LF353N

Overview

The LF353N is a dual wideband high-speed JFET input operational amplifier manufactured by Texas Instruments. It features internally trimmed input offset voltage utilizing BI-FET II technology, ensuring low power consumption while maintaining high gain-bandwidth product and fast slew rate. The device incorporates matched high-voltage JFET input devices to provide very low input bias and offset currents. It operates within a supply voltage range of 10V to 36V (single) or ±5V to ±18V (dual). Key electrical parameters include a 4 MHz gain-bandwidth product, 13 V/µs slew rate, 5 mV maximum input offset voltage, and 50 pA typical input bias current.

Feature Summary

• JFET input stage providing extremely low input bias current and high input impedance
• Internally trimmed input offset voltage for improved accuracy without external adjustment
• Wide bandwidth and fast slew rate suitable for high-speed signal processing applications

Applications

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

Procurement Notes

Verify the manufacturer designation on the component marking, as the LF353 part number has been produced by multiple vendors including National Semiconductor and Texas Instruments. Confirm that the specific unit corresponds to the TI datasheet specifications regarding pinout and electrical characteristics before integration into the design.

Selection Notes

Select this component when designing circuits requiring high input impedance combined with moderate speed performance. It serves as a direct upgrade path for designs previously using LM1558 or LM358 amplifiers, offering superior input characteristics while maintaining pin compatibility. Ensure the application does not require rail-to-rail output swing capabilities.

Part Context

This device belongs to the LF353 family of dual operational amplifiers. It is functionally compatible with standard LM1558 and LM358 designs, allowing for immediate performance upgrades in existing schematics. The DIP-8 package facilitates through-hole mounting on standard printed circuit boards.

Replacement Considerations

LF353N/NOPB

FAQ

Is the LF353N rail-to-rail?

No, the LF353N is not a rail-to-rail input or output operational amplifier.

What technology is used for the input stage?

The LF353N utilizes BI-FET II technology, which employs high-voltage JFET input devices.