onsemi Tariff Inquiry

LF353D

LF353D Description

The LF353D from onsemi is a dual JFET-input operational amplifier (op-amp) housed in an 8-SOIC package, designed for precision analog applications. With a wide supply voltage range (7V to 36V) and low input bias current (50 pA), this IC excels in high-impedance signal conditioning. Its 3 MHz gain bandwidth product (GBW) and 13V/µs slew rate ensure fast signal processing, while the JFET input stage minimizes noise and distortion. Though marked obsolete, it remains a reliable choice for legacy designs requiring stable performance in 0°C to 70°C environments.

LF353D Features

• Dual-channel design: Two independent op-amps in one package, reducing board space.
• Low power consumption: 3.6mA per channel supply current, ideal for battery-operated systems.
• High output drive: 40mA output current per channel for robust signal buffering.
• Low input offset voltage (5 mV): Enhances accuracy in DC-coupled applications.
• Surface-mount (SOIC) packaging: Facilitates compact PCB layouts.
• JFET inputs: Deliver ultra-high input impedance (>10¹²Ω), critical for sensor interfaces and audio preamps.

LF353D Applications

The LF353D is particularly suited for:

• Active filters and signal conditioning in test equipment, leveraging its GBW and slew rate.
• Photodiode/transimpedance amplifiers, where low input bias current minimizes error.
• Audio preamplifiers due to JFETs’ low noise and high impedance.
• Voltage followers/buffers in industrial control systems, benefiting from its high output drive.
• Legacy system maintenance, where drop-in compatibility is essential.

Conclusion of LF353D

While obsolete, the LF353D remains a versatile op-amp for precision analog designs requiring JFET inputs, wide voltage range, and low noise. Its balance of speed, accuracy, and power efficiency makes it a historical standout for high-Z signal chains, audio, and instrumentation. Engineers maintaining older systems or seeking cost-effective alternatives for non-critical applications may still find value in this IC.