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 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 530-7514
製造零件編號UPC339C-A
TWD24.40
/個 (每包:5個)
單位
- Through Hole PDIP Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 19.22 x 6.4 x 3.55mm 19.22mm 6.4mm 3.55mm -
RS庫存編號 601-5812
製造零件編號UPC339G2-A
TWD12.60
/個 (每包:5個)
單位
General Purpose Surface Mount SOP Dual, Single Open Collector 4 1.3µs 14 3 → 28 V 10.2 x 4.4 x 1.49mm 10.2mm 4.4mm 1.49mm -
RS庫存編號 601-5761
製造零件編號UPC277G2-A
TWD29.00
/個 (每包:5個)
單位
General Purpose Surface Mount SOP Dual, Single Open Collector 2 1.8µs 8 ±1 → ±16 V 5.2 x 4.4 x 1.49mm 5.2mm 4.4mm 1.49mm -