LF442ACN

Overview

The LF442ACN is a dual low-power JFET input operational amplifier manufactured by Texas Instruments. It features a BI-FET II architecture, providing high-speed performance with low power consumption. The device operates within a supply voltage range of 4V to 44V and supports an operating temperature range of 0°C to 70°C. Key electrical characteristics include a gain-bandwidth product of 1 MHz, a slew rate of 1 V/µs, and an input bias current of 10 pA. It is housed in an 8-pin PDIP package.

Feature Summary

• Dual JFET input stage for low noise and high input impedance
• BI-FET II technology ensures high speed and low power operation
• Wide single or split supply voltage capability

Applications

• Precision analog signal processing circuits
• Active filter designs requiring low input bias current
• Integrators and differentiators in data acquisition systems

Procurement Notes

Verify component status as the LF442ACN is listed as obsolete and no longer in production. Confirm availability through authorized distributors or secondary markets. Ensure replacement components meet equivalent electrical specifications such as pinout compatibility and performance metrics before integration into new designs.

Selection Notes

Select this component for applications requiring high input impedance and low bias current typical of JFET inputs. Consider the 1 MHz bandwidth and 1 V/µs slew rate for moderate-speed signal conditioning tasks. Evaluate alternative active devices if higher precision or wider temperature ranges are required for the specific application environment.

Part Context

The LF442ACN belongs to the LF44x series of dual operational amplifiers from Texas Instruments. This series utilizes BI-FET II technology to combine the benefits of JFET inputs with bipolar output stages. It is part of a broader family of general-purpose op-amps designed for cost-effective and reliable analog circuit implementations.

Replacement Considerations

The OPA2137PA is identified as a similar available substitute. Verify that the replacement meets all original design requirements regarding pin configuration, supply voltage limits, and electrical performance parameters.