Comparators

A Comparator is a circuit that accepts two voltages or currents and then switches the output showing which of the two is bigger. Comparators are found in components such as analogue to digital converters (ADCs). Comparators are like operational amplifiers except a comparator is designed specifically 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 either 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 analogue to digital (ADC). Two supply voltages 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
  • Micropower
  • Nano power
  • Precision
  • Push/pull output
  • Quad differential
  • Rail to rail
  • Voltage
  • Window

Mounting Types

Comparators can be found in both surface mount and through-hole mounting configurations to enable use in a wide variety of applications.

Comparator power supply types

Available in both single and dual power supply configurations, a comparator can easily be implemented into a robust solution.

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 168-7454
製造零件編號TS3022IDT
TWD26.00
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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 517-1854
製造零件編號LM293AD
TWD14.50
/個 (每包:20個)
單位
Differential Surface Mount SOIC Dual, Single Open Collector 2 1.3µs 8 3 → 28 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm -
RS庫存編號 121-8671
製造零件編號LM2903D
TWD13.40
毎管:75 個
單位
Differential Surface Mount SOIC Dual, Single Open Collector 2 1.3µs 8 3 → 28 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm -
RS庫存編號 121-8421
製造零件編號LM339N
TWD12.60
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 527-198
製造零件編號LM339N
TWD12.60
/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 649-497
製造零件編號TLC3704CN
TWD54.00
單位
Low Power Through Hole PDIP Single Push-Pull 4 2.7µs 14 5 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm 4.57mm 84dB
RS庫存編號 661-2599
製造零件編號LM339ADR
TWD20.60
/個 (每包:10個)
單位
General Purpose 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 145-6064
製造零件編號TLV3202AIDGK
TWD53.90
毎管:80 個
單位
Low Power Surface Mount MSOP Single Push-Pull 1 2.9ns 8 2.7 → 5.5 V 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 70dB
RS庫存編號 145-1185
製造零件編號LMV762MA/NOPB
TWD79.00
毎管:95 個
單位
Low Power Surface Mount SOIC Single Push-Pull 2 - 8 3 V 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm 100dB
RS庫存編號 144-9912
製造零件編號LM293AD
TWD13.20
毎管:75 個
單位
Differential Surface Mount SOIC Dual, Single Open Collector 2 1.3µs 8 3 → 28 V 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm -
RS庫存編號 121-8704
製造零件編號LM339N/NOPB
TWD41.70
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 145-5720
製造零件編號TLC3704CN
TWD46.10
毎管:25 個
單位
Low Power Through Hole PDIP Single Push-Pull 4 2.7µs 14 5 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm 4.57mm 84dB
RS庫存編號 812-4047
製造零件編號TLV3202AIDGK
TWD57.30
/個 (每包:10個)
單位
Low Power Surface Mount MSOP Single Push-Pull 1 2.9ns 8 2.7 → 5.5 V 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 70dB
RS庫存編號 760-9468
製造零件編號TS3022IDT
TWD51.80
/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 517-2374
製造零件編號LM2903D
TWD14.60
/個 (每包:20個)
單位
Differential Surface Mount SOIC Dual, Single Open Collector 2 1.3µs 8 3 → 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
TWD29.10
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 689-9727
製造零件編號LM393DR2G
TWD20.00
/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 121-8828
製造零件編號LMV7219M5/NOPB
TWD44.50
個 (在毎卷:1000)
單位
General Purpose Surface Mount SOT-23 Single Push-Pull 1 - 5 2.7 → 5 V 2.92 x 1.6 x 1.02mm 2.92mm 1.6mm 1.02mm 85dB
RS庫存編號 162-9353
製造零件編號LM339DTBR2G
TWD4.70
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 169-5572
製造零件編號LM239ADR
TWD4.10
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 -