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 121-9350
製造零件編號TPS3700DDCT
HK$11.32
個 (在毎卷:250)
單位
- Surface Mount TSOT-23 - - - - 6 - 3.05 x 1.75 x 1mm 3.05mm 1.75mm 1mm -
RS庫存編號 145-7305
製造零件編號LM2901D
HK$1.524
毎管:50 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 145-0121
製造零件編號LP339N
HK$3.254
毎管:25 個
單位
General Purpose Through Hole PDIP Dual, Single Open Collector 4 8µs 14 5 → 28 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm 4.57mm -
RS庫存編號 661-2656
製造零件編號TL3016IDR
HK$19.23
/個 (每包:5個)
單位
General Purpose Surface Mount SOIC Dual, Single Complementary 1 - 8 5 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 97dB
RS庫存編號 195-082
製造零件編號AD790JRZ
HK$70.36
單位
General Purpose Surface Mount SOIC Dual, Single TTL 1 - 8 5 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm 95dB
RS庫存編號 121-8305
製造零件編號LM311P
HK$4.104
毎管:50 個
單位
General Purpose Through Hole PDIP Dual, Single Open Collector/Emitter 1 0.165µs 8 5 → 28 V 9.81 x 6.35 x 4.57mm 9.81mm 6.35mm 4.57mm -
RS庫存編號 168-4869
製造零件編號LM2901DR
HK$0.753
個 (在毎卷:2500)
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 177-7305
製造零件編號LT1720CS8#PBF
HK$43.945
毎管:100 個
單位
General Purpose Surface Mount SOIC Single CMOS, Rail to Rail, TTL 2 - 8 2.7 → 6 V 5.004 x 3.89 x 1.498mm 5mm 3.89mm 1.498mm 70dB
RS庫存編號 661-2678
製造零件編號TLC3702IDR
HK$8.128
/個 (每包:5個)
單位
Low Power Surface Mount SOIC Single Push-Pull 2 - 8 5 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 84dB
RS庫存編號 162-6568
製造零件編號LM393ADGKR
HK$0.756
個 (在毎卷:2500)
單位
General Purpose Surface Mount VSSOP Dual, Single Open Collector 2 1.3µs 8 2 → 36 V 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm -
RS庫存編號 162-5637
製造零件編號TLV3701CDBVT
HK$7.852
個 (在毎卷:250)
單位
Low Power Surface Mount SOT-23 Dual, Single Push-Pull 1 240µs 5 3 → 15 V 2.9 x 1.6 x 1.15mm 2.9mm 1.6mm 1.15mm 88dB
RS庫存編號 178-2432
製造零件編號NJM2406F-TE1
HK$1.588
個 (在毎卷:3000)
單位
General Purpose Surface Mount SOT-23 Single Open Collector 1 1.5µs 5 3 V, 5 V 2.9 x 1.6 x 1.1mm 2.9mm 1.6mm 1.1mm -
RS庫存編號 912-8021
製造零件編號AD96687BRZ
HK$44.643
毎管:48 個
單位
General Purpose Surface Mount SOIC Dual Complementary 2 - 16 - 10 x 4 x 1.5mm 10mm 4mm 1.5mm 90dB
RS庫存編號 919-9890
製造零件編號LT6700CS6-1#TRMPBF
HK$17.277
個 (在毎卷:500)
單位
General Purpose Surface Mount TSOT-23 Single Open Collector 2 24µs 6 1.4 → 18 V 2.9 x 1.75 x 0.9mm 2.9mm 1.75mm 0.9mm -
RS庫存編號 798-5181
製造零件編號MAX922CSA+
BrandMaxim
HK$27.333
毎管:100 個
單位
Low Power Surface Mount SOIC Dual, Single CMOS, TTL 1 12µs 8 2.5 → 11 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm 1mV/V
RS庫存編號 812-2369
製造零件編號LMV7231SQE/NOPB
HK$27.49
單位
Precision Surface Mount WQFN Single Open Drain 6 0.5µs 24 2.2 → 5.5 V 4 x 4 x 0.8mm 4mm 4mm 0.8mm -
RS庫存編號 171-5756
製造零件編號LM393F-GE2
BrandROHM
HK$0.951
個 (在毎卷:2500)
單位
- Surface Mount SOP Dual, Single Open Collector 2 1µs 8 3 → 32 V 5 x 4.4 x 1.5mm 5mm 4.4mm 1.5mm -
RS庫存編號 160-2626
製造零件編號ADCMP350YKSZ-REEL7
HK$4.51
個 (在毎卷:3000)
單位
General Purpose Surface Mount SC-70 Single Open Drain 1 30 ns, 45 ns 4 2.25 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm -
全新
RS庫存編號 189-8765
製造零件編號MAX9144ESD+
BrandMaxim
HK$22.716
/個 (每包:5個)
單位
Low Power Surface Mount SOIC Single Push-Pull 4 - 14 2.7 → 5.5 V 8.75 x 4 x 1.5mm 8.75mm 4mm 1.5mm 80µV/V
RS庫存編號 162-9353
製造零件編號LM339DTBR2G
HK$1.18
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 -