 145-0963
製造零件編號ADCMP393ARZ
HK$7.874
毎管:56 個
單位
Low Power Surface Mount SOIC Single Open Drain 4 0.15 (Fall Time) μs, 1.1 (Rise Time) μs 14 2.3 → 5.5 V 8.75 x 4 x 1.5mm 8.75mm 4mm 1.5mm 74dB
RS庫存編號 172-3373
製造零件編號TL331VSN4T3G
HK$4.939
/個 (每包:25個)
單位
Low Power Surface Mount TSOP Dual, Single CMOS, DTL, ECL, TTL 1 - 5 2 → 36 V 3.15 x 1.65 x 1mm 3.15mm 1.65mm 1mm -
RS庫存編號 162-5400
製造零件編號LMV393IDGKR
HK$2.578
個 (在毎卷:2500)
單位
General Purpose Surface Mount MSOP Single Open Collector 2 - 8 3 V, 5 V 3 x 3 x 0.97mm 3mm 3mm 0.97mm -
RS庫存編號 536-0420
製造零件編號LMV762MA/NOPB
HK$18.506
/個 (每包:5個)
單位
Low Voltage Surface Mount SOIC Single Push-Pull 2 - 8 3 V 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm 100dB
RS庫存編號 165-1899
製造零件編號MCP6541RT-I/OT
BrandMicrochip
HK$2.398
個 (在毎卷:3000)
單位
Low Power Surface Mount SOT-23 Single Push-Pull 1 0.85µs 5 1.6 → 5.5 V 3.1 x 1.8 x 1.3mm 3.1mm 1.8mm 1.3mm 70dB
RS庫存編號 649-481
製造零件編號TLC3702CP
HK$10.28
單位
Low Power Through Hole PDIP Single Push-Pull 2 - 8 5 V 9.81 x 6.35 x 4.57mm 9.81mm 6.35mm 4.57mm 84dB
RS庫存編號 160-2624
製造零件編號ADCMP343YRJZ-REEL7
HK$13.249
個 (在毎卷:3000)
單位
General Purpose Surface Mount SOT-23 Single Open Drain 2 0.07 μs, 0.5 μs 8 1.7 → 5.5 V 3 x 1.7 x 1.3mm 3mm 1.7mm 1.3mm -
RS庫存編號 802-4290
製造零件編號NCS2200SN1T1G
HK$6.121
/個 (每包:20個)
單位
Low Voltage Surface Mount SOT-23 Single Rail to Rail 1 - 5 0.85 → 6 V 3 x 1.5 x 1mm 3mm 1.5mm 1mm 65dB
RS庫存編號 100-0673
製造零件編號ISL28915FH6Z-T7
BrandIntersil
HK$7.544
/個 (每包:10個)
單位
Push-Pull Output Surface Mount SOT-23 Single Push-Pull, Rail to Rail 1 - 6 Maximum of 5.75 V 2.9 x 1.6 x 1.14mm 2.9mm 1.6mm 1.14mm 98dB
RS庫存編號 661-2892
製造零件編號TLC372IP
HK$10.808
/個 (每包:5個)
單位
General Purpose Through Hole PDIP Dual, Single Open Drain 2 0.65µs 8 5 → 15 V 9.81 x 6.35 x 4.57mm 9.81mm 6.35mm 4.57mm -
RS庫存編號 165-7437
製造零件編號LM2901PT
HK$0.811
個 (在毎卷:2500)
單位
General Purpose Surface Mount TSSOP 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 145-0122
製造零件編號TLC339ID
HK$7.517
毎管:50 個
單位
Low Power Surface Mount SOIC Single Open Drain 4 2.5µs 14 5 V 8.65 x 3.91 x 1.58mm 8.65mm 3.91mm 1.58mm 84dB
RS庫存編號 151-3100
製造零件編號LTC6752ISC6-1#TRMPBF
HK$22.57
個 (在毎卷:500)
單位
High Speed Surface Mount SC-70 Single CMOS 1 - 6 Maximum of 3.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 70dB
RS庫存編號 817-3639
製造零件編號MCP6549-E/SL
BrandMicrochip
HK$7.844
毎管:57 個
單位
Low Power Surface Mount SOIC Single Open Drain 4 - 14 1.6 → 5.5 V 8.65 x 3.9 x 1.5mm 8.65mm 3.9mm 1.5mm 70dB
RS庫存編號 144-9911
製造零件編號LP2901D
HK$3.63
毎管:50 個
單位
General Purpose Surface Mount SOIC Single Open Collector 4 8µs 14 5 → 28 V 8.65 x 3.91 x 1.58mm 8.65mm 3.91mm 1.58mm -