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
HK$10.677
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 760-9468
製造零件編號TS3022IDT
HK$14.554
/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 920-6355
製造零件編號LM319DT
HK$2.751
個 (在毎卷:2500)
單位
High Speed Surface Mount SOIC Single TTL 2 80ns 14 5 → ±15 V 8.75 x 4 x 1.65mm 8.75mm 4mm 1.65mm -
RS庫存編號 795-8802
製造零件編號LM319DT
HK$6.114
/個 (每包:10個)
單位
High Speed Surface Mount SOIC Single TTL 2 80ns 14 5 → ±15 V 8.75 x 4 x 1.65mm 8.75mm 4mm 1.65mm -
RS庫存編號 714-0714
製造零件編號LM239D
HK$16.83
/個 (每包:20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 168-6423
製造零件編號LM239DT
HK$0.97
個 (在毎卷:2500)
單位
General Purpose Surface Mount SOIC Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 8.75 x 4 x 1.65mm 8.75mm 4mm 1.65mm -
RS庫存編號 920-6361
製造零件編號TS391ILT
HK$2.279
個 (在毎卷:3000)
單位
General Purpose Surface Mount SOT-23 Dual, Single Open Collector 1 0.3µs 5 3 → 28 V 3 x 1.75 x 1.3mm 3mm 1.75mm 1.3mm -
RS庫存編號 877-2762
製造零件編號LM393ST
HK$3.118
/個 (每包:25個)
單位
Low Power Surface Mount MSOP Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.3µs 8 2 → 36 V 3.2 x 3.1 x 0.95mm 3.2mm 3.1mm 0.95mm -
RS庫存編號 145-9534
製造零件編號LM393ST
HK$1.187
個 (在毎卷:4000)
單位
Low Power Surface Mount MSOP Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.3µs 8 2 → 36 V 3.2 x 3.1 x 0.95mm 3.2mm 3.1mm 0.95mm -
RS庫存編號 426-203
製造零件編號TS391ILT
HK$4.998
/個 (每包:10個)
單位
General Purpose Surface Mount SOT-23 Dual, Single Open Collector 1 0.3µs 5 2 → 36 V 3 x 1.75 x 1.3mm 3mm 1.75mm 1.3mm -
RS庫存編號 686-7519
製造零件編號LM239DT
HK$2.541
/個 (每包:25個)
單位
General Purpose Surface Mount SOIC Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 8.75 x 4 x 1.65mm 8.75mm 4mm 1.65mm -
RS庫存編號 145-9203
製造零件編號LM239D
HK$3.15
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 203-3496
製造零件編號TS883IQ2T
HK$15.10
/個 (每包:5個)
單位
Dual Surface Mount DFN Dual Open Drain 2 - 4 0.9 V, 5.5 V - - - - -
RS庫存編號 877-2740
製造零件編號LM211DT
HK$3.455
/個 (每包:20個)
單位
General Purpose Surface Mount SOIC Dual, Single TTL 1 200ns 8 5 V 5 x 4 x 1.65mm 5mm 4mm 1.65mm -
RS庫存編號 189-2126
製造零件編號LM2901Q4T
HK$2.972
/個 (每包:25個)
單位
Low Power Surface Mount QFN Dual, Single CMOS, DTL, ECL, MOS, TTL 4 1.3µs 16 2 → 32 V 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm -
RS庫存編號 168-8805
製造零件編號TS332IQ2T
HK$3.77
個 (在毎卷:3000)
單位
Low Power Surface Mount DFN Single Open Drain 1 - 8 1.6 → 5 V 2.15 x 2.15 x 0.55mm 2.15mm 2.15mm 0.55mm 79dB
RS庫存編號 760-9461
製造零件編號TS3022IST
HK$11.718
/個 (每包:5個)
單位
High Speed Surface Mount MSOP Single Push-Pull 2 0.009µs 8 1.8 → 5 V 3.2 x 3.1 x 0.95mm 3.2mm 3.1mm 0.95mm 67dB
RS庫存編號 165-5284
製造零件編號TSX3702IDT
HK$3.266
個 (在毎卷:2500)
單位
Low Power Surface Mount SOIC Dual, Single Push-Pull 2 2.4µs 8 2.7 → 16 V 5 x 4 x 1.5mm 5mm 4mm 1.5mm 90dB
RS庫存編號 829-1532
製造零件編號TS884IQ4T
HK$16.086
/個 (每包:5個)
單位
Low Power Surface Mount QFN Single Push-Pull 4 - 16 1.1 → 5.5 V 3.15 x 3.15 x 0.95mm 3.15mm 3.15mm 0.95mm 78dB
RS庫存編號 189-1949
製造零件編號LM2902YPT
HK$3.633
/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 -