LF253DT

Overview

The LF253DT is a dual wideband JFET operational amplifier manufactured by STMicroelectronics. It features two independent circuits in an 8-SOIC package. Key electrical parameters include a gain-bandwidth product of 4 MHz and a slew rate of 16 V/µs. The input bias current is specified at 20 pA, with an input offset voltage of 3 mV. Input voltage noise density is 15 nV/√Hz. Supply voltage ranges from 6 V to 36 V, with a maximum operating supply of 18 V in some contexts. Operating supply current is 1.4 mA per channel (2.8 mA total). Output current per channel is 40 mA. Common-mode rejection ratio is 70 dB. The device operates within a temperature range of -40°C to 105°C.

Feature Summary

• High slew rate of 16 V/µs for fast signal response
• Low input bias and offset currents due to JFET input stage
• Wide common-mode and differential voltage range
• Internal frequency compensation for stability

Applications

• High-speed analog signal processing
• Precision instrumentation circuits
• Active filter designs requiring low noise

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to ensure correct packaging and tape-and-reel specifications. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Cross-reference the 8-SOIC pinout with your PCB footprint design to prevent installation errors. Ensure supply voltage limits are respected during circuit simulation.

Selection Notes

Select this component when high input impedance and low bias current are critical alongside moderate bandwidth requirements. The JFET input stage offers superior noise performance compared to bipolar alternatives. Consider the 8-SOIC package constraints for thermal management and board space. Evaluate the 4 MHz gain-bandwidth product against system signal frequencies to ensure adequate phase margin and stability.

Part Context

The LF253DT belongs to the LF253 family of dual operational amplifiers. It shares architectural similarities with the LF353 but may differ in specific electrical characteristics or manufacturing revisions. This series is designed for general-purpose high-speed applications utilizing JFET technology. The device integrates well-matched JFET and bipolar transistors on a single monolithic chip.

Replacement Considerations

Public confirmed substitute part numbers are not explicitly listed in the provided source material. Verify compatibility with generic JFET op-amps like the TL072 only if electrical parameters match exactly.