LF347MX

Overview

The LF347MX is a quad JFET-input operational amplifier manufactured by Texas Instruments. It features a gain-bandwidth product of 4 MHz and a slew rate of 13 V/us. The device operates on supply voltages ranging from 8 V to 36 V, with a maximum dual supply of 18 V. Input offset voltage is typically 10 mV, and input bias current is 200 pA. Common-mode rejection ratio reaches 100 dB, while power supply rejection ratio is 70 dB. Operating supply current is 7.2 mA per channel, with an output current capability of 31 mA. The component is housed in an SOIC-14 surface-mount package.

Feature Summary

• Quad JFET input architecture providing high-speed performance
• Wide bandwidth and fast slew rate for signal processing
• High common-mode rejection ratio for noise immunity

Applications

• Audio preamplifier circuits
• Active filter designs
• Voltage follower buffers

Procurement Notes

Verify the specific suffix MX against the manufacturer's official datasheet to confirm the SOIC-14 package type and tape-and-reel packaging format. Ensure the part number matches the exact electrical specifications required for the design, as variations may exist within the LF347 family. Cross-reference the ordering information directly with Texas Instruments documentation to avoid discrepancies in pinout or thermal characteristics.

Selection Notes

Select this component when a quad amplifier with JFET inputs is required for applications demanding low input bias current and moderate speed. The 4 MHz bandwidth suits general-purpose analog signal conditioning. Compare against other LF347 variants to ensure the surface-mount package aligns with PCB layout constraints. Verify that the 36 V maximum supply voltage meets the system power requirements.

Part Context

The LF347MX belongs to the LF347 series of wide bandwidth quad operational amplifiers. This series utilizes JFET input stages to achieve high input impedance and low noise characteristics. The device is designed for general-purpose analog applications requiring multiple amplifier channels in a single package. It represents a standard solution for multi-channel signal processing tasks in industrial and consumer electronics.

Replacement Considerations

Official substitutes include LF347M/NOPB and LF347MX/NOPB, which maintain identical electrical characteristics and pinouts. These alternatives offer lead-free compliance while preserving the original performance metrics.