The LM358DR is a dual op amp, which has two independent amplifiers. Each amplifier can work independently or can be connected together. Usually used in analog signal processing and amplification circuits.

LM358DR has the characteristics of low noise, low distortion, high speed, high bandwidth, etc. It adopts a dual-channel design, which means it has two independent operational amplifiers inside. Such devices are commonly used in various electronic devices such as power management, signal processing, sensor interfaces, etc.

Ⅰ.Specification parameters of LM358DR

•Package:Reel
•Number of circuits:2
•Number of channels:2
•Number of pins:8
•Height:27 mm
•Length:4.9 mm
•Width:3.91 mm
•Series:LM358
•Technology:Bipolar
•Common mode rejection ratio:65 dB
•Voltage gain dB:100 dB
•Power supply type:Single, Dual
•Ib-input bias current:250 nA
•Number of channels:2 Channel
•Supply voltage-Minimum:3 V
•Supply voltage-Maximum:32 V
•Operating power supply current:350 uA
•Vos-input bias voltage:7 mV
•SR-slew rate:300 mV/us
•Product Category:Operational Amplifier-Operational Amplifier
•CMRR-Common Mode Rejection Ratio:80 dB
•Output current per channel:20 mA
•GBP-gain bandwidth product:700 kHz
•Minimum operating temperature:0℃
•Maximum operating temperature:+70℃
•Package/Case:SOIC-8
•Shutdown:No Shutdown
•Installation style:SMD/SMT
•Input compensation drift:7.00 µV/K
•Features:Standard Amps
•Input type:Rail-to-Rail
•Product:Operational Amplifiers
•Minimum dual supply voltage:+/- 1.5 V
•Maximum dual supply voltage:+/- 16 V
•Amplifier type:High Gain Amplifier
•en-Input voltage noise density:40 nV/sqrt Hz
•Dual supply voltage:+/- 3 V, +/- 5 V, +/- 9 V
•Operating power supply voltage:3 V to 32 V, +/- 1.5 V to +/- 16 V
•Vcm-common mode voltage:Negative Rail to Positive Rail-1.5 V

Ⅱ.Features of LM358DR

1.Dual operational amplifiers: LM358DR integrates two independent operational amplifiers, which can be used in various analog circuit applications.

2.Low distortion: This amplifier can maintain signal integrity and reduce distortion during signal processing.

3.Low noise: The noise figure of LM358DR is very low, which can ensure the high fidelity of the signal, thus improving the performance of the system.

4.Wide operating voltage range: The operating voltage range is ±12 V to ±20 V, adapting to different power environments.

5.Typical applications: LM358DR is commonly used in various analog circuit applications such as power management, sensor signal processing, signal conditioning, amplification, and filtering.

6.Low power consumption: It adopts a low power consumption design and is suitable for battery-powered applications that require long-term operation or systems that require low power consumption.

7.Low input bias current: LM358DR has low input bias current, which helps reduce errors generated at the input end.

8.Wide power supply voltage range: The operating voltage range of LM358DR is usually 3V to 32V in single power supply mode and ±1.5V to ±16V in dual power supply mode, which makes it suitable for a variety of power supply situations.

9.High input impedance: The input impedance is 10 MΩ, which can reduce the loss of input signal.

10.High speed: LM358DR has high-speed response characteristics and can quickly process analog signals.

11.Wide bandwidth: It has a relatively high bandwidth, can handle high-frequency signals, and is suitable for some applications that require fast response.

12.Input voltage range: Its input voltage range is wide and can accept input signals close to ground, which makes it more flexible in single power supply applications.

Ⅲ.Application fields of LM358DR

1.Communication system: LM358DR is used for analog signal processing and power amplification of communication systems. In communication systems, analog signal processing is a key step for processing received analog signals, such as audio signals, radio frequency signals, etc. The high performance parameters of the LM358DR make it an ideal choice in this field. Its low noise, low distortion and high bandwidth ensure high quality output when processing these signals.

