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 145-5224
製造零件編號LM311DR2G
HK$1.259
個 (在毎卷:2500)
單位
General Purpose Surface Mount SOIC Dual, Single CMOS 1 200ns 8 36 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS庫存編號 761-4463
製造零件編號LM393M
HK$2.189
/個 (每包:10個)
單位
General Purpose Surface Mount SOP Dual, Single TTL 2 1.5µs 8 36 V 4.92 x 3.95 x 1.55mm 4.92mm 3.95mm 1.55mm -
RS庫存編號 903-4318
製造零件編號LM393MX
HK$1.657
/個 (每包:50個)
單位
Differential Surface Mount SOIC Dual, Single Open Collector 2 1.4µs 8 2 → 36 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS庫存編號 145-4483
製造零件編號LM393MX
HK$0.794
個 (在毎卷:3000)
單位
Differential Surface Mount SOIC Dual, Single Open Collector 2 1.4µs 8 2 → 36 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS庫存編號 166-1847
製造零件編號LM393M
HK$1.088
毎管:90 個
單位
Differential Surface Mount SOIC Dual, Single Open Collector 2 1.4µs 8 2 → 36 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS庫存編號 805-1365
製造零件編號LM311DR2G
HK$2.635
Each (On a Tape of 25)
單位
General Purpose Surface Mount SOIC Dual, Single CMOS 1 200ns 8 36 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS庫存編號 903-3696
製造零件編號LM393N
HK$4.797
毎管:50 個
單位
Differential Through Hole DIP Dual, Single Open Collector 2 1.4µs 8 2 → 36 V 10.15 x 6.35 x 3.3mm 10.15mm 6.35mm 3.3mm -
RS庫存編號 178-4707
製造零件編號LM339NG
HK$5.35
毎管:25 個
單位
General Purpose Through Hole PDIP Dual, Single Open Collector 4 1.3µs 14 5 → 28 V 19.56 x 6.6 x 3.68mm 19.56mm 6.6mm 3.68mm -
RS庫存編號 145-4339
製造零件編號LM393AN
HK$7.863
毎管:50 個
單位
General Purpose Through Hole PDIP Dual, Single Open Collector 2 0.35 μs, 1.4 μs 8 2 → 36 V 9.6 x 6.4 x 3.4mm 9.6mm 6.4mm 3.4mm -
RS庫存編號 759-9396
製造零件編號LM393AN
HK$8.529
/個 (每包:25個)
單位
General Purpose Through Hole PDIP Dual, Single Open Collector 2 0.35 μs, 1.4 μs 8 2 → 36 V 9.6 x 6.4 x 3.4mm 9.6mm 6.4mm 3.4mm -
RS庫存編號 463-666
製造零件編號LM339NG
HK$4.811
/個 (每包:20個)
單位
General Purpose Through Hole PDIP Dual, Single Open Collector 4 1.3µs 14 5 → 28 V 19.56 x 6.6 x 3.68mm 19.56mm 6.6mm 3.68mm -
RS庫存編號 689-9714
製造零件編號LM293DR2G
HK$3.328
/個 (每包:5個)
單位
General Purpose Surface Mount SOIC Dual, Single Open Collector 2 1.3µs 8 3 → 28 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS庫存編號 145-3123
製造零件編號LM2901DG
HK$1.907
毎管:55 個
單位
General Purpose Surface Mount SOIC Dual, Single CMOS, TTL 4 1.3µs 14 36 V 8.75 x 4 x 1.5mm 8.75mm 4mm 1.5mm -
RS庫存編號 145-3854
製造零件編號LM2901VDR2G
HK$1.329
個 (在毎卷:2500)
單位
General Purpose Surface Mount SOIC Dual, Single CMOS, TTL 4 1.3µs 14 3 → 36 V 8.75 x 4 x 1.5mm 8.75mm 4mm 1.5mm -
RS庫存編號 759-9374
製造零件編號LM2903N
HK$3.63
/個 (每包:25個)
單位
General Purpose Through Hole PDIP Dual, Single Open Collector 2 0.2 μs, 1.4 μs 8 2 → 36 V 9.6 x 6.4 x 3.4mm 9.6mm 6.4mm 3.4mm -
全新
RS庫存編號 185-9024
製造零件編號NCS2250SN2T1G
HK$5.831
/個 (每包:13個)
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 689-9718
製造零件編號LM339DR2G
HK$3.00
/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 760-5788
製造零件編號FAN156L6X
HK$1.606
/個 (每包:25個)
單位
Low Voltage Surface Mount MicroPak Single Push-Pull 1 0.0054µs 6 5.5 V 1.45 x 1 x 0.5mm 1.45mm 1mm 0.5mm 60dB
RS庫存編號 145-3855
製造零件編號LM239DTBR2G
HK$1.19
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 -
RS庫存編號 145-3569
製造零件編號LM2901VDTBR2G
HK$1.504
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 -