LF442AMH/NOPB

Overview

The LF442AMH/NOPB is a dual low power JFET input operational amplifier manufactured by Texas Instruments. It features a maximum supply current of 400 μA, an input bias current of 50 pA (max), and an input offset voltage of 1 mV (max). The device provides a gain-bandwidth product of 1 MHz and a slew rate of 1 V/μs. It operates within a supply voltage range of ±5 V to ±18 V and supports military temperature ranges from -55°C to +125°C in the TO-99 package.

Feature Summary

• JFET input stage providing high input impedance and low noise characteristics
• Internally trimmed for low input offset voltage and drift
• Pin-compatible with LM1458 for direct power reduction upgrades

Applications

• High speed integrators
• Fast D/A converters
• Sample and hold circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to confirm package type and temperature grade. Ensure the procurement channel sources components directly from authorized distributors or the manufacturer to guarantee authenticity and traceability. Confirm RoHS compliance status matches project requirements before finalizing orders.

Selection Notes

Select this component when low power dissipation and good electrical characteristics are primary design considerations. It serves as a drop-in replacement for the LM1458, offering significantly improved DC performance while maintaining similar AC characteristics. Suitable for applications requiring high input impedance and low noise in a low power environment.

Part Context

This part belongs to the LF442-MIL family of dual low power operational amplifiers. It utilizes BiFET II technology to combine the benefits of JFET inputs with low power consumption. The device is designed to replace standard bipolar op-amps like the LM1458, providing a tenfold reduction in supply current without sacrificing bandwidth or slew rate performance.

Replacement Considerations

The LF442-MIL is pin-compatible with the LM1458. Verify that the existing circuit can accommodate the lower supply current and different input bias characteristics. Ensure the negative common-mode voltage limits are respected in the application design.

FAQ

Is the LF442AMH/NOPB pin-compatible with the LM1458?

Yes, the LF442-MIL is pin-compatible with the LM1458, allowing for immediate power reduction in many applications.

What is the typical input bias current for this device?

The input bias current is typically 10 pA at 25°C and can reach up to 100 pA maximum under specified conditions.