LM358D Detailed explanation of pin function specifications and circuit principle instructions
The LM358 D is an operational amplifier (op-amp) produced by various semiconductor manufacturers, with the LM358 series being a general-purpose dual op-amp. The "D" at the end of the part number typically denotes a specific package or a manufacturer-specific variant of the device. This op-amp is known for being cost-effective and versatile, often used in analog signal processing, voltage amplifiers, and filtering applications.
Package Type and Pinout
The LM358D typically comes in an 8-pin dual in-line package (DIP-8), but it can also be available in surface-mount packages (like SOIC-8). It is important to verify the exact part number and manufacturer for any slight variations in packaging, but the core functionality remains consistent.
Here’s the detailed pinout and function of each of the 8 pins of the LM358D in the DIP-8 package:
Pin Number Pin Name Description 1 Output (Op-Amp 1) Output pin for the first operational amplifier (U1). 2 Inverting Input (Op-Amp 1) Inverting input for the first operational amplifier (U1). 3 Non-Inverting Input (Op-Amp 1) Non-inverting input for the first operational amplifier (U1). 4 V- (Negative Power Supply) Negative power supply pin (ground or negative voltage). 5 Non-Inverting Input (Op-Amp 2) Non-inverting input for the second operational amplifier (U2). 6 Inverting Input (Op-Amp 2) Inverting input for the second operational amplifier (U2). 7 Output (Op-Amp 2) Output pin for the second operational amplifier (U2). 8 V+ (Positive Power Supply) Positive power supply pin (positive voltage).General Circuit Principle
The LM358D contains two independent, high-gain, internally compensated operational amplifiers. These op-amps are typically used in a variety of signal processing applications, including:
Voltage amplification (e.g., for sensors). Filter design. comparator circuits. Buffering or impedance matching. Integrator and differentiator configurations.LM358D has a low power consumption and is designed to operate with a single or dual power supply. The op-amps inside this IC can be used in configurations such as inverting, non-inverting, differential amplifiers, integrators, and more, depending on how the external resistors and capacitor s are connected to the device.
Pin Functionality FAQ
Here is a FAQ on the LM358D pinout, which will clarify common questions regarding the functionality of each pin.
What is the function of Pin 1 (Output of Op-Amp 1)? Pin 1 is the output pin for the first operational amplifier (Op-Amp 1) in the LM358D. It provides the amplified version of the input signal from the inverting or non-inverting input. What does the Inverting Input of Op-Amp 1 (Pin 2) do? Pin 2 is the inverting input for the first operational amplifier (Op-Amp 1). It is used when creating an inverting amplifier circuit. How is the Non-Inverting Input of Op-Amp 1 (Pin 3) used? Pin 3 is the non-inverting input for Op-Amp 1. It is used for non-inverting amplifier configurations, where the input signal is applied to this pin. What is the significance of Pin 4 (V-)? Pin 4 is the negative power supply pin for the LM358D. It is typically connected to ground or the negative side of a dual power supply system. What is the purpose of Pin 5 (Non-Inverting Input of Op-Amp 2)? Pin 5 serves as the non-inverting input for the second operational amplifier (Op-Amp 2) in the LM358D. What is the role of Pin 6 (Inverting Input of Op-Amp 2)? Pin 6 is the inverting input for the second operational amplifier (Op-Amp 2), used when setting up an inverting amplifier configuration for Op-Amp 2. What is the function of Pin 7 (Output of Op-Amp 2)? Pin 7 is the output pin for the second operational amplifier (Op-Amp 2) in the LM358D. It outputs the amplified signal based on the configuration of the inputs. What is Pin 8 (V+) used for? Pin 8 is the positive power supply pin. It should be connected to a positive voltage supply (e.g., +5V, +12V, etc.). Can the LM358D be used with a single power supply? Yes, the LM358D can be powered with a single supply voltage, provided that Pin 4 is connected to ground and Pin 8 is connected to a positive voltage. What is the maximum supply voltage for the LM358D? The LM358D typically operates with a supply voltage between 3V and 32V, or ±1.5V to ±16V for dual supply configurations. How do I configure the LM358D as an inverting amplifier? To configure the LM358D as an inverting amplifier, connect the input signal to the inverting input of Op-Amp 1 (Pin 2) and use a feedback resistor from the output (Pin 1) to the inverting input (Pin 2). How do I configure the LM358D as a non-inverting amplifier? For a non-inverting amplifier configuration, connect the input signal to the non-inverting input (Pin 3), and use a feedback resistor from the output (Pin 1) to the inverting input (Pin 2). What is the input impedance of the LM358D? The input impedance of the LM358D is typically very high, often in the range of MΩ (Megaohms), making it suitable for signal amplification with minimal loading. What is the output impedance of the LM358D? The output impedance is typically low, making it suitable for driving loads such as ADCs, other amplifiers, or sensors. What is the output voltage range of the LM358D? The output voltage range of the LM358D is typically from 0V (or close to ground) up to (V+ - 2V), depending on the supply voltage and load conditions. How do I use the LM358D for signal buffering? To use the LM358D for buffering, configure it as a voltage follower by connecting the output (Pin 1) directly to the inverting input (Pin 2), and applying the input signal to the non-inverting input (Pin 3). Can I use the LM358D in a comparator configuration? Yes, the LM358D can be used as a comparator, although it is not an ideal choice for high-speed applications. It can compare two signals and provide a logic-level output. What is the Slew Rate of the LM358D? The slew rate for the LM358D is typically 0.3V/µs, which means it can change its output voltage by 0.3V per microsecond. Can I use the LM358D for audio amplification? Yes, the LM358D can be used for low-power audio applications, though it is not the best choice for high-fidelity audio amplification due to its limited slew rate and bandwidth. What happens if I exceed the supply voltage ratings for the LM358D? Exceeding the supply voltage ratings can damage the LM358D, leading to permanent failure of the internal circuitry, resulting in non-functioning behavior.This detailed explanation of the LM358D’s pin functions, packaging, and frequently asked questions provides an in-depth overview of this op-amp, ensuring proper usage and understanding of the component in various circuit designs.
