LF444CM/NOPB

Overview

The LF444CM/NOPB is a quad low-power JFET input operational amplifier manufactured by Texas Instruments. It features four independent high-gain amplifiers with internal frequency compensation, allowing operation from single or split power supplies. Key electrical parameters include a gain-bandwidth product of 1 MHz, a slew rate of 1 V/µs, and an input bias current of 50 pA. The device operates within a supply voltage range of 6 V to 36 V, drawing 600 µA of quiescent current per amplifier. It is housed in a 14-pin SOIC package and supports an operating temperature range from 0°C to +70°C.

Feature Summary

• Quad configuration with internal frequency compensation for stability without external components
• JFET input stage providing very low input bias current and noise
• Low power consumption suitable for battery-operated applications
• Single-supply operation capability with input common-mode range including ground

Applications

• Sensor signal conditioning and amplification
• DC gain blocks in instrumentation circuits
• Active filters and integrators
• Transimpedance amplifiers for photodiode interfaces

Procurement Notes

Verify the specific suffix 'CM' against the manufacturer's latest datasheet to confirm the commercial temperature grade (0°C to +70°C) and SOIC-14 packaging. Ensure compatibility with existing PCB footprints and thermal management requirements for surface-mount assembly. Cross-reference the NOPB designation to confirm lead-free and RoHS compliance status as defined by Texas Instruments standards.

Selection Notes

Select this component when low input bias current and moderate bandwidth are required for precision analog signal processing. It serves as a direct pin-compatible alternative to standard JFET op-amps like the TL084 series. Consider the trade-off between its 1 MHz bandwidth and lower power consumption compared to higher-speed bipolar alternatives. Verify that the single-supply rail-to-ground input capability meets the system's signal swing requirements.

Part Context

The LF444 series belongs to Texas Instruments' family of low-power JFET input operational amplifiers. This quad variant integrates four identical amplifiers into a single package, reducing board space compared to discrete solutions. The CM/NOPB designation indicates a commercial temperature range device in a lead-free SOIC package, aligning with modern environmental regulations while maintaining performance for general-purpose analog applications.

Replacement Considerations

The LF444CMX/NOPB is a tape-and-reel version of the same die and specifications, offering interchangeability based on packaging preference. Other quad JFET op-amps may require circuit adjustments due to differences in input offset voltage or slew rate.