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 Stock No. 639-6830
Mfr. Part No.TA75S393F(F)
BrandToshiba
SGD1.18
Each (In a Pack of 10)
units
General Purpose Surface Mount SSOP Dual, Single Open Collector 1 1.3µs 5 3 → 28 V 2.9 x 1.6 x 1.1mm 2.9mm 1.6mm 1.1mm -
RS Stock No. 756-3224
Mfr. Part No.TC75W57FU(TE12L,F)
BrandToshiba
SGD1.442
Each (In a Pack of 5)
units
General Purpose Surface Mount SSOP Single Push-Pull 2 0.011µs 8 3 → 5 V 2.9 x 2.8 x 1.1mm 2.9mm 2.8mm 1.1mm -
RS Stock No. 639-6969
Mfr. Part No.TC75W58FK(TE85L,F)
BrandToshiba
SGD1.538
Each (In a Pack of 10)
units
General Purpose Surface Mount SSOP Dual, Single Open Drain 2 0.19µs 8 3 V, 5 V 2 x 2.3 x 0.7mm 2mm 2.3mm 0.7mm -
RS Stock No. 639-6953
Mfr. Part No.TC75W57FK(TE85L,F)
BrandToshiba
SGD2.454
Each (In a Pack of 10)
units
General Purpose Surface Mount SSOP Dual, Single Push-Pull 2 0.011µs 8 3 V, 5 V 2 x 2.3 x 0.7mm 2mm 2.3mm 0.7mm -
RS Stock No. 639-6852
Mfr. Part No.TC75S57FU(TE85L,F)
BrandToshiba
SGD1.152
Each (In a Pack of 10)
units
General Purpose Surface Mount SSOP Dual, Single Push-Pull 1 0.011µs 5 3 V, 5 V 2.9 x 1.6 x 1.1mm 2.9mm 1.6mm 1.1mm -
RS Stock No. 756-3202
Mfr. Part No.TC75S56F(TE85L,F)
BrandToshiba
SGD0.538
Each (In a Pack of 5)
units
General Purpose Surface Mount SSOP Single Push-Pull 1 0.06µs 5 3 → 5 V 2.9 x 1.6 x 1.1mm 2.9mm 1.6mm 1.1mm -
RS Stock No. 639-6868
Mfr. Part No.TC75S58FU(TE85L,F)
BrandToshiba
SGD0.756
Each (In a Pack of 10)
units
General Purpose Surface Mount SSOP Dual, Single Open Drain 1 0.19µs 5 3 V, 5 V 2 x 1.25 x 0.9mm 2mm 1.25mm 0.9mm -
RS Stock No. 639-6846
Mfr. Part No.TC75S56FU(TE85L,F)
BrandToshiba
SGD1.184
Each (In a Pack of 10)
units
General Purpose Surface Mount SSOP Dual, Single Push-Pull 1 0.06µs 5 3 V, 5 V 2 x 1.25 x 0.9mm 2mm 1.25mm 0.9mm -
RS Stock No. 756-3211
Mfr. Part No.TC75S57F(TE85L,F)
BrandToshiba
SGD0.94
Each (In a Pack of 5)
units
General Purpose Surface Mount SSOP Single Push-Pull 1 0.011µs 5 3 → 5 V 2.9 x 1.6 x 1.1mm 2.9mm 1.6mm 1.1mm -
RS Stock No. 756-2805
Mfr. Part No.TA75W393FU(TE12L,F
BrandToshiba
SGD0.734
Each (In a Pack of 10)
units
General Purpose Surface Mount SSOP Dual Open Collector 2 1.3µs 8 - 2.9 x 2.8 x 1.1mm 2.9mm 2.8mm 1.1mm -
RS Stock No. 756-3214
Mfr. Part No.TC75S58F(TE85L,F)
BrandToshiba
SGD0.634
Each (In a Pack of 5)
units
General Purpose Surface Mount SSOP Single Open Drain 1 0.19µs 5 3 → 5 V 2.9 x 1.6 x 1.1mm 2.9mm 1.6mm 1.1mm -