LF353D

Overview

The LF353D is a dual wideband JFET-input operational amplifier manufactured by onsemi. It integrates two internally compensated amplifiers on a single monolithic IC, combining high-voltage JFET input devices with bipolar transistors. Key electrical parameters include a maximum input offset voltage of 5.0 mV, a typical low input bias current of 50 pA, and a low input noise voltage of 16 nV/√Hz. The device offers a wide gain bandwidth of 4.0 MHz and a high slew rate of 13 V/µs while maintaining a low supply current of 1.8 mA per amplifier. It features high input impedance of 10^12 Ω and high common-mode and supply voltage rejection ratios of 100 dB.

Feature Summary

• Combines state-of-the-art analog technologies on a single monolithic integrated circuit for cost-effective performance.
• Features well-matched high-voltage JFET input devices to ensure low input offset voltage and temperature coefficient.
• Provides internal frequency compensation, eliminating the need for external components in standard configurations.
• Delivers wide bandwidths and fast slew rates characteristic of JFET technology alongside low power consumption.

Applications

• High-speed integrator circuits
• Sample-and-hold applications
• Precision instrumentation systems

Procurement Notes

Verify the manufacturer designation on the component marking, as the LF353 part number is produced by multiple vendors including Texas Instruments and STMicroelectronics. Confirm that the specific LF353D variant matches the required pinout and electrical tolerances defined in the onsemi datasheet. Ensure compatibility with existing PCB footprints designed for industry-standard operational amplifier packages.

Selection Notes

Select this component when a dual-channel solution with JFET input characteristics is required for low-noise and high-impedance applications. It serves as a pin-compatible alternative to industry-standard MC1741, MC1458, and MC3403/LM324 bipolar devices. Consider its 4.0 MHz gain bandwidth and 13 V/µs slew rate for signal processing tasks requiring faster response times than standard general-purpose op-amps.

Part Context

The LF353D belongs to a family of JFET operational amplifiers known for their high input impedance and low bias currents. This dual-channel configuration allows for compact designs in analog signal processing. The device is widely recognized for its ability to replace older bipolar operational amplifiers while offering improved speed and noise performance in similar package formats.

Replacement Considerations

Pin-compatible substitutes include the LF353DE4 from Texas Instruments and the LF353D from STMicroelectronics. Verify that replacement parts meet the same electrical specifications regarding offset voltage, bias current, and bandwidth to ensure circuit functionality remains unchanged.