2.Power management: LM358DR can be used to design voltage regulators, switching power supplies and battery management circuits to stabilize and manage power output.

•Voltage regulator design: LM358DR can be used as an error amplifier to achieve output voltage stability in a voltage regulator circuit. Through the negative feedback mechanism, the LM358DR can compare the difference between the output voltage and the reference voltage and adjust the output of the power supply to keep it stable. This application makes the LM358DR ideal for designing linear and switch-mode regulators.

•Switching power supply control: In switching power supplies, LM358DR can be used as a PWM (pulse width modulation) controller to achieve stable power output by controlling the switching tube. Its high-speed response and high-bandwidth characteristics allow it to quickly adjust the duty cycle of the PWM signal to accurately control the output voltage and current.

•Battery management circuit: In battery-powered applications, LM358DR can be used in battery management circuits to achieve battery overcharge, over-discharge and over-current protection. By detecting the voltage and current of the battery, the LM358DR can control the charging and discharging process to protect the battery from damage and extend its service life.

3.Signal conditioning and control: In industrial automation, instrumentation and control systems, LM358DR can be used for signal conditioning, voltage comparison, control feedback, etc. to achieve signal processing and system control functions.

•Signal conditioning: LM358DR can receive analog signals generated by sensors or other signal sources, and through amplification, filtering, etc., condition the signals into a form suitable for subsequent circuit processing. This is critical for converting physical quantities (such as temperature, pressure, light intensity, etc.) into electronic signals for further digital processing or display.

•Voltage comparison: LM358DR also has a voltage comparison function, which can compare the difference between the input signal and the set reference voltage, and output the corresponding logic level. This feature makes it widely used in various control systems, such as detecting thresholds, triggering alarms, or implementing logic control.

•Control feedback: In closed-loop control systems, LM358DR is often used as an error amplifier to compare the feedback signal with the expected signal, generate an error signal, and adjust the control output based on the error signal to achieve stable control of the system. This feedback mechanism helps improve the accuracy and stability of the system.

4.Voltage follower: LM358DR can be used as a voltage follower to adjust the output voltage by following changes in the input signal. It is often used to provide a stable reference voltage or follow a voltage source.

5.Instrumentation: LM358DR is used for signal conditioning of precision instruments such as oscilloscopes and spectrum analyzers. LM358DR is often used as the core component of signal conditioning circuits. It can receive input signals and perform amplification, filtering, offset adjustment and other operations to optimize the waveform and quality of the signal, making it suitable for oscilloscope display and analysis. The spectrum analyzer needs to perform frequency domain analysis on the signal and convert the time domain signal into a frequency domain signal. LM358DR can be used for signal preprocessing, such as amplification, filtering, etc., to ensure that the signal has appropriate amplitude and frequency characteristics before entering the spectrum analyzer.

6.Audio signal processing: LM358DR is used for audio amplification, filtering and equalization.

•Audio amplification: LM358DR can be used as an audio amplifier to amplify the power of audio signals. Although it is mainly used for small signal amplification, with proper circuit design and configuration, it can still provide enough gain to drive speakers or headphones.

•Filtering: In audio processing, filtering is a critical step used to remove unwanted frequency components or noise. The LM358DR can be configured into various filters such as low-pass, high-pass, band-pass or band-stop filters to extract or suppress signals within a specific frequency range.

•Equalization: Audio equalization refers to the process of improving sound quality by adjusting the frequency distribution of audio signals. The LM358DR can be used to build a simple audio equalizer circuit that enhances or attenuates signals in specific frequency bands by adjusting the gain.

7.Temperature measurement and control: In temperature sensor measurement and temperature control systems, LM358DR can be used to amplify and process sensor output signals, and cooperate with other components to achieve temperature measurement and control.

8.Control loop: LM358DR is used for signal amplification and comparison in industrial control systems. In industrial control systems, the signals generated by various sensors and actuators are often weak and need to be amplified before they can be recognized by subsequent processing devices or display devices. LM358DR has the characteristics of low noise, low distortion and low input bias current, which can ensure that the signal is transmitted to subsequent circuits without distortion during the amplification process.

