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 601-5777
製造零件編號UPC311C-A
TWD41.00
/個 (每包:5個)
單位
- Through Hole PDIP Dual, Single Open Collector 1 0.2µs 8 9 → 28 V 10.16 x 6.4 x 4.31mm 10.16mm 6.4mm 4.31mm -
RS庫存編號 169-5575
製造零件編號LM311PW
TWD11.90
毎管:150 個
單位
General Purpose Surface Mount TSSOP Dual, Single Open Collector/Emitter 1 0.165µs 8 5 → 28 V 3 x 4.4 x 1.15mm 3mm 4.4mm 1.15mm -
RS庫存編號 163-2420
製造零件編號LM393DR2G
TWD3.40
個 (在毎卷:2500)
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 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 768-1369
製造零件編號MCP6541UT-E/OT
BrandMicrochip
TWD12.90
/個 (每包:10個)
單位
General Purpose Surface Mount SOT-23 Single Push-Pull 1 - 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 527-738
製造零件編號LM293DR
TWD11.90
/個 (每包:25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 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 -
RS庫存編號 165-5543
製造零件編號TS391IYLT
TWD10.40
個 (在毎卷:3000)
單位
General Purpose Surface Mount SOT-23 Dual, Single CMOS, DTL, ECL, TTL 1 1.3 ns/μs, 300 ns/μs 5 ±2 → ±36 V 1.75 x 3 x 1.3mm 1.75mm 3mm 1.3mm -
RS庫存編號 534-2999
製造零件編號LM392N/NOPB
TWD55.00
單位
Low Power Through Hole MDIP - - - - 8 - 9.27 x 6.35 x 3.3mm 9.27mm 6.35mm 3.3mm -
RS庫存編號 810-267
製造零件編號LM2903P
TWD17.00
單位
Differential Through Hole PDIP Dual, Single Open Collector 2 1.3µs 8 3 → 28 V 9.81 x 6.35 x 4.57mm 9.81mm 6.35mm 4.57mm -
RS庫存編號 661-2804
製造零件編號LM311PW
TWD17.20
/個 (每包:10個)
單位
General Purpose Surface Mount TSSOP Dual, Single Open Collector/Emitter 1 0.165µs 8 5 → 28 V 3 x 4.4 x 1.15mm 3mm 4.4mm 1.15mm -
RS庫存編號 822-9937
製造零件編號LT1721CS#PBF
TWD374.00
單位
Low Power Surface Mount SOIC Single Rail to Rail, Swing 4 2.5ns 16 2.7 → 6 V 5.004 x 3.988 x 1.498mm 5mm 3.988mm 1.498mm 70dB
RS庫存編號 121-9135
製造零件編號TL331IDBVR
TWD7.40
個 (在毎卷:3000)
單位
General Purpose Surface Mount SOT-23 Dual, Single Open Collector 1 1.3µs 5 3 to 28 V 2.9 x 1.6 x 1.15mm 2.9mm 1.6mm 1.15mm -
RS庫存編號 732-1193
製造零件編號LM193JG
TWD332.00
單位
Differential Through Hole CDIP Dual, Single Open Collector, Open Drain 2 1.3µs 8 2 → 36 V 10.16 x 7.11 x 4.57mm 10.16mm 7.11mm 4.57mm -
RS庫存編號 121-8871
製造零件編號LM393M/NOPB
TWD39.00
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 162-9577
製造零件編號NCV2903DR2G
TWD4.20
個 (在毎卷:2500)
單位
General Purpose Surface Mount SOIC Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.5µs 8 2 → 36 V dc 5 x 4 x 1.5mm 5mm 4mm 1.5mm -
RS庫存編號 669-6275
製造零件編號MCP6562-E/SN
BrandMicrochip
TWD26.20
/個 (每包:5個)
單位
General Purpose Surface Mount SOIC Single Push-Pull 2 - 8 3 V, 5 V 4.9 x 3.9 x 1.25mm 4.9mm 3.9mm 1.25mm 66dB
RS庫存編號 536-1388
製造零件編號LM393M/NOPB
TWD32.00
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 822-6581
製造零件編號LT1715HMS#PBF
TWD382.00
單位
Low Power Surface Mount MSOP Single CMOS, Rail to Rail, TTL 2 2ns 10 2.7 → 12 V 3 x 3 x 0.86mm 3mm 3mm 0.86mm 70dB
RS庫存編號 661-2573
製造零件編號LM239ADR
TWD11.00
/個 (每包:10個)
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 -