Understanding CMP04FS Comparator Specifications and Uses

You use the cmp04fs comparator to check two signals. It helps you make choices in digital circuits. This device is precise and uses little power. It works well with LM139, LM239, and LM339. Many engineers and hobbyists trust the comparator for good results. You see it used in these ways:

1. Output strobing helps with timing in measurement circuits.

2. Limit detection is useful for battery monitoring.

3. Schmitt trigger action keeps switching steady in noisy places.

4. Oscillators make clock signals for digital systems.

5. Bipolar voltage comparison helps with mixed-signal jobs.

Picking the right comparator can make your digital projects more accurate and steady.

Key Takeaways

• The CMP04FS comparator helps compare two signals in digital circuits. It is very accurate because its input offset voltage is only 1 mV.

• This comparator uses little energy. It needs only about 1.5 mW for each comparator. This makes it great for devices that use batteries. It also works well in places with lots of noise.

• The CMP04FS has a quad design. This means you can compare many signals at the same time. It makes circuit design easier and lowers the cost of parts.

CMP04FS Comparator Overview

What Is the CMP04FS Comparator?

The cmp04fs comparator helps you compare two signals in a circuit. It checks which signal is bigger and gives a clear answer. You can find it in measurement, control, and digital systems. The cmp04fs comparator has four comparators in one chip. This means you can do more than one job at the same time. It saves space and makes your circuit easier to build.

Here are some main technical specifications:

Specification	CMP04FS
Supply Voltage Range	3.3 V to 36 V (±1.65 V to ±18 V)
Input Offset Voltage (Max)	1 mV
Response Time (typ.)	300 ns (large signal), 1.3 µs (small signal)
Power Consumption	~1.5 mW per comparator

You can use this comparator for output strobing, limit detection, and as a Schmitt trigger. These uses help your digital circuits stay steady and work well.

Key Benefits and Importance

If you pick the cmp04fs comparator, you get high accuracy and low power use. This is good for digital projects that use batteries or work in noisy places. The input offset voltage is as low as 1 mV, so you get very exact results. The comparator only uses about 1.5 mW, so it is great for saving power.

Let’s look at how it compares to other comparators:

Feature	CMP04FS	LM339
Input Offset Voltage	1 mV	2 mV
Power Consumption per Comparator	1.5 mW	Higher

It also blocks noise well, so your digital signals stay clean. The cmp04fs comparator gives better accuracy and lower output saturation voltage than many others. You can count on it to work well in your digital circuits.

CMP04FS Comparator Features and Specifications

Electrical Characteristics

It is important to know the electrical characteristics of the cmp04fs comparator. This helps you use it well in digital projects. The comparator works with supply voltages from 3.3 V to 36 V. You can use it in many circuits, even ones needing high voltage gain. The cmp04fs comparator gives low input offset voltage. This means your measurements are more accurate. It also uses little power, so batteries last longer.

Here is a table with the main electrical specifications:

Characteristic	Value
Input Offset Voltage (Max)	1 mV @ 5V
Input Bias Current (Max)	0.1 µA @ 5V
Supply Current (Quiescent Max)	3 mA
Supply Voltage Range	3.3 V to 36 V
Power Consumption per Comparator	~1.5 mW

The comparator has low input bias current and low input offset voltage. These features help you get accurate and reliable results in sensitive circuits. Low power use means you can use it in portable or always-on devices.

Performance Features

The cmp04fs comparator is known for strong performance. It reacts fast, so digital circuits respond quickly to changes. The small-signal response time is about 1.3 microseconds. The large-signal response time is 300 nanoseconds. This speed helps you catch quick changes in signals.

It also blocks noise very well. The comparator has a common-mode rejection ratio and power supply rejection ratio up to 100 dB. This keeps your circuit stable, even in noisy places. The input offset voltage is usually 0.4 mV and never more than 1 mV. This keeps your results accurate. The comparator uses about 1.5 mW of power, so it is good for designs that need low power.

Here is a table with the key performance features:

Feature	Value/Description
Small-Signal Response Time	1.3 µs
Large-Signal Response Time	300 ns
Common-Mode Rejection Ratio	100 dB
Power Supply Rejection Ratio	100 dB
Low Input Offset Voltage	Max 1 mV (typical 0.4 mV)
Low Power Consumption	~1.5 mW per comparator
Fast Response Times	Yes
Excellent Noise Rejection	Yes

You can trust this comparator for accuracy and reliability. It works well in digital circuits that need quick and exact decisions. The cmp04fs comparator meets or beats standards for quad comparators. It gives steady performance from -40°C to +85°C.

Tip: Use the cmp04fs comparator in circuits that need both speed and accuracy. It helps digital systems work better, even when there is noise.

Quad Comparator Design

The cmp04fs comparator has four independent comparators in one chip. This quad design lets you compare many signals at the same time. You save space on your circuit board and use fewer parts. This makes your design simpler and can lower costs.

Here is a table that shows the benefits of the quad comparator design:

Feature	Benefit
Quad Comparator Design	Four channels in one package for compact circuit design
Multi-Channel Capability	Compare several signals at once, perfect for digital systems
Cost Efficiency	Fewer parts mean lower costs and easier assembly

You can use the cmp04fs comparator in many digital applications, like sensor arrays or multi-channel monitoring. The quad design gives you flexibility and helps you build reliable circuits with fewer components.

Note: The quad comparator design is great for digital projects that need to handle more than one signal at a time. You get more features and better performance in a single chip.

