The LM2904 is a versatile and reliable op-amp that can be used in a wide range of applications that require signal amplification or processing.

Catalog

Ⅰ LM2904 Description

The LM2904 is a dual operational amplifier (op-amp) integrated circuit that was designed and manufactured by Texas Instruments. It is commonly used in a variety of applications that require signal amplification or processing, such as audio and video signal processing, active filters, and instrumentation amplifiers.

The LM2904 features two independent, high-gain, low-power op-amps in a single package, which makes it a cost-effective solution for applications that require multiple op-amps. Each op-amp has a wide supply voltage range of 3V to 30V, making it suitable for both single and dual supply voltage applications.

The LM2904 has a common-mode input voltage range that includes the negative supply voltage, which allows it to be used in applications where the input signal may swing below ground. It also has a high input impedance and low input bias current, which minimizes the loading of the input signal and ensures accurate signal amplification.

The LM2904 has a unity-gain bandwidth of 1 MHz and a slew rate of 0.5 V/μs, which means that it can amplify signals up to 1 MHz and respond quickly to fast-changing input signals. It also has a low input offset voltage and low input offset current, which ensure that the output signal accurately reflects the input signal.

The LM2904 is a versatile and reliable op-amp that can be used in a wide range of applications that require signal amplification or processing.

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Ⅱ LM2904 Pinout 

Figure1-LM2904 Pinout

Ⅲ LM2904 Pinout Configuration

Ⅳ LM2904 op-amp Features

• Dual Op-Amp: The LM2904 contains two separate op-amps in a single package, making it a cost-effective solution for applications that require multiple op-amps.

• Low Input Bias Current: The input bias current of the LM2904 is typically only 20nA, making it suitable for use in applications where high input impedance is required.

• Low Input Offset Voltage: The input offset voltage of the LM2904 is typically only 2mV, which means that the voltage at the output of the op-amp is very close to the input voltage.

• Low Quiescent Current: The quiescent current of the LM2904 is typically only 1.3 mA per amplifier, making it suitable for battery-powered applications.

• Wide Supply Voltage Range: The LM2904 can operate from a supply voltage as low as 3V and as high as 32V, making it suitable for use in a wide range of applications.

• High Slew Rate: The LM2904 has a high slew rate of 0.5V/μs, which means that it can respond quickly to changes in the input signal.

• Unity-Gain Stable: The LM2904 is unity-gain stable, which means that it can be used in applications where the gain of the op-amp is set to 1.

• Low Noise: The LM2904 has low noise, which means that it is suitable for use in applications where high accuracy and low noise are required.

• Wide Temperature Range: The LM2904 can operate over a wide temperature range, making it suitable for use in harsh environments.

Ⅴ LM2904 Specifications

Ⅵ Where to Use LM2904 IC?

The IC LM2904 is frequently employed as the IC LM741 double package counterpart. Both ICs will have identical electrical properties. This IC doesn't have latch-up issues, making it ideal for use in voltage-follower applications.

Moreover, this IC has integrated frequency adjustment and short-circuit safety. As a result, it requires the fewest components to employ in various applications. Because of these qualities, LM2904 ICs are widely found in both DVD players and guitar amplifiers.

These ICs draw incredibly little current. Hence, if you're seeking an IC with these qualities, these are the finest options.

Ⅶ How to Use LM2904 IC?

As mentioned earlier this IC requires a minimum number of components to be application ready. A high input impedance non-inverting application circuit diagram from the LM2904 IC datasheet is shown below.

Figure 2-How to Use LM2904 IC

Input supply is given at the non-inverting pin while inverting pin is connected to the ground through a 10k resistor. This circuit gives a closed-loop gain equal to the ratio of the sum of R1 and R2 to R1 and a closed-loop 3 dB bandwidth equal to the amplifier unity-gain frequency divided by the closed-loop gain. The gain of the circuit depends on the R1 and R2:

Set R1 to 10kΩ, and R2 to 99x the value of R1, which would be 990kΩ. Replacing the 990kΩ with a 1MΩ will result in a gain of 101, which is within the desired gain tolerance.

Ⅷ LM2904 IC Circuit

Here is a schematic illustration of the LM2904 integrated circuit. It is possible to construct this circuit using two independent, high-gain op-amps. Internal frequency correction is present in these amplifiers. These ICs are mostly used in industrial and automotive control systems. With a single power source, this circuit can operate across a wide range of voltages.

Figure3-LM2904 IC Circuit

This IC is mostly used in systems with a single power source since it makes implementation simpler. For instance, the typical voltage used in logic systems, such as 5V, can be utilized directly to power these amplifier circuits.

These ICs deliver the required electronic interfaces without the need for an additional power source. In the linear mode, the ground terminal makes up the majority of the i/p common-mode voltage range, and the o/p voltage can also provide to the ground while the system is running on a single power source.

Ⅸ Packages & Dimensions

There are two different packages of this IC: SOIC (8), and PDIP (8). These packages have different dimensions to differentiate them simply.

PDIP (P)

Figure4-LM2904 Packages & Dimensions

SOIC (D)

Figure5-LM2904 Packages & Dimensions

Ⅹ LM2904 Applications

• Comparators
• TransducerAmplifiers
• LED Driver
• Conventional Operational Amplifier circuits
• Fixed Current Source
• Integrator
• Power Amplifier
• Differentiator
• High Compliance Current Sink
• Adder
• Difference Amplifier Input Bias Current
• Voltage follower
• Canceling the Error Caused input bias current
• Digital Multimeters
• Oscilloscopes
• Walkie-Talkie
• Battery Management Solution
• Summing Amplifiers
• Multivibrators
• Oscillators
• DC Gain Block