LM358P: Comprehensive Analysis of Classic Low-Power Dual Operational Amplifiers

The LM358P is a low power dual operational amplifier that was designed specifically for single power supply applications. It comprises two independent high gain operational amplifiers which provide  internal frequency compensation as well. It is suitable for the applications such as analog signal processing, control systems, and general purpose amplification.

Features

• Wide supply range of 3V to 36V (B, BA versions)
• Quiescent current: 300µA/ch (B, BA versions)
• Unity-gain bandwidth of 1.2MHz (B, BA versions)
• Common-mode input voltage range includesground, enabling direct sensing near ground
• 2mV input offset voltage maximum at 25°C (BAversion)
• 3mV input offset voltage maximum at 25°C (A, Bversions)
• Internal RF and EMI filter (B, BA versions)
• On products compliant to MIL-PRF-38535, allparameters are tested unless otherwise noted. Onall other products, production processing does notnecessarily include testing of all parameters.

Applications

1. Commercial Network and Server Power Supply Units (PSUs)

Use: Used in voltage and current sensing circuits to amplify and filter output signals.

Functions:

Overvoltage/undervoltage comparator

Current feedback control amplifier

Error amplifier for PWM control loops

2. Multifunction Printers (e.g., Inkjet, Laser)

Use: Processes sensor signals and assists in drive control.

Functions:

Amplifies paper sensor signals

Feedback loop for printhead temperature monitoring

Signal conditioning for motor position sensing

3. Power Supplies and Mobile Chargers

Use: Monitors battery voltage and current to ensure safe charging.

Functions:

Voltage comparator for overvoltage/undervoltage protection

Error amplifier in constant voltage/current control loop

Current sensing amplifier for feedback control

4. Motor Control (AC Induction, Brushed/Brushless DC, High/Low Voltage, Permanent Magnet, Stepper Motors)

Use: Integral to feedback control systems.

Functions:

Current sensing and amplification (e.g., Hall sensor signals)

Closed-loop feedback for speed and position control

Temperature and load detection via comparator

5. Desktop Computers and Motherboards

Use: Monitors system voltage, current, and temperature.

Functions:

Error amplifier in power management ICs

Temperature sensor signal processing (e.g., thermistors)

Power rail voltage comparison and protection

6. Indoor and Outdoor Air Conditioners

Use: Processes environmental sensing and control signals.

Functions:

Temperature and humidity sensor signal amplification

Wind speed or pressure sensor signal conditioning

Voltage/current comparison in control loops

7. Washing Machines, Dryers, and Refrigerators

Use: Interfaces with various sensors for feedback and control.

Functions:

Water level sensor signal conditioning

Motor current detection and control

Temperature control signal amplification and comparison

8. AC Inverters, String Inverters, Central Inverters, and Frequency Converters

Use: Amplifies voltage/current sensing for feedback control.

Functions:

Error amplifier in sine wave control

Current feedback for closed-loop control

Voltage detection and over/under-voltage comparator

9. Uninterruptible Power Supplies (UPS)

Use: Monitors battery and power states, supports control logic.

Functions:

Battery voltage and current sensing amplification

Voltage threshold comparators for switching

Control signal amplification and conditioning

10. Electronic Point of Sale (POS) Systems

Use: Signal interface, power management, and battery control.

Functions:

Error amplifier in power regulation feedback circuits

Signal filtering for buttons or touch inputs

Battery level detection and comparison

Package

PINOUT

D, DDF, DGK, P, PS, PW, and JGPackage8-Pin SOIC,

SOT23-8, VSSOP, PDIP, SO, TSSOP,and CDIPTop View

D, DDF, DGK, P, PS, PW, and JGPackage8-Pin SOIC,

SOT23-8, VSSOP, PDIP, SO, TSSOP,and CDIPTop View

Absolute Maximum Ratings

Conclusion

The LM358P is an old school operational amplifier (op-amp) chip, which is still widely used today. For all that it's been around for years, it still makes up the heart of many products on the market today. Whether you are an introductory student or veteran engineer, it is capable to meet your electronics application requirement without any delay.
When you want a low low price, easy to use and ultra compatible dual operational amplifier IC, then this is the again of your choice for sure.