Overview
The LM358N is a dual operational amplifier produced by Fairchild Semiconductor. It integrates two independent, high-gain operational amplifiers that are internally frequency-compensated, allowing them to operate efficiently across a broad range of single power supply voltages. This versatility makes the LM358N suitable for a variety of applications, including transducer amplifiers, DC gain blocks, and conventional op-amp circuits. The component is particularly valued for its ability to operate from a single power supply, eliminating the need for dual power supplies and making it compatible with standard logic system voltages such as +5 V.
Key Specifications
| Parameter | LM358N |
|---|---|
| Type | Dual Operational Amplifier |
| Number of Amplifiers | 2 |
| Frequency Compensation | Internal |
| DC Voltage Gain | ~100 dB |
| Unity-Gain Bandwidth | ~1.1 MHz (temperature compensated) |
| Supply Voltage Range | 3V to 32V (single supply); ±1.5V to ±16V (dual supplies) |
| Slew Rate | 0.3 V/μs |
| Power Consumption | Low (500 µA), practically independent of supply voltage |
| Input Bias Current | Low (20 nA, temperature compensated) |
| Input Offset Voltage | Low (2 mV) |
| Input Offset Current | Low (2 nA) |
| Input Common-Mode Voltage Range | Covers negative rails |
| Differential Input Voltage Range | Matches the power supply voltage |
| Output Voltage Swing | 0 V to (VCC+ -1.5 V) |
Key Features
- Internally pre-compensated for frequency response
- High DC voltage gain of approximately 100 dB
- Wide bandwidth (unity gain) of approximately 1.1 MHz (temperature compensated)
- Low supply current per operator, practically unaffected by supply voltage
- Low input bias current and input offset voltage
- Extensive power supply range: 3V to 32V (single supply); ±1.5V to ±16V (dual supplies)
- Input common-mode voltage range includes ground
- Substantial output voltage swing from 0 V to (VCC+ -1.5 V)
- Compatible with various logic types and suitable for battery-operated applications
Applications
- Transducer amplifiers
- DC gain blocks
- Conventional op-amp circuits
- Integrators and differentiators
- Summer circuits and adder configurations
- Voltage follower setups
- Digital multimeters and oscilloscopes
- Power amplifiers, LED drivers, and voltage-controlled oscillators (VCOs)
- AC and DC coupled active filters
Q & A
- What is the LM358N?
The LM358N is a dual operational amplifier produced by Fairchild Semiconductor, featuring two independent, high-gain op-amps with internal frequency compensation.
- What is the supply voltage range for the LM358N?
The LM358N can operate from a single power supply of 3V to 32V or from dual supplies of ±1.5V to ±16V.
- What are the key applications of the LM358N?
The LM358N is used in transducer amplifiers, DC gain blocks, conventional op-amp circuits, integrators, differentiators, summer circuits, and various other analog signal processing applications.
- What are the advantages of using the LM358N?
The LM358N eliminates the need for dual power supplies, allows direct sensing near ground, and is compatible with various logic types. It also has low power consumption, making it suitable for battery-operated devices.
- What is the input bias current of the LM358N?
The input bias current of the LM358N is approximately 20 nA, which is temperature compensated.
- What is the output voltage swing of the LM358N?
The output voltage of the LM358N can swing from 0 V to (VCC+ -1.5 V).
- Is the LM358N suitable for battery-operated devices?
- Can the LM358N operate with a single power supply?
- What are some equivalent components to the LM358N?
The LM358N is part of the LM358 series and is equivalent to components like LM158, LM258, LM2904, and LM2409, although they may have slight differences in thermal properties.
- How does the LM358N perform in mixed-signal circuits?
The LM358N is efficient in mixed-signal circuits due to its ability to directly sense ground and its compatibility with various logic types, ensuring signal integrity.
