This document introduces low-cost JFET input operational amplifiers that combine two state-of-the-art analog technologies. Each internally compensated operational amplifier has well-matched high-voltage JFET input devices for low input offset voltage. The JFET technology provides wide bandwidths and fast slew rates with low input bias currents, input offset currents, and supply currents. These devices are available in single, dual, and quad operational amplifiers that are pin-compatible with the industry standard MC1741, MC1458, and the MC3403/LM324 bipolar devices.
The LF347, LF351 and LF353 are a family of JFET‑input operational amplifiers offered by Motorola in single, dual and quad configurations. They are supplied in standard plastic packages (SO‑8, DIP) and are pin‑compatible with legacy bipolar op‑amps such as the MC1741, MC1458 and LM324 series.
The document provides detailed electrical characteristics, maximum ratings, and mechanical dimensions. Key parameters include low input bias current, high input impedance, wide gain‑bandwidth, and robust supply voltage ranges, making these devices suitable for precision analog applications. This manual is written in Chinese.
| Input Offset Voltage | 5.0 mV (max) |
|---|---|
| Input Bias Current | 50 pA |
| Supply Voltage | +18 V / –18 V |
| Gain Bandwidth Product | 4.0 MHz |
| Slew Rate | 13 V/µs |
| Supply Current | 1.8 mA per amplifier |
| Input Resistance | 10^12 Ω |
| Common‑Mode Rejection Ratio | 100 dB |
The devices are rated for VCC +18 V and VEE –18 V.
The LF347B has a maximum input offset voltage of 5.0 mV.
Typical input bias current is 50 pA.
The amplifiers operate from 0 °C to +70 °C.