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 145-3123
製造零件編號LM2901DG
TWD4
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 774-3476
製造零件編號LM2901DG
TWD13
/個 (每包:5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 714-0754
製造零件編號LM2903DT
TWD8
/個 (每包:20個)
單位
General Purpose Surface Mount SOIC Dual, Single CMOS, DL, ECL, MOS, TTL 2 1.3µs 8 2 → 36 V 5 x 4 x 1.25mm 5mm 4mm 1.25mm -
RS庫存編號 178-7406
製造零件編號LM2903PT
TWD3
個 (在毎卷:4000)
單位
Low Power Surface Mount TSSOP Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.3µs 8 2 → 36 V 4.5 x 3.1 x 1.05mm 4.5mm 3.1mm 1.05mm -
RS庫存編號 795-8394
製造零件編號LM2903PT
TWD11
Each (On a Tape of 50)
單位
Low Power Surface Mount TSSOP Dual, Single CMOS, DTL, ECL, MOS, TTL 2 1.3µs 8 2 → 36 V 4.5 x 3.1 x 1.05mm 4.5mm 3.1mm 1.05mm -
RS庫存編號 178-5160
製造零件編號LM2903DT
TWD3
個 (在毎卷:2500)
單位
General Purpose Surface Mount SOIC Dual, Single CMOS, DL, ECL, MOS, TTL 2 1.3µs 8 2 → 36 V 5 x 4 x 1.25mm 5mm 4mm 1.25mm -
RS庫存編號 121-8305
製造零件編號LM311P
TWD15
毎管:50 個
單位
General Purpose Through Hole PDIP Dual, Single Open Collector/Emitter 1 0.165µs 8 5 → 28 V 9.81 x 6.35 x 4.57mm 9.81mm 6.35mm 4.57mm -
RS庫存編號 528-343
製造零件編號LM393DR
TWD5
/個 (每包:25個)
單位
General Purpose 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 100-0752
製造零件編號LM393D
TWD6
毎管:75 個
單位
General Purpose 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 779-8928
製造零件編號LT1011ACN8#PBF
TWD194
/個 (每包:2個)
單位
General Purpose Through Hole PDIP Dual CMOS, Open Collector, TTL 1 150ns 8 - 10.16 x 6.477 x 3.302mm 10.16mm 6.477mm 3.302mm 115dB
RS庫存編號 154-7676
製造零件編號LT1011ACN8#PBF
TWD139
毎管:50 個
單位
General Purpose Through Hole PDIP Dual CMOS, Open Collector, TTL 1 150ns 8 - 10.16 x 6.477 x 3.302mm 10.16mm 6.477mm 3.302mm 115dB
RS庫存編號 463-155
製造零件編號LM339DG
TWD5
/個 (每包:50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 178-4788
製造零件編號LM339DG
TWD6
毎管:55 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 759-9396
製造零件編號LM393AN
TWD32
/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 460-566
製造零件編號LM339AM/NOPB
TWD29
/個 (每包:10個)
單位
General Purpose Surface Mount SOIC Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 8.64 x 3.91 x 1.45mm 8.64mm 3.91mm 1.45mm -
RS庫存編號 903-3696
製造零件編號LM393N
TWD16
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 144-9913
製造零件編號LM339AD
TWD4
毎管:50 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 517-1882
製造零件編號LM339AD
TWD7
/個 (每包:20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 787-8611
製造零件編號LM2903VDG
TWD13
/個 (每包:14個)
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 145-4339
製造零件編號LM393AN
TWD21
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 -