LF353N

Overview

The LF353N is a dual wideband operational amplifier manufactured by onsemi, featuring JFET inputs and internal offset voltage trimming. It provides a gain-bandwidth product of 4 MHz and a slew rate of 13 V/us. The device operates within a supply voltage range of ±18 V to -18 V, with a typical quiescent current of 6.5 mA. Key electrical specifications include an input offset voltage of 10 mV, input bias current of 200 pA, common-mode rejection ratio of 70 dB, and input voltage noise density of 16 nV/sqrt Hz. It is housed in an 8-pin DIP package.

Feature Summary

• Dual-channel architecture with JFET input stage for high impedance
• Internal adjustment of input offset voltage for precision
• Wide bandwidth and fast slew rate capabilities
• Low input bias and offset currents

Applications

• High-speed integrators
• Fast digital-to-analog converters
• Sample-and-hold circuits
• Signal processing systems

Procurement Notes

Verify the specific manufacturer source, as the LF353N designation appears in listings for both onsemi and Texas Instruments. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability may vary significantly between suppliers. Ensure the package type matches the required DIP-8 form factor for through-hole mounting.

Selection Notes

Select this component when upgrading from standard bipolar op-amps like the LM358 to achieve higher speed and lower input bias currents without changing pin configurations. Consider the 4 MHz bandwidth limit for high-frequency applications. Verify that the ±18 V maximum supply rating aligns with the system power rails and that the DIP-8 package fits the PCB layout constraints.

Part Context

The LF353 belongs to a family of wideband dual JFET input operational amplifiers known for their compatibility with standard LM1558 and LM358 designs. This allows for direct pin-for-pin upgrades in existing circuits to improve performance metrics such as slew rate and input impedance while maintaining similar physical footprint requirements.

Replacement Considerations

LF353N/NOPB (Texas Instruments) offers equivalent functionality with potential variations in manufacturing origin.