LM258DR Detailed explanation of pin function specifications and circuit principle instructions

The "LM258DR" is a model number for a dual operational amplifier (op-amp) manufactured by Texas Instruments. It comes in a SO-8 package type (Small Outline 8-lead package). Let’s go into a detailed explanation of the pin functions, package specifications, and a FAQ section based on your request.

1. Package Type

The LM258DR is in a SO-8 (Small Outline) package. This package typically contains 8 pins (not 200). Therefore, I will explain the functions of each of the 8 pins.

2. Pin Function Specification

Here is the detailed explanation of the pin function specifications for the LM258DR (SO-8) package. This op-amp consists of 2 independent, high-gain, internally compensated operational amplifiers. Below are the pin configurations and their functions:

Pin # Pin Name Pin Function Description 1 Output (A) Output of the first op-amp (op-amp A). This is where the amplified signal appears. 2 Inverting Input (A) Inverting input for the first op-amp (op-amp A). This pin receives the negative input signal for inverting the output. 3 Non-Inverting Input (A) Non-inverting input for the first op-amp (op-amp A). This pin receives the positive input signal. 4 V- (Negative Supply) Negative power supply pin. This pin is connected to the negative supply voltage of the op-amp circuit. 5 Non-Inverting Input (B) Non-inverting input for the second op-amp (op-amp B). This pin receives the positive input signal for op-amp B. 6 Inverting Input (B) Inverting input for the second op-amp (op-amp B). This pin receives the negative input signal for op-amp B. 7 Output (B) Output of the second op-amp (op-amp B). The amplified signal from op-amp B will appear here. 8 V+ (Positive Supply) Positive power supply pin. This pin is connected to the positive supply voltage of the op-amp circuit.

3. Detailed Description of Pin Functions

Let’s look at the function of each pin in more detail:

Pin 1: Output (A) This is the output pin of the first op-amp (op-amp A). The voltage at this pin is determined by the input signals at pins 2 (inverting) and 3 (non-inverting), as well as the resistor network around the op-amp.

Pin 2: Inverting Input (A) This is the inverting input of the first op-amp. The inverting input receives the signal that will be amplified with an inverted phase.

Pin 3: Non-Inverting Input (A) This is the non-inverting input of the first op-amp. The signal applied here will appear at the output in the same phase (non-inverted).

Pin 4: V- (Negative Supply) This pin is connected to the negative power supply voltage. The op-amp requires a dual supply voltage, and this pin connects to the negative side.

Pin 5: Non-Inverting Input (B) This is the non-inverting input for the second op-amp (op-amp B). Similar to Pin 3, signals applied here will appear at the output in a non-inverted phase.

Pin 6: Inverting Input (B) This is the inverting input for the second op-amp (op-amp B). Signals at this pin will be amplified with an inverted phase, as is typical with inverting op-amp configurations.

Pin 7: Output (B) This pin provides the output of the second op-amp (op-amp B). The signal here is based on the inputs at pins 6 and 5 and the surrounding components in the op-amp circuit.

Pin 8: V+ (Positive Supply) This pin connects to the positive power supply voltage. Op-amps require both a positive and negative supply, and this pin connects to the positive side.

4. FAQ - Frequently Asked Questions

Here’s a list of 20 common questions about the LM258DR op-amp:

What is the LM258DR? The LM258DR is a dual operational amplifier (op-amp) integrated circuit (IC) with two independent op-amps in a SO-8 package. What is the typical application of the LM258DR? The LM258DR is used in various analog signal processing applications such as amplification, filtering, and buffering. What is the supply voltage range for the LM258DR? The LM258DR operates with a supply voltage range from 3V to 32V (single supply) or ±1.5V to ±16V (dual supply). Can I use the LM258DR with a single power supply? Yes, the LM258DR can be used with a single power supply, provided that the input voltage does not exceed the supply voltage levels. What is the maximum output swing of the LM258DR? The output swing is typically between V- + 1V and V+ - 1V, depending on the load and supply voltage. What is the gain bandwidth product of the LM258DR? The LM258DR has a gain-bandwidth product of 1 MHz. What is the quiescent current of the LM258DR? The quiescent current of the LM258DR is typically 300 µA per amplifier. What is the input bias current of the LM258DR? The input bias current is typically 100 nA at 25°C. Can the LM258DR be used in a high-speed application? The LM258DR is not suitable for high-speed applications as it is a general-purpose op-amp with a low gain-bandwidth product. What is the input offset voltage of the LM258DR? The input offset voltage is typically 2 mV. What are the key features of the LM258DR? The LM258DR features low offset voltage, low power consumption, wide supply voltage range, and high input impedance. What is the typical output impedance of the LM258DR? The output impedance of the LM258DR is typically 50Ω. How can I use the LM258DR as a voltage follower? To use the LM258DR as a voltage follower, connect the non-inverting input to the input signal and the output to the inverting input. What is the slew rate of the LM258DR? The slew rate of the LM258DR is 0.3 V/µs. What is the power consumption of the LM258DR? The power consumption is typically very low, about 1 mW at typical operating conditions. Can the LM258DR be used for audio amplification? Yes, the LM258DR is suitable for low-power audio amplification applications. What is the thermal shutdown feature of the LM258DR? The LM258DR does not have thermal shutdown protection built into the IC. What is the input voltage range for the LM258DR? The input voltage range is typically between V- + 2V and V+ - 2V, depending on the supply voltage. How do I calculate the gain of the LM258DR? The gain can be set using external resistors in a feedback configuration according to the standard op-amp gain formulas. What is the recommended operating temperature range for the LM258DR? The recommended operating temperature range is 0°C to 70°C.

Conclusion

The LM258DR is a dual operational amplifier suitable for various general-purpose analog applications. This package comes with 8 pins, and each pin has a specific function detailed above. The LM258DR has low power consumption and offers great performance for most analog processing circuits.

Let me know if you need more details or have other questions!