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 165-3326
製造零件編號MCP6541UT-I/LT
BrandMicrochip
HK$2.398
個 (在毎卷:3000)
單位
General Purpose Surface Mount SC-70 Single Push-Pull 1 - 5 1.6 → 5.5 V 2.25 x 1.35 x 1mm 2.25mm 1.35mm 1mm 70dB
RS庫存編號 768-1362
製造零件編號MCP6541UT-I/LT
BrandMicrochip
HK$2.80
/個 (每包:10個)
單位
General Purpose Surface Mount SC-70 Single Push-Pull 1 - 5 1.6 → 5.5 V 2.25 x 1.35 x 1mm 2.25mm 1.35mm 1mm 70dB
RS庫存編號 536-1388
製造零件編號LM393M/NOPB
HK$15.38
單位
General Purpose Surface Mount SOIC Dual, Single Open Collector 2 1.3µs 8 3 → 28 V 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm -
RS庫存編號 660-4471
製造零件編號TLV3492AIDCNT
HK$17.63
單位
Low Power Surface Mount SOT-23 Single Push-Pull 2 6µs 8 3 V, 5 V 2.9 x 1.63 x 1.1mm 2.9mm 1.63mm 1.1mm 74dB
RS庫存編號 121-8871
製造零件編號LM393M/NOPB
HK$4.847
毎管:95 個
單位
General Purpose Surface Mount SOIC Dual, Single Open Collector 2 1.3µs 8 3 to 28 V 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm -
RS庫存編號 162-5308
製造零件編號TLV3492AIDCNT
HK$11.944
個 (在毎卷:250)
單位
Low Power Surface Mount SOT-23 Single Push-Pull 2 6µs 8 3 V, 5 V 2.9 x 1.63 x 1.1mm 2.9mm 1.63mm 1.1mm 74dB
RS庫存編號 760-9468
製造零件編號TS3022IDT
HK$10.87
/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 528-157
製造零件編號LM311DR
HK$2.544
/個 (每包:25個)
單位
General Purpose Surface Mount SOIC Dual, Single Open Collector/Emitter 1 0.165µs 8 5 → 28 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm -
RS庫存編號 517-2396
製造零件編號LM311D
HK$3.604
/個 (每包:20個)
單位
General Purpose Surface Mount SOIC Dual, Single Open Collector/Emitter 1 0.165µs 8 5 → 28 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm -
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 920-3475
製造零件編號LM311D
HK$1.926
毎管:75 個
單位
General Purpose Surface Mount SOIC Dual, Single Open Collector/Emitter 1 0.165µs 8 5 → 28 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm -
RS庫存編號 866-0219
製造零件編號LM311N/NOPB
HK$6.64
毎管:40 個
單位
General Purpose Through Hole PDIP Dual, Single DTL, MOS, RTL, TTL 1 200ns 8 5 V 10.16 x 6.6 x 4.57mm 10.16mm 6.6mm 4.57mm -
RS庫存編號 533-8237
製造零件編號LM339N/NOPB
HK$6.84
單位
General Purpose Through Hole MDIP Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 19.05 x 6.35 x 3.3mm 19.05mm 6.35mm 3.3mm -
RS庫存編號 121-8421
製造零件編號LM339N
HK$3.154
毎管:25 個
單位
General Purpose 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 121-8704
製造零件編號LM339N/NOPB
HK$6.09
毎管:25 個
單位
General Purpose Through Hole MDIP Dual, Single Open Collector 4 1.3µs 14 3 to 28 V 19.05 x 6.35 x 3.3mm 19.05mm 6.35mm 3.3mm -
RS庫存編號 124-4526
製造零件編號LM311N/NOPB
HK$5.899
/個 (每包:10個)
單位
Voltage Through Hole PDIP Single Single Ended 1 200ns 8 Maximum of 36 V 10.16 x 6.6 x 4.57mm 10.16mm 6.6mm 4.57mm -
RS庫存編號 527-198
製造零件編號LM339N
HK$3.406
/個 (每包:25個)
單位
General Purpose 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 796-7997
製造零件編號LM111JG
HK$228.64
/個 (每包:2個)
單位
General Purpose Through Hole CDIP Single Open Collector, Open Drain 1 115 ns, 165 ns 8 5 V 10.16 x 7.11 x 5.08mm 10.16mm 7.11mm 5.08mm -
RS庫存編號 159-8141
製造零件編號ADCMP604BKSZ-R2
HK$39.32
個 (在毎卷:250)
單位
High Speed Surface Mount SC-70 Single LVDS 1 0.003µs 6 2.5 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 50dB
RS庫存編號 779-9252
製造零件編號LT1394CS8#PBF
HK$39.865
/個 (每包:2個)
單位
High Speed Surface Mount SOIC Dual, Single CMOS, TTL 1 - 8 5 V 5.004 x 3.89 x 1.498mm 5mm 3.89mm 1.498mm 100dB