9.Analog signal processing: In analog signal processing circuits, LM358DR can be used to design oscillators, integrators, differentiators, etc., to generate, process and regulate analog signals.

10.Comparator: LM358DR can be used as a comparator to detect the relationship between the input signal and the reference voltage. It is often used in applications such as voltage comparison, switch control and level detection.

11.Signal conditioning: In terms of sensor signal processing, amplification and filtering, LM358DR can be used to amplify weak signals, filter out noise, and adjust signal amplitude and frequency.

Ⅳ.Absolute Maximum Ratings of LM358DR
over operating temperature ambient range (unless otherwise noted)

Ⅴ.Functional Block Diagram of LM358DR

Ⅵ.Measures to avoid static electricity damage to LM358DR

1.Grounded operating surface: During operation, use a grounded operating surface or wear electrostatic protective gloves and other equipment to discharge static electricity to the ground.

2.Wear electrostatic protective clothing: Wear electrostatic protective clothing or shawl to prevent static electricity from accumulating on the body and discharge it through grounding.

3.Use electrostatic protective mat: During operation, lay an electrostatic protective mat on the work surface to prevent the accumulation of static electricity.

4.Static elimination devices: Place static elimination devices, such as static eliminators, static elimination hand straps, etc., around the work surface and work area to help eliminate or reduce the accumulation of static electricity.

5.Avoid dry environments: Static electricity is more likely to be generated and accumulated in dry environments, so maintaining a moderate humidity in the working environment can help reduce the generation of static electricity.

6.Handle and store components properly: When handling LM358DR or other electronic components, avoid direct contact with the pins of the components, try to use static protection bags to store components, and ground yourself before operation.

7.Regular inspection and maintenance: Regularly check whether the electrostatic protection measures in the working environment are effective, and maintain the protective equipment to ensure its normal operation.

Ⅶ.Optimize the performance of LM358DR

1.Supply voltage optimization: The operating voltage range of LM358DR is 3V to 32V in single power supply mode and ±1.5V to ±16V in dual power supply mode. Choosing the appropriate supply voltage range allows it to operate at its best working condition.

2.Reduce input bias current: Adopting appropriate circuit design and component selection can reduce the input bias current of LM358DR and reduce the impact on circuit performance.

3.Input and output resistance matching: In order to reduce errors and improve performance, the resistances at the input and output ends can be matched as much as possible to ensure the stability and accuracy of signal transmission.

4.Noise optimization: Consider reducing the noise level of LM358DR in the design. Filtering, isolation and other methods can be adopted to reduce the interference of noise on the signal.

5.Reduce the input offset voltage: The input offset voltage of LM358DR will have a certain impact on performance. Through appropriate circuit design and calibration methods, the input offset voltage can be reduced and the accuracy and stability of the amplifier can be improved.

6.Good layout design: In the circuit board layout design, arrange the LM358DR and other components reasonably to avoid interference and crosstalk and ensure the stability and reliability of signal transmission.

7.Maintain a suitable operating temperature: Try to run the LM358DR within a suitable operating temperature range to avoid excessively high or low temperatures affecting its performance.

8.Reasonable load matching: For the load at the output end, an appropriate load matching method must be selected to ensure that the LM358DR can provide stable and reliable output.

Ⅷ.Application Schematic of LM358DR

Frequently Asked Questions

1.How many operational amplifiers are integrated into LM358DR?
LM358DR integrates two independent operational amplifiers into a single package.

2.What is the typical operating voltage range of LM358DR?
The typical operating voltage range of LM358DR is 3V to 32V in single-supply mode and ±1.5V to ±16V in dual-supply mode.

3.What type of device is LM358DR?
LM358DR is a dual operational amplifier (op-amp) integrated circuit.

4.How to reduce the temperature effect of LM358DR?
In order to reduce the temperature effect of LM358DR, the following measures can be taken: optimizing heat dissipation design, temperature compensation, selecting appropriate packaging, controlling the working environment, etc.