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 822-5998
製造零件編號LT6700CS6-2#TRMPBF
HK$24.184
/個 (每包:5個)
單位
Low Voltage Surface Mount TSOT-23 Single Open Collector 2 2.2µs 6 1.4 → 18 V 2.9 x 1.5 x 0.9mm 2.9mm 1.5mm 0.9mm -
RS庫存編號 709-2393
製造零件編號LP311P
HK$10.18
/個 (每包:10個)
單位
General Purpose Through Hole PDIP Dual, Single Open Collector/Emitter 1 1.2µs 8 5 → 28 V 9.81 x 6.35 x 4.57mm 9.81mm 6.35mm 4.57mm -
RS庫存編號 825-3558
製造零件編號TLC339IPW
HK$14.20
/個 (每包:5個)
單位
Low Power Surface Mount TSSOP Single Open Drain 1 2.5µs 14 3 → 16 V 5.1 x 4.5 x 1.05mm 5.1mm 4.5mm 1.05mm 84dB
RS庫存編號 828-7551
製造零件編號AS393MTR-G1
HK$2.75
/個 (每包:50個)
單位
Low Power Surface Mount SOIC Dual, Single Open Collector 2 1.3µs 8 2 → 36 V 5.1 x 4 x 1.45mm 5.1mm 4mm 1.45mm -
RS庫存編號 191-4703
製造零件編號MAX9202ESD+
HK$40.95
/個 (每包:5個)
單位
High Speed, Low Power Surface Mount SOIC Dual, Single TTL 2 7ns 14 +5 → +10 V 8.75 x 4 x 1.5mm 8.75mm 4mm 1.5mm 50dB
RS庫存編號 145-9204
製造零件編號LM339D
HK$0.851
毎管:50 個
單位
General Purpose Surface Mount SOIC Dual, Single CMOS, DL, ECL, MOS, TTL 4 1.3µs 14 2 → 36 V 8.75 x 4 x 1.65mm 8.75mm 4mm 1.65mm -
RS庫存編號 661-2634
製造零件編號LMV393IDR
HK$5.49
/個 (每包:10個)
單位
General Purpose Surface Mount SOIC Single Open Collector 2 - 8 3 V, 5 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm -
RS庫存編號 169-8412
製造零件編號MAX9142ESA+
HK$16.655
毎管:100 個
單位
Low Power Surface Mount SOIC Single Push-Pull 2 - 8 2.7 → 5.5 V 3 x 1.75 x 1.3mm 3mm 1.75mm 1.3mm 80µV/V
RS庫存編號 191-4002
製造零件編號MAX9107ESA+
HK$17.113
毎管:100 個
單位
High Speed, Low Power Surface Mount SOIC Single TTL 2 - 8 4.5 → 5.5 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm 50µV/V
RS庫存編號 689-9718
製造零件編號LM339DR2G
HK$3.94
/個 (每包:5個)
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 185-8090
製造零件編號NCS2252SN2T1G
HK$1.924
個 (在毎卷:3000)
單位
High Speed Surface Mount TSOP Single Rail to Rail 1 - 5 1.8 → 5.5 V 3.15 x 1.65 x 1mm 3.15mm 1.65mm 1mm 81dB
RS庫存編號 190-4352
製造零件編號MAX9020EKA+T
HK$6.956
個 (在毎卷:2500)
單位
Nano Power Surface Mount SOT-23 Dual, Single Open Drain 2 - 8 1.8 → 5.5 V 3 x 1.75 x 1.3mm 3mm 1.75mm 1.3mm -
RS庫存編號 189-1922
製造零件編號TS881ICT
HK$7.29
/個 (每包:10個)
單位
- Surface Mount SC-70 Single Push-Pull 1 - 5 1.1 → 5.5 V 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm 78dB
RS庫存編號 189-1949
製造零件編號LM2902YPT
HK$3.409
/個 (每包:25個)
單位
Low Power Surface Mount TSSOP Dual, Single - 4 - 14 3 → 30 V 5.1 x 4.5 x 1.05mm 5.1mm 4.5mm 1.05mm -
RS庫存編號 160-2883
製造零件編號ADCMP581BCPZ-WP
HK$134.60
Each (In a Tray of 50)
單位
General Purpose Surface Mount LFCSP Dual ECL 1 0.037ns 16 - 3 x 3 x 0.8mm 3mm 3mm 0.8mm 60dB
RS庫存編號 622-9263
製造零件編號MAX985EUK+
HK$30.03
單位
Low Voltage Surface Mount SOT-23 Dual, Single Push-Pull 1 - 5 3 V, 5 V 2.9 x 1.63 x 1.1mm 2.9mm 1.63mm 1.1mm 80dB
RS庫存編號 163-2404
製造零件編號LM2903DG
HK$2.63
毎管:98 個
單位
General Purpose Surface Mount SOIC Dual, Single Open Collector 2 1.5µs 8 3 → 28 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS庫存編號 661-2892
製造零件編號TLC372IP
HK$10.95
/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 823-4478
製造零件編號MCP6541RT-I/OT
BrandMicrochip
HK$3.08
/個 (每包:20個)
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 145-6595
製造零件編號LM319AM/NOPB
HK$11.089
毎管:55 個
單位
High Speed Surface Mount SOIC Dual DTL, RTL, TTL 2 80µs 14 - 8.738 x 3.988 x 1.499mm 8.74mm 3.99mm 1.5mm -