Motorola LM358N Dual Low Power Operational Amplifiers Y19691

LM358N Dual Low Power Operational Amplifier

Overview

The LM358N is a versatile dual low-power operational amplifier designed for a wide range of applications. It features two independent, high-gain, internally frequency-compensated op-amps in a single package, making it ideal for both single and dual supply operations.

Key Features

• Dual Op-Amps: Two independent op-amps in one package.
• Wide Supply Voltage Range: Operates from 3V to 32V (single supply) or ±1.5V to ±16V (dual supply).
• Low Power Consumption: Typical supply current of 0.7 mA per amplifier.
• Common Mode Input Voltage Range: Extends to the negative supply (ground).
• Output Voltage Range: Includes ground in single supply operation.
• Low Input Bias Current: Typically 45 nA.
• Internally Compensated: For frequency response.
• Short Circuit Protection: Outputs are protected against short circuits.
• Temperature Range: Operates over a wide temperature range.

Typical Applications

• Signal Amplification: Amplify weak signals from sensors or other sources.
• Active Filters: Design low-pass, high-pass, or band-pass filters for signal conditioning.
• Voltage Follower (Buffer): Isolate stages in a circuit.
• Comparators: Compare two voltage levels.
• Oscillators: Generate waveforms like square waves or sawtooth waves.
• Battery Level Indicator: Monitor battery voltage levels and indicate charge status.
• Motion Sensor Light: Create a motion-activated light switch.
• Microphone Amplifier: Amplify signals from a condenser microphone.
• LED Flasher Circuit: Make LEDs blink at adjustable rates.
• Water Level Indicator: Detect and indicate different water levels.

Science and Technology Behind LM358N

The LM358N operational amplifier integrates several advanced technological principles:

• Dual Op-Amp Design: Combines two op-amps in a single package for compact and efficient circuit layouts.
• Wide Supply Voltage Range: Operates across a broad range of voltages, achieved through careful biasing and circuit design.
• Rail-to-Rail Input: Accepts input signals down to the negative supply rail, using PNP transistors in the input stage.
• Low Power Consumption: Efficient design with a typical supply current of only 0.7 mA per amplifier.
• Internal Frequency Compensation: Adds capacitance within the chip to stabilize the op-amp and prevent oscillations.
• Single Supply Operation: Eliminates the need for dual power supplies, using clever biasing techniques and output stage design.
• Temperature Compensation: Maintains consistent performance across various temperatures through advanced design techniques.