CMP04FS Comparator Operation

Working Principle

The CMP04FS comparator checks which voltage is bigger. It looks at two input signals and gives a digital answer. If the first input is higher, the output goes low. If the second input is higher, the output stays high. This helps you make quick choices in digital circuits. The comparator works fast and gives a clear result. You can use it in simple or hard projects and trust it to work well.

Pin Configuration

The CMP04FS comes in a 14-pin package. Each comparator has its own input and output pins. You connect your signals to the input pins. The output pins show the digital answer. There are also pins for power and ground. Using the right pinout helps your comparator work best. The layout is simple, so you can add it to your digital designs easily.

• Pin 1-3, 5-7, 9-11, 13: Inputs and outputs for four comparators

• Pin 4: Ground

• Pin 12: Power supply

Tip: Always look at the datasheet to check the pin setup before building your circuit.

Internal Structure

The CMP04FS comparator has special parts for high accuracy and low power use. Inside, there are two transistors that compare the input voltages. A differential amplifier makes small voltage changes bigger for better results. The open-collector output gives a clean digital signal. Protection diodes keep the circuit safe from voltage spikes. You can use an outside pull-up resistor to set the output high if you need.

Component	Function
Pair of transistors	Compare the input voltages with low bias currents for stability.
Differential amplifier	Makes small voltage differences bigger for a good response.
Open-collector output	Gives a clean digital output after comparing the inputs.
Protection diodes	Keep the circuit safe from voltage spikes.
External pull-up resistor	Sets the output high when needed.

These features help the comparator work well in digital circuits. You get steady results, low power use, and good operation in many uses.

CMP04FS Comparator Applications

General-Purpose Uses

The cmp04fs comparator works in lots of digital circuits. You can make voltage detectors, window comparators, and level shifters with it. In devices that use batteries, it checks voltages to keep circuits safe. You see it in alarms, sensor circuits, and timing circuits. The quad design lets you watch many signals at the same time. This makes your projects work better and saves time.

Precision and High-Speed Applications

The comparator is great for jobs that need accuracy and speed. It helps in analog-to-digital converter circuits by comparing signals when sampling. This gives you good data and quick sampling. In fast data collection, the comparator helps you get better results. It is also used in signal conditioning to keep things working well, even if there is noise.

Here is a table that shows how the comparator helps in these jobs:

Feature	Description
Low Input Offset Voltage	Lets you find small voltage changes, which is important for accuracy.
Fast Response Times	Helps you handle signals fast, good for quick sampling.
Excellent Noise Rejection	Keeps things working well in noisy places, great for signal conditioning.
Low Power Consumption	Makes it good for portable measuring and data devices.

Logic Family Compatibility

You can use the comparator with many types of digital logic. It works with CMOS and TTL circuits. This means it fits into most digital systems easily. The open-collector output lets you connect to different voltage levels. You get steady switching and can use it with digital and analog-to-digital converter designs. This makes it easy to build circuits that need fast data and accurate sampling.

CMP04FS Comparator Replacement Guide

Selection Criteria

When you want to swap out the cmp04fs comparator, you must check important features. First, look at the supply voltage range. Next, check the input offset voltage and response time. These things decide how well your circuit works. The new comparator should be just as accurate or even better. If you use it in adc or sampling circuits, pick one with fast response and low offset voltage. Always make sure the new part fits your board and matches the pin layout. This guide helps you keep your circuits working right.

Compatible Alternatives

You have a few choices for a replacement. The cmp04fs comparator is often swapped with the CMP04FSZ. This one works the same and is better for the environment. You can also use LM139, LM239, or LM339. These comparators work in many adc and sampling circuits. They fit the same package and have similar features. The table below shows how these options compare:

Comparator	Manufacturer	Input Offset Voltage (Max)	Supply Voltage Range	Response Time (typ.)	Power Consumption	Output Type	Package	Status
CMP04FS	Analog Devices	1 mV	3.3 V to 36 V	300 ns	~1.5 mW	Open-collector, TTL/CMOS compatible	SOIC-14	Obsolete
LM139	Texas Instruments	2 mV	2 V to 36 V	~1.3 µs	Higher	Open-collector, TTL compatible	SOIC-14, DIP-14	Active
LM239	Texas Instruments	2 mV	Same as LM339	~1.3 µs	Higher	Same	SOIC-14, DIP-14	Active
LM339	Texas Instruments	2 mV	2 V to 36 V	~1.3 µs	Higher	Open-collector, TTL compatible	SOIC-14, DIP-14	Active

Replacement Tips

Use these tips to make swapping easy:

• Pick CMP04FSZ if you want the same performance.

• Try LM139, LM239, or LM339 if you need a common comparator.

• Always check the pinout and package before you start.

• Test your circuit after you swap to make sure it works well.

• Think about price and how easy it is to get the new part.

Tip: The cmp04fs comparator was made to replace LM139, LM239, and LM339. You can use these choices for most jobs, even adc and sampling circuits.

The CMP04FS comparator gives you very accurate results. It has low offset voltage and switches fast. You should look at datasheets to learn more. Make sure it works with your logic family for the best results.

• LM393D can be used with TTL, DTL, ECL, MOS, and CMOS logic families.

Feature	Benefit
Precision	Helps you process signals accurately
Versatility	Works in many types of circuits

Check the datasheets if you want more technical information.

 

 

 

 

 

Written by Jack Elliott from AIChipLink.

 

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