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 178-2404
製造零件編號NJM311M
HK$2.822
毎管:100 個
單位
General Purpose Surface Mount DMP Dual, Single Open Collector 1 0.2µs 8 9 → 28 V 5 x 5 x 1.6mm 5mm 5mm 1.6mm -
RS庫存編號 178-2301
製造零件編號NJM311D
HK$3.146
毎管:50 個
單位
General Purpose Through Hole PDIP Dual, Single Open Collector 1 0.2µs 8 9 → 28 V 8.8 x 6.4 x 3.4mm 8.8mm 6.4mm 3.4mm -
RS庫存編號 178-2405
製造零件編號NJM2903M
HK$2.482
毎管:100 個
單位
General Purpose Surface Mount DMP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 5 x 5 x 1.6mm 5mm 5mm 1.6mm -
RS庫存編號 178-2306
製造零件編號NJM2403D
HK$2.668
毎管:50 個
單位
General Purpose Through Hole PDIP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 8.8 x 6.4 x 3.4mm 8.8mm 6.4mm 3.4mm -
RS庫存編號 169-8167
製造零件編號NJM2903V-TE1
HK$1.798
個 (在毎卷:2000)
單位
General Purpose Surface Mount SSOP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 3.5 x 4.4 x 1.15mm 3.5mm 4.4mm 1.15mm -
RS庫存編號 713-9414
製造零件編號NJM2903V-TE1
HK$4.894
/個 (每包:5個)
單位
General Purpose Surface Mount SSOP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 3.5 x 4.4 x 1.15mm 3.5mm 4.4mm 1.15mm -
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 178-2409
製造零件編號NJU7102AM
HK$13.416
毎管:100 個
單位
Low Power Surface Mount DMP Single Push-Pull 2 - 8 5 → 9 V 5 x 5 x 1.6mm 5mm 5mm 1.6mm 82dB
RS庫存編號 178-2322
製造零件編號NJM12903D
HK$1.906
毎管:50 個
單位
General Purpose Through Hole PDIP Single Open Collector 2 0.5µs 8 3 → 12 V 8.8 x 6.4 x 3.4mm 8.8mm 6.4mm 3.4mm -
RS庫存編號 178-2321
製造零件編號NJM2903D
HK$2.766
毎管:50 個
單位
General Purpose Through Hole PDIP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 8.8 x 6.4 x 3.4mm 8.8mm 6.4mm 3.4mm -
RS庫存編號 178-2433
製造零件編號NJU7109F3-TE1
HK$3.812
個 (在毎卷:3000)
單位
General Purpose Surface Mount SC-88A Single Push-Pull 1 - 5 3 V, 5 V 2 x 1.25 x 0.9mm 2mm 1.25mm 0.9mm -
RS庫存編號 740-5272
製造零件編號NJM2407R-TE1
HK$3.792
/個 (每包:5個)
單位
General Purpose Surface Mount VSP Dual, Single Open Collector/Emitter 2 0.8µs 8 3 → 18 V 2.9 x 2.8 x 1.1mm 2.9mm 2.8mm 1.1mm -
RS庫存編號 740-5562
製造零件編號NJM2903MZ-TE1
HK$8.402
/個 (每包:5個)
單位
General Purpose Surface Mount DMP Single Open Collector 2 1.5µs 8 2 → 36 V 5 x 5 x 1.6mm 5mm 5mm 1.6mm -
RS庫存編號 657-0993
製造零件編號NJM2403D
HK$9.13
/個 (每包:5個)
單位
General Purpose Through Hole PDIP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 8.8 x 6.4 x 3.4mm 8.8mm 6.4mm 3.4mm -
RS庫存編號 713-9405
製造零件編號NJM2903RB1-TE1
HK$5.188
/個 (每包:5個)
單位
General Purpose Surface Mount TVSP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 2.9 x 2.8 x 0.85mm 2.9mm 2.8mm 0.85mm -
RS庫存編號 178-2406
製造零件編號NJM2903E
HK$2.482
毎管:100 個
單位
General Purpose Surface Mount EMP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 5 x 3.9 x 1.5mm 5mm 3.9mm 1.5mm -
RS庫存編號 178-2434
製造零件編號NJU7108F3-TE1
HK$3.812
個 (在毎卷:3000)
單位
General Purpose Surface Mount SC-88A Single Push-Pull 1 - 5 3 V, 5 V 2 x 1.25 x 0.9mm 2mm 1.25mm 0.9mm -
RS庫存編號 713-9408
製造零件編號NJM2901V-TE1
HK$5.00
/個 (每包:5個)
單位
General Purpose Surface Mount SSOP Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 5 x 4.4 x 1.15mm 5mm 4.4mm 1.15mm -
RS庫存編號 178-2403
製造零件編號NJM2403M
HK$2.416
毎管:100 個
單位
General Purpose Surface Mount DMP Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 5 x 5 x 1.6mm 5mm 5mm 1.6mm -
RS庫存編號 178-2408
製造零件編號NJM12903M
HK$1.732
毎管:100 個
單位
General Purpose Surface Mount DMP Single Open Collector 2 0.5µs 8 3 → 12 V 5 x 5 x 1.6mm 5mm 5mm 1.6mm -