The LT ®1678/LT1679 are dual/quad rail-to-rail op amps offering both low noise and precision:
The LT1678 and LT1679 are dual/quad rail‑to‑rail operational amplifiers offering ultra‑low noise (3.9 nV/√Hz typ at 1 kHz) and high precision (100 µV max offset). They operate from a single supply as low as 2.7 V up to 36 V and feature rail‑to‑rail input and output with a gain‑bandwidth product of 20 MHz.
Typical applications include strain‑gauge amplifiers, portable microphones, battery‑powered instrumentation, low‑noise signal processing, microvolt‑accuracy detection, and infrared detectors. The devices are offered in 8‑lead SO and 14‑lead SOQ packages with detailed electrical characteristics and absolute maximum ratings provided.
| Rail‑to‑Rail Input and Output | Yes |
|---|---|
| Low Voltage Noise (typical) | 3.9 nV/√Hz at 1 kHz |
| Offset Voltage (max) | 100 µV |
| Input Bias Current (max) | 20 nA |
| Gain Bandwidth Product | 20 MHz |
| Operating Temperature Range | –40 °C to 85 °C |
| Supply Voltage Range | 2.7 V to 36 V |
| Package Options | 8‑lead SO and 14‑lead SOQ |
The typical low‑frequency noise is 3.9 nV/√Hz at 1 kHz.
It can operate from a single supply voltage of 2.7 V up to 36 V.
The devices are offered in 8‑lead plastic SO and 14‑lead plastic SOQ packages.
The maximum offset voltage is 100 µV.