LM358ADRG4 Integrated Circuits (ICs)

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Linear - Amplifiers - Instrumentation, OP amps, Buffer Amps

The LM358ADRG4 is a dual, low-power, general-purpose operational amplifier with superior performance. This versatile general-purpose amplifier is capable of operation from single or dual supplies and is suitable for a wide range of applications.

Application fields

The LM358ADRG4 can be used in a wide array of fields. It can be used as an audio amplifier, to drive loudspeakers, to drive motor control circuits, to create power supplies, to drive LEDs and relays, and to test signals. In addition, the LM358ADRG4 can be used as an operational amplifier in circuits designed to detect, measure, and indicate properly amplified voltage signals. These amplifiers are also ideal for use in medical instruments, where a low-power and low-noise design is required.

Working Principle

The LM358ADRG4 is an operational amplifier with two separate, internally compensated input devices for superior input characteristics. It can be used as either a single- or dual-input amplifier. The input device has an inverting input terminal and a non-inverting input terminal with an internal feedback resistor, allowing for gain adjustment through variations of the feedback resistor value.

The LM358ADRG4’s internal circuit is composed of two identical op-amps and a wide range of other components, such as resistors and capacitors. These other components form a feedback loop circuit, which allows the amplifier to operate, while controlling the amplifying level and the gain of the output voltage. The closed-loop, single-supply circuit of the amplifier allows for the amplifier’s gain to be adjusted through changing the loop’s feedback resistor value. This resistor is typically placed between the output and the non-inverting input terminals. The output voltage (Vout) is then determined by the following equation:

Vout = Vf – (A×Vin)

In the equation, Vin is the voltage at the non-inverting input terminal, Vf is the voltage at the feedback resistor, and A is the gain of the amplifier. As the input voltage changes, the output voltage also changes; the variation of the output voltage being proportional to the input voltage and gain of the op-amp.

When the LM358ADRG4 is used for AC applications, additional components are required to act as an AC coupling network. The AC coupling network prevents the DC bias from passing from one stage to the other, thus allowing the amplification of only the AC signals at the output.

The LM358ADRG4 also features a temperature-compensated internal voltage reference to maintain a stable output voltage, even with temperature variation. This temperature compensation feature helps to ensure accuracy and consistent performance over a range of temperatures.

Conclusion

The LM358ADRG4 is a reliable, low-power and low-noise operational amplifier that can be used in a wide range of applications, from audio amplification to motor control, power supplies, and voltage measurement signals. Its closed-loop, single-supply circuit allows for gain adjustment through the loop’s feedback resistor and its internal temperature-compensated voltage reference ensures accuracy and consistent performance over a range of temperatures.

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