LM358 High Gain Operational Amplifier DIP-8

LM358 High Gain Operational Amplifier DIP-8 is a versatile and cost-effective dual operational amplifier (Op-Amp) specifically engineered for a broad range of low-power signal conditioning and amplification tasks. This integrated circuit packs two independent, high-gain frequency-compensated Op-Amps into a single 8-pin package, offering design flexibility and space savings. Therefore, the LM358 effectively operates from a single power supply across a wide voltage range, which makes it incredibly simple to integrate into battery-powered and single-supply systems. Because the output voltage range extends down to the negative supply rail (ground in single-supply mode), the LM358 handles ground-referenced signals easily. Furthermore, its low current consumption and reliability have made the LM358 a foundational component in countless analog electronics projects and commercial products worldwide.

Key Features:

• Dual Independent Amplifiers: The IC contains two separate, high-gain Op-Amps, allowing a single chip to perform two distinct functions simultaneously.
• Single-Supply Operation: Consequently, the wide power supply range supports operation from 3 V DC up to 32 V DC, simplifying battery-powered designs.
• High Voltage Gain: Achieve large signal amplification with an open-loop voltage gain of ≈ 100 dB (100,000 times).
• Internal Frequency Compensation: The built-in compensation ensures stability for unity-gain operation, eliminating the need for external compensating capacitors.
• Output Sensing to Ground: The output voltage range includes the negative supply (ground), a crucial feature for low-side current sensing and ground-referenced signal handling.

Technical Specifications:

• Number of Channels: 2 (Dual Op-Amp)
• Supply Voltage Range (V_CC): Single Supply: 3 V to 32 V; Dual Supply: ±1.5 V to ±16 V
• Open Loop Voltage Gain (A_VOL): Typically 100 dB (100,000 V/V)
• Unity Gain Bandwidth: Typically 0.7 MHz (700 kHz)
• Input Bias Current (I_B): Typically 20 nA
• Slew Rate (SR): Typically 0.3 V/μs
• Quiescent Current per Channel: ≈ 0.3 mA
• Operating Temperature Range: 0°C to +70°C

Mechanical Specifications:

• Package Type: 8-Pin Dual In-line Package (DIP-8)
• Mounting: Through-Hole Technology (THT)
• Material: Plastic Encapsulation

Dimensions:

• Body Length: ≈ 9.2 mm
• Body Width: ≈ 6.4 mm
• Pin Pitch (Between pins): 2.54 mm (0.1 inch)
• Row Spacing (Between rows): 7.62 mm (0.3 inch)

Pinout and Wiring:

• Pin 1 (Output 1): The output voltage of Op-Amp 1.
• Pin 2 (Inverting Input 1): The negative signal input for Op-Amp 1.
• Pin 3 (Non-Inverting Input 1): The positive signal input for Op-Amp 1.
• Pin 4 (V_EE/GND): Connect to the negative power supply or ground for single-supply operation.
• Pin 5 (Non-Inverting Input 2): The positive signal input for Op-Amp 2.
• Pin 6 (Inverting Input 2): The negative signal input for Op-Amp 2.
• Pin 7 (Output 2): The output voltage of Op-Amp 2.
• Pin 8 (V_CC): Connect to the positive power supply.

Datasheet Reference:

• Download Texas Instruments LM358 Datasheet

Commonly Used in:

• Sensor Signal Conditioning: Designers rely on the LM358 to amplify the small signals produced by various analog sensors (temperature, light, pressure).
• Active Filters: The dual Op-Amps build second-order low-pass, high-pass, and band-pass active filter circuits.
• Power Management: It frequently performs low-side current sensing and voltage monitoring in power supply circuits.

Applications:

• Comparators: Therefore, the high gain makes the LM358 an excellent choice for basic voltage comparison tasks.
• Audio Pre-amplifiers: It provides essential gain for microphones and low-level audio signals.
• Oscillators and Function Generators: Engineers utilize it to create simple square wave, sine wave, and triangle wave generators.
• Instrumentation Amplifiers: It forms the basis of simple differential and instrumentation amplifiers.

Equivalent Models:

• LM358N (STMicroelectronics/Others): The N suffix typically denotes the standard DIP package, functionally identical.
• LM258 / LM158: These are industrial and military temperature range variants, however, they share the same pinout and core electrical characteristics.
• NE5532: While also a dual Op-Amp, the NE5532 offers better noise and speed performance but typically requires a dual supply, making it less of a direct fit for single-supply designs.

Package Includes:

• 1 x LM358 High Gain Operational Amplifier DIP-8 IC