LM258DT Detailed explanation of pin function specifications and circuit principle instructions

The "LM258DT" is a dual operational amplifier (op-amp) IC manufactured by Texas Instruments. It belongs to the LM258 series which includes low- Power , dual op-amps.

Package Type:

The LM258DT typically comes in the DIP-8 (Dual In-line Package, 8 pins) or SOIC-8 (Small Outline Integrated Circuit, 8 pins) packages. The exact package type can depend on the manufacturer's offer, but "DT" generally refers to a DIP-8 package.

Detailed Pin Function Specification for LM258DT (DIP-8)

Pin Number Pin Name Pin Function 1 Output A Output of Operational Amplifier A (non-inverting) 2 Inverting Input A Inverting Input of Operational Amplifier A 3 Non-Inverting Input A Non-Inverting Input of Operational Amplifier A 4 V- (Negative Power Supply) Negative Power Supply Connection (Ground) 5 Non-Inverting Input B Non-Inverting Input of Operational Amplifier B 6 Inverting Input B Inverting Input of Operational Amplifier B 7 Output B Output of Operational Amplifier B (non-inverting) 8 V+ (Positive Power Supply) Positive Power Supply Connection

Circuit Principle Instruction

LM258DT is a dual operational amplifier, meaning it contains two independent op-amps in a single package. It is designed to operate with a dual supply voltage (typically ±15V), but it can also be powered with a single supply (e.g., +5V and ground). The op-amp provides high input impedance and low output impedance, making it suitable for use in amplifying weak signals. The two op-amps in the IC can operate independently or together in differential or summing amplifiers, integrators, and other configurations.

Pinout Diagram

Below is a representation of the pinout for LM258DT:

+-----------------+ | 8 7 6 5 | | 1 2 3 4 | +-----------------+ Pins 1-3: Inputs and output for Operational Amplifier A Pins 5-7: Inputs and output for Operational Amplifier B Pins 4 and 8: Power supply connections

FAQs (20 Common Questions) with Answers

What is the operating voltage range for LM258DT? The LM258DT operates from a single power supply of 3V to 32V, or a dual supply of ±1.5V to ±16V. Can LM258DT work with a single supply voltage? Yes, the LM258DT can be used with a single supply voltage, such as 5V or 12V. What is the output voltage swing range for LM258DT? The output voltage swing is typically from V- + 1V to V+ - 1V, depending on load conditions. How much current can the LM258DT source or sink? The LM258DT can typically source or sink up to 20mA per output. Can LM258DT be used in high-speed applications? No, the LM258DT is designed for low-speed applications, with a slew rate of 0.3V/µs. What is the input bias current for LM258DT? The input bias current is typically 200nA at room temperature. What is the input offset voltage of the LM258DT? The input offset voltage is typically 2mV. What is the typical open-loop gain of LM258DT? The typical open-loop gain is 100,000. How do I use LM258DT in a differential amplifier configuration? Connect the non-inverting input of one op-amp to the signal input, and the inverting input to the feedback network that includes a resistor from the output to the inverting input.

Can LM258DT be used in active filters ?

Yes, the LM258DT can be used in active filter circuits such as low-pass or high-pass filters.

What is the power consumption of LM258DT?

The power consumption is very low, typically around 300µA per amplifier.

What is the temperature range for LM258DT?

The LM258DT operates within a temperature range of -40°C to +85°C.

What kind of applications can I use LM258DT for?

It can be used for audio amplification, signal conditioning, active filters, voltage followers, and other low-speed analog processing applications.

Can LM258DT be used in sensor signal amplification?

Yes, it is commonly used for amplifying low-level signals from sensors.

What is the gain-bandwidth product for LM258DT?

The gain-bandwidth product is approximately 1 MHz.

What are the typical uses of LM258DT in consumer electronics?

The LM258DT is used in audio amplifiers, signal processing circuits, and other analog systems where low power consumption is essential.

How do I calculate the feedback resistor values for LM258DT in an amplifier configuration?

Use standard op-amp amplifier formulas to calculate resistor values based on desired gain.

Does LM258DT have any protection diodes at the inputs?

Yes, the LM258DT includes internal diodes to protect the inputs from over-voltage conditions.

What is the typical common-mode rejection ratio (CMRR) for LM258DT?

The CMRR is typically 80dB at a frequency of 1kHz.

How should I connect the power supply pins for LM258DT?

Connect pin 8 (V+) to the positive power supply voltage, and pin 4 (V-) to the negative power supply or ground, depending on your configuration.

I hope this detailed explanation and FAQ section helps! Let me know if you need further information.