STMicroelectronics

LM346N

LM346N Description

The LM346N is a general-purpose operational amplifier (op-amp) designed by STMicroelectronics. It features a wide supply voltage range, from a minimum of 3 V to a maximum of 44 V, making it suitable for a variety of power supply configurations. This op-amp is housed in a through-hole package, specifically a tube, which facilitates easy integration into various electronic circuits. The LM346N is composed of four independent circuits, each capable of delivering up to 20 mA of output current per channel. It operates within a temperature range of 0°C to 70°C, ensuring reliable performance in typical industrial and commercial environments. Despite being marked as obsolete, the LM346N remains a viable option for applications requiring robust and reliable amplification with a gain bandwidth product of 1.2 MHz and a slew rate of 0.5 V/µs.

LM346N Features

• Wide Supply Voltage Range: The LM346N supports a supply voltage span from 3 V to 44 V, providing flexibility in power supply design.
• High Gain Bandwidth Product: With a gain bandwidth product of 1.2 MHz, the LM346N ensures high-frequency performance suitable for a range of applications.
• Low Input Bias Current: The input bias current is as low as 30 nA, minimizing the impact on the input signal and improving overall circuit stability.
• Low Input Offset Voltage: An input offset voltage of 500 µV ensures accurate signal amplification and minimal distortion.
• High Slew Rate: The 0.5 V/µs slew rate allows for fast response times, making the LM346N suitable for applications requiring rapid signal processing.
• Multiple Circuits: The LM346N includes four independent circuits, providing versatility for multi-channel applications.
• Compliance and Safety: The device is REACH unaffected and RoHS3 compliant, ensuring it meets environmental and safety standards.
• Moisture Sensitivity Level: With an MSL of 1 (Unlimited), the LM346N is suitable for storage and handling in various environmental conditions.

LM346N Applications

The LM346N is ideal for a range of applications due to its robust performance and versatile design. Some specific use cases include:

• Signal Conditioning: The low input bias current and offset voltage make the LM346N suitable for amplifying weak signals in sensor interfaces and analog signal processing.
• Audio Amplification: The high gain bandwidth product and slew rate ensure high-quality audio signal amplification, making it suitable for audio equipment.
• Power Supply Control: The wide supply voltage range and multiple circuits allow for efficient power supply control and regulation in various electronic systems.
• Industrial Automation: The LM346N's operating temperature range and robust performance make it suitable for industrial control systems and automation applications.
• Medical Equipment: The device's compliance with environmental and safety standards makes it suitable for use in medical devices where reliability and accuracy are critical.

Conclusion of LM346N

The LM346N, despite being marked as obsolete, remains a reliable and versatile operational amplifier suitable for a wide range of applications. Its wide supply voltage range, high gain bandwidth product, low input bias current, and low input offset voltage make it an excellent choice for signal conditioning, audio amplification, power supply control, and industrial automation. The device's compliance with environmental and safety standards ensures its suitability for use in various industries, including medical equipment. While newer models may offer additional features, the LM346N's robust performance and versatility continue to make it a valuable component in the electronics industry.