LM358N
LM358N Dual Operational Amplifier
Overview
The LM358N is a dual operational amplifier that features high gain, internal frequency compensation, and a wide operating voltage range. Designed for single-supply operation, it can also operate from split power supplies while maintaining low power consumption. This makes it suitable for a variety of applications, from industrial controls to consumer electronics.
The device is part of the LM158 series, which includes two independent op-amps in a single package. The LM358N is characterized by its low input offset voltage and low input bias current, making it ideal for precision applications.
Features
- Dual Operational Amplifiers: Contains two independent op-amps in a single package.
- Wide Supply Voltage Range: Operates from a single power supply of 3V to 32V or dual supplies of ±1.5V to ±16V.
- Low Power Consumption: Quiescent current is typically 0.7mA per amplifier, independent of supply voltage.
- Internal Frequency Compensation: Eliminates the need for external components for stability.
- Low Input Offset Voltage: Typically 2mV, ensuring high accuracy in signal processing.
- Low Input Bias Current: Typically 20nA, minimizing errors in high-impedance circuits.
- Available in Multiple Packages: Includes 8-pin DIP, SOIC, and micro SMD chip-sized packages.
- High Gain Bandwidth Product: 1MHz typical, suitable for a wide range of applications.
Applications
The LM358N is versatile and can be used in a variety of electronic circuits, including:
- Signal Conditioning: Used in filtering, amplification, and buffering of analog signals.
- Sensor Interfaces: Ideal for amplifying signals from sensors such as thermocouples, strain gauges, and photodiodes.
- Power Supply Control: Employed in voltage regulators and power management circuits.
- Audio Applications: Used in preamplifiers, tone control circuits, and active filters.
- Industrial Controls: Suitable for process control, motor control, and instrumentation systems.
- Consumer Electronics: Found in devices like battery chargers, LED drivers, and portable electronics.
Electrical Characteristics
The following table summarizes the key electrical specifications of the LM358N under typical operating conditions (VCC = +5V, TA = 25°C unless otherwise noted).
DC Characteristics
- Input Offset Voltage: 2mV (max 7mV)
- Input Bias Current: 20nA (max 150nA)
- Input Offset Current: 2nA (max 30nA)
- Common Mode Rejection Ratio (CMRR): 70dB (min 65dB)
- Supply Voltage Rejection Ratio (PSRR): 100dB (min 80dB)
- Large Signal Voltage Gain: 100V/mV (min 25V/mV)
AC Characteristics
- Gain Bandwidth Product: 1MHz (typical)
- Slew Rate: 0.6V/µs (typical)
- Input Noise Voltage: 40nV/√Hz (typical at 1kHz)
Power Supply Characteristics
- Supply Voltage Range: 3V to 32V (single supply), ±1.5V to ±16V (dual supply)
- Quiescent Current: 0.7mA per amplifier (typical)
Package Information
The LM358N is available in several package options, including through-hole and surface-mount configurations. Below are the details for the most common packages:
8-Pin DIP (Dual Inline Package)
- Package Code: N (DIP-8)
- Dimensions: 9.81mm x 6.35mm x 3.3mm
- Pin Count: 8
- Operating Temperature Range: 0°C to +70°C
8-Pin SOIC (Small Outline Integrated Circuit)
- Package Code: D (SOIC-8)
- Dimensions: 4.9mm x 3.9mm x 1.25mm
- Pin Count: 8
- Operating Temperature Range: -40°C to +85°C
8-Bump micro SMD (Chip-Sized Package)
- Package Code: See AN-1112 for details
- Dimensions: Ultra-compact, suitable for space-constrained applications
- Pin Count: 8
- Operating Temperature Range: -40°C to +125°C
Conclusion
The LM358N is a highly reliable and versatile dual operational amplifier, offering excellent performance for a wide range of applications. Its combination of low power consumption, wide supply voltage range, and robust electrical characteristics make it a preferred choice for designers in both industrial and consumer electronics. With multiple package options, it can be easily integrated into various circuit designs, from prototyping to mass production.
