The LF147/LF347 is a low cost, high speed, quad JFET input operational amplifier with an internally trimmed input offset voltage (BI-FET II™ technology). The device requires a low supply current and yet maintains a large gain bandwidth product and a fast slew rate. In addition, well matched high voltage JFET input devices provide very low input bias and offset currents. The LF147 is pin compatible with the standard LM148. This feature allows designers to immediately upgrade the overall performance of existing LF148 and LM124 designs. The LF147 may be used in applications such as high speed integrators, fast D/A converters, sample-and-hold circuits and many other circuits requiring low input offset voltage, low input bias current, high input impedance, high slew rate and wide bandwidth. The device has low noise and offset voltage drift.
The LF147 and LF347 are low‑cost, high‑speed quad JFET‑input operational amplifiers featuring internally trimmed offset voltage, low supply current, and high gain‑bandwidth product. They are pin‑compatible with the LM148 and intended for applications such as high‑speed integrators, fast D/A converters, and sample‑and‑hold circuits.
Key specifications include a 5 mV maximum input offset voltage, 50 pA input bias current, 13 V/µs slew rate, 4 MHz gain‑bandwidth product, and a supply current of 7.2 mA. The datasheet provides absolute maximum ratings, DC and AC electrical characteristics, typical performance curves, and physical dimensions for both DIP and surface‑mount packages.
| Input Offset Voltage | 5 mV max |
|---|---|
| Input Bias Current | 50 pA |
| Gain‑Bandwidth Product | 4 MHz |
| Slew Rate | 13 V/µs |
| Supply Current | 7.2 mA |
The maximum input offset voltage is 5 mV.
The gain‑bandwidth product is 4 MHz.
The typical supply current is 7.2 mA.
The slew rate is 13 V/µs.